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Last Complete Site Update: 9/14 - 7:09 AM

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"By all these lovely tokens, September days are here.
With summer's best of weather and autumn's best of cheer."
- Helen Hunt Jackson

Today’s Weather at a Glance

Updated Every Morning and as Needed Through the Day

(Averages Across Southern NH)
70Degrees
High Temperature
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Probability of Precipitation - Daytime
43Degrees
Low Temperature
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Probability of Precipitation - Nighttime
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Today in Peterborough, NH at a Glance

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Today in Nashua, NH at a Glance

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Your Daily Forecast - Three Days at a Time

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Monday/Monday Night - September 14

Nashua - East

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Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

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Patchy fog after 2am. Otherwise, clear, with a low around 44. North wind around 5 mph becoming calm in the evening.

Peterborough - Central/West

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Sunny, with a high near 67. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

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Clear, with a low around 42. North wind around 5 mph becoming calm.

Tuesday/Tuesday Night - September 15

Nashua - East

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Patchy fog before 9am. Otherwise, sunny, with a high near 72. Calm wind becoming southeast around 5 mph.

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Mostly clear, with a low around 50. Southeast wind around 5 mph becoming calm.

Peterborough - Central/West

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Sunny, with a high near 69. Calm wind becoming south around 5 mph.

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Partly cloudy, with a low around 49. Calm wind.

Wednesday/Wednesday Night - September 16

Nashua - East

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Sunny, with a high near 81. Southwest wind around 5 mph.

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Partly cloudy, with a low around 59.

Peterborough - Central/West

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Mostly sunny, with a high near 77. Southwest wind around 5 mph.

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Partly cloudy, with a low around 57.

Thursday/Thursday Night - September 17

Nashua - East

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Peterborough - Central/West

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Friday/Friday Night - September 18

Nashua - East

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Peterborough - Central/West

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Saturday/Saturday Night - September 19

Nashua - East

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Peterborough - Central/West

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Sunday/Sunday Night - September 20

Nashua - East

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Peterborough - Central/West

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Current Weather Readings in Peterborough, NH

Time of the readings below: 14 Sep 2026 2:15 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: 

65.6°F (0.3)

High Temperature:

66.3 at 2:02 PM

Low Temperature:

58.3 at 8:12 AM

Precipitation Today:

0.00 inches

Current Dewpoint:

45.4°F (-1.8)

Highest Heat Index Reading:

66.3 at 2:02 PM

Current Windspeed:

2 MPH (-0)

Barometric Trend:

Steady

Hours of Daylight Today:

12:31

Link to my Active Weather Instruments

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Information for New England

Rich's Weather Discussion

New Hampshire/North Briefing

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Massachusetts/South Briefing

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At this moment: 9/14 - 7:09 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: 

Back on the regular schedule- Site is completely updated.

Temps were in the mid and upper 50s this morning across southern NH and south into MA. A few lingering showers are moving off the coast. Skies will turn sunny today with a brisk wind out of the north west. High temps will be in the upper 60s and low 70s. Much colder tonight with frost advisories in the far north and temps dropping into the low to mid 40s here in the south.
Temps bounce back on Tuesday with light winds. Dry weather is expected through mid week.

A chilly start this morning will quickly give way to sunshine and gusty west to northwest winds. Any remaining showers and fog should end early, with wind gusts reaching 25 to 30 MPH and possibly a little higher. Temperatures will reach the 60s in the mountains and the 70s at lower elevations. Clear skies and light winds tonight will allow temperatures to drop sharply, with areas of frost possible in the mountains.
High pressure will bring mostly dry and seasonable weather through Wednesday and early Thursday. Temperatures should remain in the 70s. A storm system and associated frontal boundary may bring rain Thursday afternoon into early Friday. Forecast confidence on the exact amount of rain is still limited, but at least some wetting rain appears likely, with the potential for more meaningful rainfall.

After nearly two weeks of an empty map, the National Hurricane Center has circled an area about 1,000 miles southeast of Bermuda that could end up developing, if it manages to survive the strong wind shear that has been keeping the basin so quiet so far this year.
Zoom out: While last week marked what is usually the peak of the Atlantic hurricane season, there's a chance that we may not see a single hurricane in the Atlantic this month. If that happens, it would be only the third time since World War II for the Atlantic hurricane season to go zero for September, and the first time in over three decades (since 1994). That's just how powerful the current El Nino is.
Sea surface temperatures are record hot, but this El Nino is leading to the kind of wind shear we usually see in December, when Atlantic hurricanes are incredibly infrequent: There's plenty of fuel for hurricanes to feed on, but the wind is preventing any momentum from getting started in the first place. While everyone who lives in traditionally hurricane-prone areas is certainly enjoying the lack of drama this year, just because we're past the peak of hurricane season doesn't mean that we won't see any more storms. As fall fronts move in, we'll have to be alert to the possibility of other systems popping up in the subtropics around Florida and the Gulf.
The water there remains incredibly warm, so keep those weather alerts on, and we'll do our part to let you know when to keep a close eye on the weather.

I have added NFL Football Weather for each game- Updated weekly/daily as needed - Find the list here
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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.
Looking for Weather News from Across the globe, plus more local weather info? Look here.
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On this day in history:
On this day in 1814, Francis Scott Key watched the American flag still flying over Baltimore's Fort McHenry after a 25-hour British bombardment and scribbled a poem on the back of a letter. Set to music, The Star-Spangled Banner officially became our national anthem in 1931.

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Latest site updates and additions:

09/13 - NFL Football weather for all games can be found here: NFL Weather
08/17 - See the First look at Autumn Maps and info here
Find the September Almanac Here
Hurricane Season began on June 1st - Details and forecasts can be found 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: 08/30 - Next Update: 09/15 (or thereabouts)
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Weather Summaries and Full Area Forecast Discussions - North (Edited)

Summary - Northern New England - New Hampshire and Maine

Summary:
A chilly start this morning will quickly give way to sunshine and gusty west to northwest winds. Any remaining showers and fog should end early, with wind gusts reaching 25 to 30 MPH and possibly a little higher. Temperatures will reach the 60s in the mountains and the 70s at lower elevations. Clear skies and light winds tonight will allow temperatures to drop sharply, with areas of frost possible in the mountains.
High pressure will bring mostly dry and seasonable weather through Wednesday and early Thursday. Temperatures should remain in the 70s. A storm system and associated frontal boundary may bring rain Thursday afternoon into early Friday. Forecast confidence on the exact amount of rain is still limited, but at least some wetting rain appears likely, with the potential for more meaningful rainfall.

Key Messages:

 - Any showers will end by 12Z this morning and fog will quickly lift. Westerly wind gusts up to 30 MPH are expected today. Frost is possible tonight in the mountains.
 - High pressure is likely to continue dry weather through midweek, with a frontal boundary likely to bring rain to the area from Thursday into Friday morning.

What has changed since the last Forecast Update?
No significant changes.

What this means for you:
Plan on a much nicer afternoon after a damp start, but it will be breezy, especially during the daytime. If you live in the mountains, be prepared for a colder night with a chance of frost. The middle of the week looks comfortable and mostly dry, while rain becomes increasingly likely Thursday into Friday morning.

Click the Open/Close Button to Display the Full Edited Area Forecast Discussion

**Area Forecast Discussion, National Weather Service Gray ME, 644 AM EDT Monday September 14 2026**

**What Has Changed**


No changes were needed.

**Key Messages**

1. Any showers will end by 7AM this morning and fog will quickly lift. Westerly wind gusts up to 30 MPH are expected today. Frost is possible tonight in the mountains.

2. High pressure is likely to continue dry weather through midweek, with a frontal boundary likely to bring rain to the area from Thursday into Friday morning.

**Discussion**

**Key Message 1**


A cold front will pass east of the forecast area early this morning. This will bring an end to any remaining scattered showers by sunrise. Atmospheric mixing, meaning stronger movement of air through the lower atmosphere, will develop fairly quickly as well. This should cause any fog and low clouds to dissipate early.

A strong pressure gradient, meaning a large difference in air pressure over a relatively short distance, will be in place today. This will help produce gusty northwest winds. BUFKIT soundings, computer-generated profiles showing how temperature, moisture, and wind change with height, indicate a good chance of wind gusts between 25 and 30 MPH, with a few higher gusts possible.

Temperatures should rebound into the 70s at lower elevations downwind of the mountains, while temperatures remain in the 60s in the mountains where upslope clouds are expected. The rest of the forecast area should see a good deal of sunshine.

High pressure will move quickly overhead tonight, allowing for efficient radiational cooling. This occurs when the ground loses heat rapidly under clear skies and lighter winds. Areas of frost are possible in the mountains as overnight low temperatures fall into the lower to middle 30s.

The high pressure system will slowly move offshore Tuesday, allowing a light southerly return flow, meaning winds coming back from the south, during the afternoon. High temperatures should be within a couple of degrees of 70 degrees across the area.

**Key Message 2**

High pressure over New England will keep the area mostly dry and seasonable on Wednesday and early Thursday. Temperatures look to remain in the 70s through the second half of the week.

A low pressure system looks to move eastward on Thursday, potentially bringing rain across the Northeast Thursday afternoon and into early Friday. Forecast models have not yet reached agreement on exactly how much rain could fall.

PWATs, or precipitable water values, are forecast near 1.7 inches. This measures the total amount of moisture available in the atmosphere if all of the water vapor were condensed into rain, and 1.7 inches would approach the 99th percentile for this time of year.

The unusually high atmospheric moisture suggests that showers along the frontal boundary could produce rain efficiently. With this in mind, at least some wetting rain appears likely, although more meaningful rainfall is possible.

Weather Summaries and Full Area Forecast Discussions - South (Edited)

Summary - Southern New England - Massachusetts/Northern CT/Rhode Island

Summary:
A brief shower is possible early this morning as a cold front moves through, but otherwise pleasant, dry weather will settle in across southern New England. Today will be sunny, mild, and breezy with low humidity, followed by cooler temperatures Tuesday. Warmer than normal temperatures return Wednesday and continue through the end of the week, with mainly dry weather and only a chance of a few showers late Thursday into early Friday.

Key Messages:

 - A brief passing shower is possible early this morning. Otherwise, dry and very pleasant weather is expected today and Tuesday. Highs will be in the 70s today and mainly in the upper 60s to lower 70s Tuesday. Lows tonight and Tuesday night will mainly be in the 40s to lower 50s.
 - Above normal temperatures return Wednesday through the end of the week, with highs mainly in the 70s to near 80 degrees. A few showers are possible sometime late Thursday into early Friday, but dry weather will dominate.

What has changed since the last Forecast Update?
No significant changes to the forecast.

What this means for you
Today looks like a very nice September day, with sunshine, comfortable humidity, and temperatures well into the 70s. It will be breezy, especially during the afternoon. Tuesday will be cooler but still sunny and dry. After that, temperatures warm back into the 70s and near 80 through the end of the week. There could be a few showers late Thursday into early Friday, but most of the week should remain dry.

Click the Open/Close Button to Display the Full Edited Area Forecast Discussion

**Area Forecast Discussion, National Weather Service Boston/Norton MA, 713 AM EDT Monday September 14 2026**

No significant changes to the forecast.

**Key Messages**

1. A brief passing shower is possible early this morning. Otherwise, dry and very pleasant weather is expected today and Tuesday. Highs will be in the 70s today and mainly in the upper 60s to lower 70s Tuesday. Lows tonight and Tuesday night will mainly be in the 40s to lower 50s.

2. Above normal temperatures return Wednesday through the end of the week, with highs mainly in the 70s to near 80 degrees. A few showers are possible sometime late Thursday into early Friday, but dry weather will dominate.

**Discussion**

**Key Message 1, Brief shower, then pleasant weather**


A cold front will cross the region early this morning, bringing the possibility of a brief passing shower. The front will also help clear out the remaining fog fairly quickly.

Otherwise, dry and very pleasant weather is expected today and Tuesday. Skies will quickly become sunny this morning. With a mild start to the day, temperatures should reach well into the 70s this afternoon. Humidity will remain low, making for comfortable conditions.

North to northwest winds will become somewhat breezy, generally around 20 to 25 mph, with a few gusts possibly reaching near 30 mph. Despite the breeze, it should be a beautiful day across the region.

High pressure will build in from the west tonight, causing winds to gradually diminish. It will remain somewhat breezy on Cape Cod and Nantucket. Low temperatures tonight will be cool, mainly in the 40s to lower 50s.

Tuesday will be sunny but cooler, with high temperatures mainly in the upper 60s to lower 70s. Some locations along the immediate eastern Massachusetts coast may only reach the middle 60s.

**Key Message 2, Warmer weather returns**

An upper-level trough, an area of lower pressure in the middle and upper atmosphere, will shift east of the region. This will allow warmer air several thousand feet above the ground to move in from the west.

As a result, above normal temperatures will return Wednesday and continue through Friday. High temperatures will generally be in the 70s to near 80 degrees.

A shortwave, a smaller disturbance moving through the upper atmosphere, along with a cold front, may bring a few showers to the region sometime late Thursday into early Friday.

Overall, however, a dry and tranquil weather pattern will dominate most of the week.

Countdown to Autumn

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Autumn Begins on: September 23, 2026 at 2:05 AM EDT

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Five Day Daily Temperature Run - Peterborough, NH
Updated Every Morning

Normal Daily Averages
High Temperature: 69 Degrees - Low Temperature: 47 Degrees

(Tip: Place your cursor over the bar below to see the number)

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