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Slight Chance of Showers &
T-Storms, otherwise Partly Cloudy Tonight
Sunny Tuesday
Last Complete Site Update: 8/10 - 4:20 PM
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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)
86Degrees
High Temperature
0%
Probability of Precipitation - Daytime
65Degrees
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 10
Nashua - East
A slight chance of showers and thunderstorms between 9pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 66. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Peterborough - Central/West
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday/Tuesday Night - August 11
Nashua - East
Sunny, with a high near 86. Northwest wind 5 to 10 mph.
Partly cloudy, with a low around 60. Northwest wind around 5 mph becoming calm.
Peterborough - Central/West
Sunny, with a high near 82. Northwest wind 5 to 10 mph.
Increasing clouds, with a low around 58. Calm wind.
Wednesday/Wednesday Night - August 12
Nashua - East
Sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Mostly clear, with a low around 59. Calm wind.
Peterborough - Central/West
Partly sunny, then gradually becoming sunny, with a high near 80. Calm wind becoming northwest around 5 mph in the afternoon.
Mostly clear, with a low around 56. Calm wind.
Thursday/Thursday Night - August 13
Nashua - East
A 40 percent chance of showers after 9am. Mostly sunny, with a high near 82.
Peterborough - Central/West
A 40 percent chance of showers after 9am. Partly sunny, with a high near 77.
Friday/Friday Night - August 14
Nashua - East
Peterborough - Central/West
Saturday/Saturday Night - August 15
Nashua - East
Peterborough - Central/West
Sunday/Sunday Night - August 16
Nashua - East
Peterborough - Central/West
Current Weather Readings in Peterborough, NH
Time of the readings below: 11 Aug 2026 6:07 AM
(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:
67.9°F (-0.3)
High Temperature:
69.9 at 12:35 AM
Low Temperature:
66.4 at 3:18 AM
Precipitation Today:
0.00 inches
Current Dewpoint:
65.2°F (-0.3)
Highest Heat Index Reading:
69.9 at 12:35 AM
Current Windspeed:
2 MPH (2)
Barometric Trend:
Steady
Hours of Daylight Today:
14:04
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: 8/10 - 4:20 PM
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:
None
A weak passing cold front tonight will bring a small chance of a shower or thunderstorm. Tuesday looks similiar, with Thursday being the main transistion day this week. Still very warm and humid MA line south. By the end of the week, highs will be in the 70s with lows in 50s.
Partial Solar Eclipse on Wednesday. See the graphics in the News Section for viewing details.
A weak cold front will move through the region tonight, bringing scattered showers and thunderstorms, mainly across northern and northwestern areas. Drier and more comfortable air will follow Tuesday, with cooler temperatures developing through the second half of the week. Another round of showers and thunderstorms is likely Thursday and/or Friday, although rainfall amounts are not expected to be especially heavy. High astronomical tides could produce some coastal high water, but significant coastal flooding is not expected.
Start looking up next week:
4 major celestial events to dominate the night sky next week
Check out the enhanced "Todays Weather at a Glance" section above.
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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.
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On this day in history:
On this day in 1821, Missouri entered the Union as the 24th state, the first located entirely west of the Mississippi River, pushing the American frontier deeper into the West.
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
05/02 - Find the Summer 2026 Outlook for the USA here.
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: 07/30 - Next Update: 08/16 (or thereabouts)
Weather Summaries and Full Area Forecast Discussions - North (Edited)
Summary - Northern New England - New Hampshire and Maine
Summary:
A weak cold front will move through the region tonight, bringing scattered showers and thunderstorms, mainly across northern and northwestern areas. Drier and more comfortable air will follow Tuesday, with cooler temperatures developing through the second half of the week. Another round of showers and thunderstorms is likely Thursday and/or Friday, although rainfall amounts are not expected to be especially heavy. High astronomical tides could produce some coastal high water, but significant coastal flooding is not expected.
Key Messages:
- A weak front passes through tonight with some showers and storms, followed by a continued gradual transition to drier and cooler conditions.
- A broad trough will bring cooler temperatures during the second half of the week. Showers and thunderstorms are likely Thursday and/or Friday. Astronomical tides will be high, but coastal impacts should remain minimal.
What has changed since the last Forecast Update?
No major changes for this forecast package.
What this means for you:
Expect a few showers and thunderstorms tonight, with the greatest chance across northern New Hampshire and areas closer to the Canadian border. Tuesday should turn mainly sunny and more comfortable, followed by a noticeable cool-down later in the week. Thursday and Friday could bring another period of unsettled weather, but the current forecast does not suggest a major rainfall event. Along the coast, tides will be unusually high later in the week, so some minor coastal high water is possible.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion**
**National Weather Service Gray ME**
**253 PM EDT Monday, August 10, 2026**
**What Has Changed**
No significant changes to the forecast at this time.
**Key Messages**
1. A weak front passes through tonight with some showers and storms, followed by a continued gradual transition to drier and cooler conditions.
2. A broad trough will bring cooler temperatures during the second half of the week. Showers and thunderstorms are likely Thursday and/or Friday. Astronomical tides will be high, but coastal impacts should remain minimal.
**Discussion**
**Key Message 1**
A weak area of low pressure will track through Quebec tonight, bringing a weak cold front through the region. Showers and thunderstorms will reach northwestern areas late this afternoon and evening ahead of the front.
The greatest chance for showers and storms will be near the Canadian border and closer to the center of the low pressure system. Activity should become more scattered farther south and toward the coast.
A stronger storm with gusty winds cannot be ruled out across northern New Hampshire early this evening. Otherwise, showers and thunderstorms should gradually weaken as they move eastward during the late evening and overnight.
Any lingering showers should move offshore by dawn Tuesday, followed by clearing skies. Areas that receive rain this evening could develop some patchy fog by Tuesday morning, especially in the northern valleys.
Mainly sunny skies are expected south of the mountains Tuesday, with a few more clouds and isolated afternoon showers possible across the higher terrain.
The air mass will continue to slowly cool behind each passing front. High temperatures Tuesday should range from the mid 70s across northern areas to the mid 80s along the coast and across southern New Hampshire.
Dew points, which indicate the amount of moisture in the air and how humid it feels, will fall into the 50s to low 60s. This will make the air feel considerably more comfortable.
With the drier air in place, overnight temperatures Tuesday night should fall into the 50s across most areas, with some upper 40s possible in the northern valleys. Southern New Hampshire should remain closer to 60 degrees, where some middle and high level clouds could keep temperatures a little warmer.
**Key Message 2**
A broad mid-level trough will move across the Northeast by Wednesday morning. A trough is an elongated area of lower pressure in the upper atmosphere that generally supports cooler and more unsettled weather.
The trough should bring cooler, more seasonable temperatures during the second half of the week. Ensemble guidance, which combines many forecast model simulations to show the range of possible outcomes, has been somewhat cooler than the latest National Blend of Models forecast. High temperatures for Wednesday and Thursday were adjusted downward by 2 to 3 degrees.
It should be difficult for most locations to reach 85 degrees from Wednesday through Friday. Cooler temperatures should continue into the upcoming weekend.
**Thursday and Friday Weather**
Low pressure is expected to move across the region at some point Thursday or Friday. Forecast guidance agrees that the upper-level trough will move into the area and likely strengthen as it interacts with the upper-level jet stream, a fast-moving current of air several miles above the surface.
During this period, rain and thunderstorms are likely and could become fairly widespread. However, there will not be a large amount of moisture available to the system.
PWAT, or precipitable water, measures the total amount of moisture available in the atmosphere. Forecast PWAT values are expected to be around 1.1 to 1.5 inches, which is relatively dry for a low pressure system overhead.
Because of the limited moisture, rainfall amounts are not currently expected to be especially heavy or cause significant impacts.
**Coastal Tides**
High tides will need to be monitored Thursday. Astronomical tides, which are the naturally occurring tides caused primarily by the gravitational effects of the moon and sun, will be relatively high for the month.
Tide gauges will be close to minor flood stage. Light offshore winds and very low wave heights should prevent the Portland and Hampton gauges from reaching minor flood stage.
Some periods of higher water along the coast are likely, but overall coastal impacts should remain minimal.
Weather Summaries and Full Area Forecast Discussions - South (Edited)
Summary - Southern New England - Massachusetts/Northern CT/Rhode Island
Summary:
Hot and humid weather continues through Tuesday, with temperatures reaching the upper 80s to around 90 degrees in the warmest locations. A few showers and thunderstorms are possible this evening, mainly between 5 and 9 PM. Tuesday and Wednesday should be mainly dry and sunny, followed by a more unsettled period late Wednesday night into Thursday. Cooler and much less humid weather is expected by the weekend.
Key Messages:
- Above normal temperatures and humidity continue through Tuesday. Relief from the heat and humidity comes late week and especially this weekend.
- Unsettled weather continues this week, with shower and thunderstorm chances returning this evening, as well as Wednesday night and Thursday morning.
What has changed since the last Forecast Update?
Forecast remains on track.
What this means for you
Expect another hot and humid day Tuesday, with a chance for a few showers or thunderstorms this evening. Most areas should avoid prolonged or severe storms. Weather turns cooler and less humid later this week, with the weekend looking especially comfortable.
Click the Open/Close Button to Display the Full Edited Area Forecast Discussion
**Area Forecast Discussion, National Weather Service Boston/Norton MA, 247 PM EDT Monday, August 10, 2026**
**What has Changed**
Forecast remains on track.
**Key Messages**
Above normal temperatures and humidity continue through Tuesday. Relief from the heat and humidity comes late week and especially this weekend.
Unsettled weather continues this week, with shower and thunderstorm chances returning this evening, as well as Wednesday night and Thursday morning.
**Discussion**
**Key Message 1, Above normal temperatures and humidity continue through Tuesday**
A fairly persistent temperature pattern continues to start the week, with the overall weather pattern remaining fairly zonal, meaning weather systems are generally moving from west to east without a major change in the overall pattern.
Weather models show the atmosphere mixing upward to around 850 mb, which is roughly 5,000 feet above sea level. Temperatures at that level will be around 61 degrees, supporting afternoon highs in the upper 80s, with some locations possibly reaching around 90 degrees today and Tuesday.
Temperatures will gradually cool through the work week, especially by the weekend. Temperatures around 5,000 feet are expected to fall to about 55 degrees by midweek, leading to afternoon highs ranging from the upper 70s in higher elevations to the mid 80s elsewhere.
The weekend looks especially comfortable. Humidity levels, which will be elevated at times this week but are not expected to become oppressive, should drop significantly by the weekend. Dewpoints, which are a measure of the amount of moisture in the air, could fall into the upper 40s to lower 50s.
This should result in cooler nights in the 50s, while afternoon temperatures may remain in the 70s for many locations.
**Key Message 2, Unsettled weather continues this week**
There is a fairly narrow window for thunderstorms this afternoon and early evening, mainly from about 5 to 9 PM. Atmospheric instability, measured by a value called CAPE, or Convective Available Potential Energy, is expected to peak around 750 to 1,100 J/kg during this period. CAPE is a measure of how much energy is available in the atmosphere to support thunderstorms.
That instability should decrease quickly after sunset. There is not enough large-scale weather system support, known as synoptic forcing, to keep the storms going for an extended period.
A few thunderstorms could continue after sunset, but they should weaken as they move across southern New England, especially before reaching eastern Massachusetts.
Most of the stronger thunderstorms are expected to remain over Pennsylvania and New York State, mainly to our south and west. However, storms could remain somewhat stronger as they move toward the Connecticut River Valley, so this area will continue to be monitored.
Tuesday and Wednesday should remain dry and mostly sunny, with more comfortable humidity.
**Late Wednesday Night Into Thursday Night**
The forecast becomes more complicated from late Wednesday night through Thursday night. A frontal boundary is expected to meander across southern New England, but the exact timing remains uncertain.
This front should trigger periods of showers, but the region should not experience a washout. High pressure should finally move close enough on Friday to push the front offshore and bring drier and cooler weather into early next week.
**What this means for you**
The main concern this evening is the possibility of a few thunderstorms between roughly 5 and 9 PM, followed by improving weather overnight. Tuesday and Wednesday look much quieter, although Tuesday will remain hot and humid.
The biggest change comes later in the week, with cooler and much less humid conditions expected by the weekend.
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: 56 Degrees
(Tip: Place your cursor over the bar below to see the number)
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Perseid meteor shower peaks Wednesday night under ideal conditions
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