Alaska climate by month
January highs across Alaska range from 1°F in Fairbanks to 41°F in Sitka; July highs from 60°F in Sitka to 73°F in Fairbanks. The most common best months across these cities are June, July, August.
Alaska weather month by month
Average of the 8 Alaska cities on this site, computed from NOAA's unrounded values (so it can differ by a degree from averaging the rounded city figures); individual cities differ, sometimes a lot.
| Month | High | Low | Wet days | Snow |
|---|---|---|---|---|
| January | 26°F | 15°F | 14 | 12.9 in |
| February | 31°F | 17°F | 12 | 11.5 in |
| March | 36°F | 20°F | 12 | 9.5 in |
| April | 47°F | 30°F | 12 | 3.1 in |
| May | 57°F | 40°F | 11 | 0.6 in |
| June | 63°F | 47°F | 13 | 0.01 in |
| July | 65°F | 51°F | 15 | 0.0 in |
| August | 63°F | 49°F | 16 | 0.0 in |
| September | 56°F | 43°F | 17 | 1.1 in |
| October | 44°F | 32°F | 17 | 3.8 in |
| November | 32°F | 22°F | 15 | 10.4 in |
| December | 28°F | 17°F | 16 | 15.1 in |
Regional differences
Warmest and coolest Alaska city each month
| Month | Warmest | Coolest | Best month for |
|---|---|---|---|
| January | Sitka 41°F | Fairbanks 1°F | – |
| February | Sitka 41°F | Fairbanks 12°F | – |
| March | Ketchikan 44°F | Fairbanks 25°F | – |
| April | Ketchikan 50°F | Denali Park 41°F | – |
| May | Fairbanks 62°F | Sitka 53°F | – |
| June | Fairbanks 72°F | Sitka 58°F | 6 cities |
| July | Fairbanks 73°F | Sitka 60°F | 8 cities |
| August | Fairbanks 66°F | Denali Park 61°F | 4 cities |
| September | Ketchikan 59°F | Denali Park 51°F | – |
| October | Ketchikan 51°F | Denali Park 34°F | – |
| November | Sitka 44°F | Fairbanks 12°F | – |
| December | Sitka 42°F | Fairbanks 4°F | – |
By normal daily high. "Best month for": how many of the 8 cities have it among their best months by our comfort score.
Frost and humidity across Alaska
- Earliest typical last frostSitka: Apr 12
- Latest typical last frostDenali Park: Jun 6
- Most muggy daysAnchorage: 0 a year
- Fewest muggy daysSkagway: 0 a year
All Alaska cities
| City | Jan high | Jul high | Wet days/yr | Snow/yr | Best months |
|---|---|---|---|---|---|
| Anchorage | 23°F | 66°F | 115 | 77.9 in | Jul |
| Denali Park | 10°F | 66°F | 123 | 76.7 in | Jun, Jul |
| Fairbanks | 1°F | 73°F | 107 | 64.6 in | Jun, Jul |
| Juneau | 33°F | 64°F | 230 | 87.6 in | Jun, Jul, Aug |
| Ketchikan | 40°F | 65°F | 233 | 34.8 in | Jul, Aug |
| Seward | 31°F | 62°F | 170 | 90.1 in | Jun, Jul, Aug |
| Sitka | 41°F | 60°F | 235 | – | Jun, Jul, Aug |
| Skagway | 31°F | 65°F | 151 | 44.9 in | Jun, Jul |