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Weather & Climate
Windham, New Hampshire, United States
Overview
Climate data and monthly weather averages for Windham.
Key Metrics
Annual Avg
8.6°C
Summer Avg
20.4°C
Winter Avg
-3.6°C
Record High
37.9°C
Record Low
-29.4°C
Annual Precipitation
1180.3 mm
Avg Humidity
81%
Summer Humidity
78%
Winter Humidity
88%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.8° | -5.2° | -28.3° | 73.5 | 89% | 57 | 31.4 |
| Feb | 19.2° | -4.2° | -29.4° | 82.6 | 88% | 74 | 37.3 |
| Mar | 24.4° | 0.3° | -24.3° | 99.2 | 83% | 114 | 35.3 |
| Apr | 30.4° | 6.9° | -8.8° | 102 | 79% | 142 | 30.7 |
| May | 30.7° | 13.1° | -1.6° | 97.6 | 79% | 164 | 23.6 |
| Jun | 34.3° | 18.2° | 3.8° | 114.6 | 80% | 172 | 17.9 |
| Jul | 35° | 21.8° | 9.7° | 97 | 78% | 185 | 17.3 |
| Aug | 37.9° | 21.3° | 8.4° | 94.9 | 76% | 165 | 26.9 |
| Sep | 36.6° | 17.4° | 3.3° | 90 | 76% | 128 | 23.7 |
| Oct | 28.9° | 10.6° | -6.3° | 123.4 | 79% | 87 | 31.4 |
| Nov | 22.7° | 4.1° | -15.2° | 94.2 | 82% | 59 | 24.3 |
| Dec | 19.5° | -1.5° | -24.9° | 111.3 | 87% | 46 | 29.8 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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