September
Weather in New Hampshire for September 2026
Your guide to New Hampshire weather in September - trends and predictions
In general, the average temperature in New Hampshire at the beginning of September is 20.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.9 °F by the end of September.
With an average of 5 rainy days, New Hampshire experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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25
Dry days
5
Rainy days
0
Snow days
21°/11°
Temperatures
10 km/h
Avg max wind
75 %
Avg humidity
New Hampshire Weather September
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Temperatures trend during September in New Hampshire
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September weather in New Hampshire day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 23° /11° | 0 mm | 7 | |
| Sept. 2 |  Cloudy | 22° /14° | 0 mm | 5 | |
| Sept. 3 | Cloudy | 23° /14° | 0 mm | 7 | |
| Sept. 4 |  Fog | 17° /12° | 0 mm | 2 | |
| Sept. 5 |  Moderate rain | 21° /13° | 23.2 mm | 1 | |
| Sept. 6 |  Moderate or heavy rain shower | 22° /16° | 36.7 mm | 2 | |
| Sept. 7 |  Heavy rain at times | 13° /10° | 16.1 mm | 1 | |
| Sept. 8 |  Sunny | 21° /8° | 0 mm | 6 | |
| Sept. 9 | Sunny | 20° /6° | 0 mm | 6 | |
| Sept. 10 |  Overcast | 20° /8° | 0 mm | 6 | |
| Sept. 11 | Partly cloudy | 23° /9° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 19° /5° | 0 mm | 6 | |
| Sept. 13 | Overcast | 19° /8° | 0 mm | 5 | |
| Sept. 14 | Fog | 22° /8° | 0 mm | 3 | |
| Sept. 15 | Fog | 20° /8° | 0 mm | 3 | |
| Sept. 16 | Cloudy | 21° /14° | 0 mm | 4 | |
| Sept. 17 | Fog | 21° /9° | 0 mm | 3 | |
| Sept. 18 | Partly cloudy | 26° /12° | 0 mm | 5 | |
| Sept. 19 | Partly cloudy | 20° /9° | 0 mm | 5 | |
| Sept. 20 | Sunny | 18° /6° | 0 mm | 5 | |
| Sept. 21 | Sunny | 17° /7° | 0 mm | 5 | |
| Sept. 22 | Mist | 19° /8° | 0 mm | 2 | |
| Sept. 23 | Overcast | 22° /14° | 0 mm | 2 | |
| Sept. 24 | Mist | 17° /15° | 26.7 mm | 1 | |
| Sept. 25 |  Heavy rain | 19° /11° | 81.9 mm | 1 | |
| Sept. 26 | Partly cloudy | 25° /15° | 0 mm | 4 | |
| Sept. 27 | Sunny | 22° /10° | 0 mm | 4 | |
| Sept. 28 | Overcast | 25° /15° | 0 mm | 3 | |
| Sept. 29 | Sunny | 25° /10° | 0 mm | 4 | |
| Sept. 30 | Sunny | 20° /9° | 0 mm | 4 | |
| Next | |||||
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.
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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 21° 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 184.6 mm is expected in New Hampshire during September, occurring over more than 5 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 10 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 5 rainy days in September with a total of 184.6 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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