New Hampshire (Concord)
September
Weather in New Hampshire for September 2026
Your guide to New Hampshire weather in September - trends and predictions
The forecast for the next days in New Hampshire predicts temperatures to be around 25 °F, close to the historical average.
In general, the average temperature in New Hampshire at the beginning of September is 22.3 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 22.6 °F by the end of September.
New Hampshire experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 302 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
22°/11°
Temperatures
12 km/h
Avg max wind
73 %
Avg humidity
New Hampshire Weather September
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What’s the Weather Like in New Hampshire This September?
Discover the average temperatures and weather trends across New Hampshire’s cities this September.
Temperatures trend during September in New Hampshire
See the weather trend as well as the moving average line
September weather in New Hampshire day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 21° /13° | 89.8 mm | 4 | |
| Sept. 2 |  Fog | 22° /14° | 0.1 mm | 3 | |
| Sept. 3 | Fog | 25° /13° | 75.4 mm | 4 | |
| Sept. 4 | Mist | 24° /9° | 0 mm | 5 | |
| Sept. 5 |  Patchy rain possible | 18° /14° | 0.9 mm | 2.4 | |
| Sept. 6 | Light rain shower | 21° /12° | 5.6 mm | 5.6 | |
| Sept. 7 |  Sunny | 25° /10° | 0 mm | 5.8 | |
| Sept. 8 | Overcast | 26° /15° | 0 mm | 5.4 | |
| Sept. 9 | Overcast | 21° /16° | 5.6 mm | 5 | |
| Sept. 10 | Overcast | 21° /12° | 2.3 mm | 5 | |
| Sept. 11 | Overcast | 18° /8° | 0 mm | 5 | |
| Sept. 12 | Sunny | 21° /5° | 0 mm | 6 | |
| Sept. 13 |  Partly cloudy | 25° /8° | 0.1 mm | 6 | |
| Sept. 14 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 15 | Sunny | 33° /20° | 0 mm | 8 | |
| Sept. 16 |  Thundery outbreaks possible | 35° /22° | 0 mm | 8 | |
| Sept. 17 | Sunny | 35° /23° | 5.3 mm | 8 | |
| Sept. 18 | Sunny | 22° /9° | 1.8 mm | 6 | |
| Sept. 19 | Partly cloudy | 22° /10° | 0 mm | 5 | |
| Sept. 20 | Sunny | 19° /6° | 0 mm | 5 | |
| Sept. 21 | Partly cloudy | 18° /5° | 0 mm | 5 | |
| Sept. 22 | Overcast | 21° /11° | 0 mm | 2 | |
| Sept. 23 |  Cloudy | 24° /15° | 0 mm | 3 | |
| Sept. 24 |  Heavy rain | 17° /14° | 143 mm | 1 | |
| Sept. 25 |  Moderate or heavy rain shower | 21° /13° | 53.8 mm | 1 | |
| Sept. 26 | Fog | 25° /17° | 27.9 mm | 3 | |
| Sept. 27 | Sunny | 23° /14° | 0 mm | 4 | |
| Sept. 28 | Overcast | 24° /16° | 0 mm | 3 | |
| Sept. 29 | Sunny | 26° /13° | 0 mm | 4 | |
| Sept. 30 | Overcast | 22° /13° | 0 mm | 4 | |
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Important Notice
Our weather forecast for New Hampshire in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the New Hampshire forecast closer to your planned date for the most up-to-date weather information.
Change Month
New Hampshire in September - FAQ
What are the expected maximum and minimum temperatures in New Hampshire during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in New Hampshire during September?
Significant rainfall exceeding 302 mm is expected in New Hampshire during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New Hampshire during September?
The average wind speed in New Hampshire during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in New Hampshire
Explore the daily rainfall trends and prepare for New Hampshires September weather 💧
Typically, New Hampshire has 6 rainy days in September with a total of 302 mm of rainfall.
UV exposure in New Hampshire during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is New Hampshire?Get accurate weather forecasts for New Hampshire, located at latitude 43.208 and longitude -71.538. Stay updated with localized weather information tailored for New Hampshire.
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