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Weather & Climate
Sullivan County, New York, United States
Overview
Climate data and monthly weather averages for Sullivan County.
Key Metrics
Annual Avg
8.7°C
Summer Avg
20.6°C
Winter Avg
-3.5°C
Record High
38.5°C
Record Low
-29.6°C
Annual Precipitation
1204.3 mm
Avg Humidity
81%
Summer Humidity
77%
Winter Humidity
89%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.2° | -4.9° | -29.6° | 72.9 | 90% | 55 | 32.7 |
| Feb | 21.3° | -3.9° | -28.3° | 70.3 | 89% | 73 | 33.7 |
| Mar | 21.8° | 0.7° | -21.6° | 86.2 | 84% | 112 | 36.7 |
| Apr | 30.9° | 7.5° | -8° | 95.1 | 79% | 139 | 27.6 |
| May | 31.8° | 14° | -2.5° | 102.6 | 79% | 164 | 20.7 |
| Jun | 32.8° | 18.8° | 2.3° | 124.5 | 80% | 173 | 18.6 |
| Jul | 38.5° | 21.8° | 7.6° | 112.2 | 75% | 184 | 16.1 |
| Aug | 37.8° | 21.1° | 7.8° | 120.6 | 75% | 159 | 24.7 |
| Sep | 34.8° | 17.4° | 2.2° | 117 | 74% | 126 | 21.9 |
| Oct | 30.4° | 10.3° | -6.7° | 121.5 | 79% | 87 | 31.3 |
| Nov | 23.8° | 3.8° | -15.1° | 82.5 | 83% | 59 | 25.1 |
| Dec | 19.3° | -1.6° | -20.7° | 98.9 | 89% | 44 | 30.7 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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