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"This morning, the sun endures past dawn.
I realize that it is August: the summer’s last stand."
- Sara Baume
Today’s Weather at a Glance
Updated Every Morning and as Needed Through the Day
(Averages Across Southern NH)
74Degrees
High Temperature
50%
Probability of Precipitation - Daytime
64Degrees
Low Temperature
20%
Probability of Precipitation - Nighttime
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Today in Peterborough, NH at a Glance
Today in Nashua, NH at a Glance
Your Daily Forecast - Three Days at a Time
No Active Advisories
None
Monday/Monday Night - August 17
Nashua - East
A 50 percent chance of showers between 1pm and 3pm. Mostly cloudy, with a high near 74. Southeast wind around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
A slight chance of showers between 11pm and 1am. Patchy fog. Otherwise, mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.
Peterborough - Central/West
A 50 percent chance of showers, mainly before 2pm. Mostly cloudy, with a high near 73. Calm wind becoming south around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
A slight chance of showers between 10pm and 1am. Patchy fog. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Tuesday/Tuesday Night - August 18
Nashua - East
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 82. Calm wind.
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 61. Calm wind.
Peterborough - Central/West
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 60. Calm wind.
Wednesday/Wednesday Night - August 19
Nashua - East
Sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
Mostly clear, with a low around 63.
Peterborough - Central/West
Sunny, with a high near 82. Calm wind becoming southwest around 5 mph in the afternoon.
Partly cloudy, with a low around 60.
Thursday/Thursday Night - August 20
Nashua - East
Peterborough - Central/West
Friday/Friday Night - August 21
Nashua - East
Peterborough - Central/West
Saturday/Saturday Night - August 22
Nashua - East
Peterborough - Central/West
Sunday/Sunday Night - August 23
Nashua - East
Peterborough - Central/West
Current Weather Readings in Peterborough, NH
Time of the readings below: 17 Aug 2026 12:14 PM
(FYI: The number in parentheses is the change in the last hour)
(Note: My weather Instruments are Offline from Midnight Wednesday to 7AM Thursday for system Back ups.)
Current Temperature:
67.5°F (1.0)
High Temperature:
69.8 at 12:00 AM
Low Temperature:
64.8 at 7:20 AM
Precipitation Today:
0.15 inches
Current Dewpoint:
65.7°F (0.7)
Highest Heat Index Reading:
69.8 at 12:00 AM
Current Windspeed:
1 MPH (-0)
Barometric Trend:
Steady
Hours of Daylight Today:
13:48
Link to my Active Weather Instruments
Information for New England
Seven Day Temperature Outlook - Manchester NH & Southern New England
Current Northeast Radar
Expected Temperature Range
Health - The Five Day Allergy & Mosquito Outlook for Southern NH
Rich's Weather Discussion
New Hampshire/North Briefing
Massachusetts/South Briefing
At this moment: 8/17 - 7:04 AM
Notes from Rich:
What is the 'Regular’ Schedule.
Weekdays: Morning updates each day before 8AM, Evening Updates before 7PM.
On Weekends: Perhaps a bit later. I like to sleep in.
Every Thursday morning I post the daily forecast through the weekend.
Upcoming Site Update Schedule Changes:
On Schedule.
Light showers were crossing the region this morning. Today it will be cloudy with hit or miss showers. probably a break from late morning into the afternoon, then a chance for a thunderstorms as a front passes. The atmosphere remains unstable on Tuesday with a chance of afternoon showers. Right now, both Wednesday and Thursday into Friday look dry, but you should check back because there are models that do bring in some precipitation.
Showers will continue this morning, with some locally heavy rain and a few thunderstorms possible. Rain should become more scattered and lighter this afternoon, although a few showers or storms could develop across the interior. Areas of fog and drizzle are likely tonight, followed by gradual improvement Tuesday. The middle to latter part of the week looks generally quiet, with a few opportunities for light rain before high pressure brings improving weather late in the week.
Fall is coming. That means beautiful foliage, cool weather and football. But, my fellow seasonal allergy sufferers, now is not the time to celebrate; it's time to prepare! Pumpkin spice season is, unfortunately, also hay fever season.
Ragweed, the No. 1 source of fall allergies, will start releasing pollen when nights begin to cool off, usually around late August. To best protect yourself from usual fall allergy symptoms, you should start taking your allergy medicine about two weeks before that. So, right about now.
The Drought Info has been updated.
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What information can you find on my site, and where is it?
The History Section has a lot of history to share, and I will be sharing video on this page from time to time. Updated every day with new weather history.
Find beach and hiking, and Ski information as well as travel info for the USA in the Travel and Leisure Section.
Find all Tropical Tracking/Hurricane information on the Tropics Page.
Find the current Drought Maps here. Now showing a map for each New England State.
Looking for Radar? Try the Radar Page.
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On this day in history:
On this day in 1978, three balloonists from Albuquerque, New Mexico, touched down in a French wheat field after 137 hours in the air, completing the first crossing of the Atlantic by balloon after 17 earlier attempts had failed.
Latest site updates and additions:
Find the August Almanac Here
Hurricane Season began on June 1st - Details and forecasts can be found here.
07/17 - Find the Mosquito Outlook in the Heath Section. Added Mosquito forecast for Nashua
05/01 - The Hampton Beach Report returns! Updated daily.
In the Health Section above, starting April 7, you will find the Allergy Forecasts for Southern NH.
You can find my weather Reading via Weather Underground here: Peterborough, NH Readings
Catch Weather News Headlines and links here.
I have updated Rain/Snowfall totals here.
Drought information updates every Other Thursday evening. Last update: 08/15 - Next Update: 08/31 (or thereabouts)
Weather Summaries and Full Area Forecast Discussions - North (Edited)
Summary - Northern New England - New Hampshire and Maine
Summary:
Showers will continue this morning, with some locally heavy rain and a few thunderstorms possible. Rain should become more scattered and lighter this afternoon, although a few showers or storms could develop across the interior. Areas of fog and drizzle are likely tonight, followed by gradual improvement Tuesday. The middle to latter part of the week looks generally quiet, with a few opportunities for light rain before high pressure brings improving weather late in the week.
Key Messages:
- Showers, possibly heavy at times, will continue through the morning before becoming lighter during the afternoon. A few thunderstorms are possible.
- Low-impact weather is expected through the middle to late part of the week, with a couple of chances for light rain.
What has changed since the last Forecast Update?
Most of the steady rain will remain over northern Maine this morning, with a few isolated to scattered showers elsewhere. More showers and a few rumbles of thunder will be possible later this afternoon. No major changes were needed for this update other than incorporating the latest observations into the forecast and updating the aviation forecast.
What this means for you:
Plan for a wet start to Monday, especially across northern and mountain areas, with some heavier downpours possible. Most locations should see lighter and more scattered showers this afternoon, but an isolated thunderstorm cannot be ruled out. Fog and drizzle are possible tonight. Tuesday should gradually improve, with warmer weather arriving Wednesday and generally lower-impact weather expected through the end of the week.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion, National Weather Service Gray ME, 632 AM EDT Monday, August 17, 2026**
**What has changed**
Most of the steady rain will remain over northern Maine this morning, with a few isolated to scattered showers elsewhere. More showers and a few rumbles of thunder will be possible later this afternoon. No major changes were needed for this update other than incorporating the latest observations into the forecast and updating the aviation forecast.
**Key Messages**
1. Showers, possibly heavy at times, will continue through the morning before becoming lighter during the afternoon. A few thunderstorms are possible.
2. Low-impact weather is expected through the middle to late part of the week, with a couple of chances for light rain.
**Discussion**
**Key Message 1**
A warm front will gradually lift northward through the forecast area early this morning. Increasing atmospheric moisture, with precipitable water values around 1.75 inches, will help produce showers that could be heavy at times. A thunderstorm is also possible.
The latest computer forecast models have been inconsistent regarding the potential for a 1 to 3 inch band of rain early this morning across the mountain areas. Locally heavier amounts are possible. However, the lack of consistency in the latest guidance lowers confidence that this heavier rain band will develop. Forecasters will continue to monitor the potential for localized flash flooding, although the strongest forcing, or the atmospheric lift needed to produce heavier rain, appears likely to remain north of the forecast area.
As the day progresses, low pressure will develop to our south and move northeast into the Gulf of Maine tonight. This will turn winds more northerly and gradually reduce atmospheric moisture as the middle levels of the atmosphere become drier. Showers should become more scattered, with some drizzle and fog possible along the coast.
The Connecticut River Valley could become unstable by late this afternoon, which could support thunderstorm development for a couple of hours before sunset.
Tonight will feature areas of fog and drizzle along with low clouds.
Gradual improvement is expected Tuesday, especially during the afternoon.
**Key Message 2**
On Tuesday, low-level moisture may remain trapped along the coast and across parts of the interior. Conditions will depend partly on how close the departing low pressure system remains as it moves away from southern New England toward and just outside the Gulf of Maine.
Northerly winds behind the low should gradually remove this moisture, but relatively weak winds around 10 knots about 5,000 feet above the ground will make the process slow.
Forecast models are showing the possibility of scattered afternoon showers or thunderstorms Tuesday across portions of the interior where lingering moisture combines with daytime heating. The lower atmosphere will remain moist, but the middle and upper atmosphere should be quite dry. Warm air higher in the atmosphere could also create a cap, which would limit the amount of instability available for thunderstorms.
Because of these factors, precipitation chances have been kept relatively low. Showers and thunderstorms are still possible, but they are expected to be more isolated because of the dry air aloft and limited instability.
Wednesday will be warmer as southerly winds develop ahead of an elongated cold front. High temperatures should reach the lower 80s, a few degrees warmer than Tuesday. The approaching front will bring precipitation with it, but the amount of atmospheric lift is uncertain because the main surface low will be located well to the north and east near Hudson Bay. Rain and showers across New England may therefore depend largely on daytime instability and the timing of the front.
A disturbance moving through the southern part of the weather pattern may pass south of the region Thursday, moving across the Gulf of Maine or the open Atlantic. This could produce a few showers along its northwestern edge, although a sufficiently dry layer in the atmosphere could prevent much precipitation from reaching the ground.
High pressure then appears likely to return to the region late in the week, potentially bringing a sunny start to next weekend.
Weather Summaries and Full Area Forecast Discussions - South (Edited)
Summary - Southern New England - Massachusetts/Northern CT/Rhode Island
Summary:
A cooler, humid day is ahead with periods of showers and extensive cloud cover. Heavy rain and flooding are not expected, although a few heavier downpours are possible. Tuesday will be mainly dry and seasonable, followed by several opportunities for showers from mid to late week. Beachgoers should use extra caution because of a High Risk for rip currents along south-facing beaches today and east-facing beaches Tuesday.
Key Messages:
- Showers and extensive cloud cover will lead to a cooler-than-normal and quite humid day. A High Risk for rip currents remains in effect for south-facing ocean beaches.
- Mainly dry Tuesday, with only isolated showers possible across eastern southern New England. Seasonable temperatures continue, with a High Risk for rip currents along east-facing ocean beaches.
- No washouts are expected, though several opportunities for showers return from mid to late week.
What has changed since the last Forecast Update?
A High Risk for rip currents was issued for south-facing ocean beaches today. Those heading to the coast should exercise caution.
What this means for you
Today will be cloudy, humid, and cooler than normal, with occasional showers continuing through the afternoon. Rainfall amounts should generally be light, although locally heavier amounts are possible. Tuesday looks much better, with more sunshine and temperatures mainly in the lower to middle 80s. The middle and latter part of the week will bring several chances for showers, but no widespread washout is expected. If heading to the coast, pay close attention to rip current conditions and follow lifeguard or beach staff guidance.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion, National Weather Service Boston/Norton MA
719 AM EDT Mon Aug 17 2026**
**WHAT HAS CHANGED**
A High Risk for rip currents was issued for south-facing ocean beaches today. Those heading to the coast should exercise caution.
**KEY MESSAGES**
Showers and extensive cloud cover will lead to a cooler-than-normal and quite humid day. A High Risk for rip currents remains in effect for south-facing ocean beaches.
Mainly dry Tuesday, with only isolated showers possible across eastern southern New England. Seasonable temperatures continue, with a High Risk for rip currents along east-facing ocean beaches.
No washouts are expected, though several opportunities for showers return from mid to late week.
**DISCUSSION**
**KEY MESSAGE 1, Showers and extensive cloud cover lead to a cooler-than-normal and quite humid day. A High Risk for rip currents remains in effect for south-facing ocean beaches.**
Showers early this morning will continue into the afternoon, although coverage should be lower than earlier today. Southern New England is positioned between two areas of low pressure, with the strongest weather-producing lift, known as forcing, located north and south of the region. This setup may make it difficult for the region to fully take advantage of the high PWAT, or precipitable water, values of 1.8 to 2.0 inches. These values indicate a fairly moist atmosphere. Even so, periodic showers will continue through this morning and afternoon.
The threat for heavy rainfall remains low. An isolated heavier downpour cannot be ruled out, but widespread heavy rainfall is not expected. Flooding is also a very low threat, with the main concern limited to localized flooding in urban areas or places where water drains poorly.
Rainfall amounts have trended lower across interior southern New England, generally ranging from one-tenth to two-tenths of an inch. Areas along and east of I-95 may receive around one-quarter to one-third of an inch. Localized higher amounts, potentially approaching one-half inch, remain possible beneath areas of weak convection, meaning areas where rising air produces a stronger shower or thunderstorm.
One final round of showers, and perhaps a thunderstorm or two, is possible with the passage of a cold front. However, abundant cloud cover will limit instability across much of southern New England. The greatest potential for thunderstorms will be across eastern New York, far western Massachusetts, and far northwestern Connecticut, where MUCAPE, a measure of the atmosphere available to support thunderstorms, may exceed 800 J/kg. Instability decreases considerably farther east.
Given the cloud cover and onshore flow, highs today will only reach the lower to middle 70s across eastern Massachusetts, Rhode Island, and eastern Connecticut. Farther west, temperatures climb into the middle to upper 70s. Dew points in the upper 60s to lower 70s will make it feel quite humid. While it will not be a hot day, it will certainly feel sticky.
It will not be an ideal beach day, but it is important to note the High Risk for rip currents along south-facing ocean beaches. Those heading to the beach should remain aware of local conditions and check with lifeguards or beach staff regarding rip current risks at their specific location.
**KEY MESSAGE 2, Mainly dry Tuesday, with only isolated showers possible across eastern southern New England. Seasonable temperatures continue, with a High Risk for rip currents along east-facing ocean beaches.**
Somewhat drier air moves into the region from the northwest late tonight into Tuesday, with PWAT, or precipitable water, values lowering to around 1.3 inches by Tuesday afternoon. A weak area of surface low pressure east of Cape Cod, along with lingering weak forcing, or rising motion in the atmosphere, may produce an isolated shower or two, mainly along and east of a line extending from Willimantic, Connecticut, through Worcester, Massachusetts, to Fitchburg, Massachusetts. The three locations correspond to the KIJD, KORH, and KFIT weather observation sites.
Otherwise, Tuesday will feature a mix of sun and clouds with seasonable temperatures in the lower to middle 80s. The eastern Massachusetts coast will likely remain a few degrees cooler, with highs in the upper 70s due to continued onshore flow.
A High Risk for rip currents is expected along east-facing ocean beaches Tuesday. Those heading to the beach should remain aware of local conditions and check with lifeguards or beach staff regarding rip current risks at their specific location.
**KEY MESSAGE 3, No washouts expected, though several opportunities for showers return from mid to late week.**
The flow high in the atmosphere becomes generally zonal, meaning mainly west-to-east, Wednesday through Friday. A stronger shortwave trough, or area of lower pressure and rising motion higher in the atmosphere, moves through eastern Canada late Wednesday into Thursday.
A leading shortwave may trigger a few showers late Wednesday night, though much of Wednesday should remain dry. The primary shortwave and an accompanying cold front move through Thursday, providing better lift along with PWAT, or precipitable water, values increasing to around 1.5 to 1.7 inches. This should bring an increased chance for showers, although widespread or continuous rainfall is not expected.
High pressure is then expected to build eastward, bringing mainly dry conditions. However, forecast guidance continues to indicate the potential for a boundary to stall offshore, with a series of embedded shortwaves moving along it from Friday into the weekend. This could result in periodic chances for showers, and perhaps a few thunderstorms, with the greatest risk generally focused across the south coast and Cape Cod and the Islands.
Wednesday will be the warmest day of this period, with highs in the middle to upper 80s and tolerable humidity as dew points remain in the 60s. Temperatures trend downward by a degree or two Thursday and Friday, with cooler conditions expected this weekend as highs generally range from the upper 70s to near 80 degrees.
Countdown to Autumn
Autumn Begins on: September 23, 2026 at 2:05 AM EDT
92Days18Hours28Mins13Secs
Five Day Daily Temperature Run - Peterborough, NH
Updated Every Morning
Normal Daily Averages
High Temperature: 77 Degrees - Low Temperature: 55 Degrees
(Tip: Place your cursor over the bar below to see the number)
Weather News/Headlines of Interest
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Dangerous heat dome to reign across the South with little relief through Monday
Sucky situation! Wild moment octopus latches onto fisherman’s face forcing him to club it to escape
Fall forecast 2026: Summer warmth may linger US as El Nino intensifies
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