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Weather & Climate
Ketchikan Gateway Borough, Alaska, United States
Overview
Climate data and monthly weather averages for Ketchikan Gateway Borough.
Key Metrics
Annual Avg
5°C
Summer Avg
12.8°C
Winter Avg
-2.1°C
Record High
29.7°C
Record Low
-25.6°C
Annual Precipitation
3067.9 mm
Avg Humidity
89%
Summer Humidity
85%
Winter Humidity
94%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 7.1° | -1.9° | -25.6° | 345.7 | 95% | 15 | 37.6 |
| Feb | 6.3° | -2.2° | -19.3° | 210 | 93% | 35 | 35.1 |
| Mar | 14.6° | -0.4° | -20.3° | 234.7 | 91% | 70 | 34.2 |
| Apr | 19.9° | 3.2° | -11.7° | 198.9 | 86% | 107 | 41.2 |
| May | 23.4° | 8.1° | -5.3° | 157.2 | 82% | 139 | 27.7 |
| Jun | 29.4° | 11.4° | 3° | 159 | 83% | 137 | 31 |
| Jul | 29.7° | 13.5° | 6.3° | 184.5 | 85% | 129 | 25.3 |
| Aug | 28.1° | 13.6° | 6.3° | 242.7 | 87% | 112 | 29.8 |
| Sep | 23.9° | 10.4° | 1.6° | 311.4 | 89% | 73 | 42 |
| Oct | 18.8° | 5.6° | -8.6° | 364.6 | 91% | 42 | 42.7 |
| Nov | 10.6° | 0.5° | -19.9° | 340.5 | 94% | 17 | 41.5 |
| Dec | 7.8° | -2.2° | -19.5° | 318.7 | 95% | 11 | 36.4 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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