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Weather & Climate
Wheaton, Maryland, United States
Overview
Climate data and monthly weather averages for Wheaton.
Key Metrics
Annual Avg
13.1°C
Summer Avg
24.6°C
Winter Avg
1.4°C
Record High
40.2°C
Record Low
-18.7°C
Annual Precipitation
1152.7 mm
Avg Humidity
77%
Summer Humidity
71%
Winter Humidity
82%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 20.6° | 0.1° | -16.5° | 67 | 82% | 61 | 56.4 |
| Feb | 23.4° | 1.3° | -18.7° | 69.7 | 80% | 79 | 63 |
| Mar | 25.1° | 5.8° | -16.8° | 83.7 | 79% | 117 | 64.8 |
| Apr | 33° | 12.2° | -3.8° | 92.1 | 76% | 146 | 63.3 |
| May | 32.9° | 17.6° | 0.4° | 109.4 | 78% | 168 | 47.8 |
| Jun | 36.3° | 22.8° | 7.7° | 118.2 | 74% | 182 | 43.5 |
| Jul | 40.2° | 25.8° | 12.6° | 116.3 | 69% | 186 | 40.3 |
| Aug | 37.8° | 25.1° | 13.2° | 109.4 | 70% | 164 | 62.7 |
| Sep | 36.3° | 21.3° | 6.6° | 107.1 | 72% | 129 | 66.6 |
| Oct | 35.6° | 14.4° | -1.1° | 104.8 | 76% | 98 | 61.5 |
| Nov | 25.3° | 7.8° | -5.7° | 80.1 | 79% | 68 | 50.1 |
| Dec | 22.4° | 2.8° | -11.2° | 94.9 | 83% | 53 | 59.1 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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