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Weather & Climate
Sitka City and Borough, Alaska, United States
Overview
Climate data and monthly weather averages for Sitka City and Borough.
Key Metrics
Annual Avg
5.4°C
Summer Avg
11.8°C
Winter Avg
0°C
Record High
24.7°C
Record Low
-18.4°C
Annual Precipitation
2762.4 mm
Avg Humidity
89%
Summer Humidity
88%
Winter Humidity
91%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 9.1° | -0.1° | -18.3° | 291.7 | 92% | 12 | 71.8 |
| Feb | 7.5° | -0.3° | -18.4° | 192.9 | 90% | 30 | 70.6 |
| Mar | 14.5° | 0.3° | -18.3° | 189.4 | 87% | 69 | 73.9 |
| Apr | 17.8° | 3.5° | -8.1° | 160.5 | 86% | 107 | 63.1 |
| May | 20.8° | 7.5° | -2.7° | 142.6 | 85% | 138 | 55.5 |
| Jun | 24.7° | 10.3° | 2.6° | 132.3 | 86% | 135 | 51.7 |
| Jul | 24.6° | 12.4° | 6.2° | 164.9 | 88% | 120 | 45 |
| Aug | 23.9° | 12.7° | 5.8° | 221 | 89% | 102 | 49.1 |
| Sep | 20.2° | 10° | 1.9° | 310.8 | 89% | 66 | 69.2 |
| Oct | 14.9° | 6° | -5.8° | 339.1 | 90% | 36 | 68.1 |
| Nov | 10.5° | 2.1° | -17.9° | 306.6 | 90% | 15 | 71.7 |
| Dec | 8.2° | 0.5° | -14.2° | 310.6 | 91% | 8 | 77.6 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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