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Weather & Climate
Castleton, Vermont, United States
Overview
Climate data and monthly weather averages for Castleton.
Key Metrics
Annual Avg
6.6°C
Summer Avg
18.8°C
Winter Avg
-6.4°C
Record High
35.6°C
Record Low
-35°C
Annual Precipitation
1118.8 mm
Avg Humidity
85%
Summer Humidity
83%
Winter Humidity
92%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 15.1° | -7.9° | -35° | 65.1 | 93% | 48 | 31.6 |
| Feb | 20.3° | -7° | -31.6° | 66.9 | 93% | 66 | 35 |
| Mar | 23.3° | -1.8° | -27.8° | 77.2 | 86% | 109 | 31.8 |
| Apr | 27.5° | 5.5° | -15° | 87.3 | 79% | 138 | 27.9 |
| May | 29.1° | 12.5° | -3.8° | 98 | 80% | 164 | 21.6 |
| Jun | 34.9° | 17.3° | 0.1° | 122.7 | 82% | 172 | 18.4 |
| Jul | 35.6° | 20° | 6.9° | 113.8 | 83% | 182 | 15.8 |
| Aug | 32.7° | 19.1° | 6.2° | 103.2 | 83% | 162 | 20.9 |
| Sep | 31.8° | 15.2° | -0.1° | 91.8 | 82% | 125 | 19.3 |
| Oct | 26.5° | 8.3° | -7.2° | 116.3 | 84% | 79 | 27.9 |
| Nov | 19.9° | 1.9° | -17.4° | 80.1 | 86% | 52 | 22.1 |
| Dec | 18.9° | -4.2° | -30.7° | 96.4 | 91% | 37 | 28.8 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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