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Weather & Climate
San Juan County, Utah, United States
Overview
Climate data and monthly weather averages for San Juan County.
Key Metrics
Annual Avg
12°C
Summer Avg
24.9°C
Winter Avg
0°C
Record High
40.5°C
Record Low
-19.1°C
Annual Precipitation
220.5 mm
Avg Humidity
43%
Summer Humidity
30%
Winter Humidity
60%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 16.2° | -0.6° | -18.1° | 20.5 | 62% | 88 | 49.3 |
| Feb | 18.5° | 1.4° | -19.1° | 19 | 57% | 104 | 60.8 |
| Mar | 26.4° | 6.3° | -9.5° | 15.2 | 47% | 165 | 61.4 |
| Apr | 29.7° | 10.6° | -6.4° | 12.6 | 39% | 200 | 57.6 |
| May | 36.8° | 16.4° | -4.3° | 13.6 | 33% | 236 | 57.3 |
| Jun | 39.4° | 23.4° | 2.6° | 7.8 | 23% | 252 | 53.6 |
| Jul | 40.5° | 26.6° | 10.9° | 23.6 | 32% | 234 | 43.1 |
| Aug | 38.7° | 24.6° | 10.2° | 24.2 | 36% | 208 | 43.5 |
| Sep | 37.5° | 19.9° | 0.3° | 25.5 | 36% | 174 | 53.1 |
| Oct | 31.5° | 11.8° | -10.3° | 23.3 | 42% | 138 | 54.5 |
| Nov | 23.7° | 4.7° | -11.5° | 14.4 | 49% | 97 | 52.3 |
| Dec | 16.1° | -0.7° | -15.7° | 20.8 | 61% | 76 | 52.3 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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