Unalaska weather by month & the best time to visit
🇺🇸 United States · seaside town · oceanic / maritime climate
Unalaska is short on reliable sunshine. Its best month is August (Score 22/100) — for stronger sun, try one of the nearby alternatives below.
Jump to: month-by-month table · sea temperature · nearby alternatives · embed this data
- Sun hours / year
- 1,055
- Sunniest month
- August
- Peak score
- 22/100
- Rain / year
- 1,313 mm
- Snow / year
- ≈1 m
- Midday UV at peak
- 4 (moderate)
- Sea at warmest
- 9°C / 48°F
- Population
- 4k
- Elevation
- Sea level
When is the best time to visit Unalaska?
Unalaska never gets truly sunny weather: August is as good as it gets at 22/100, and January is the low point (0/100). If sunshine is the point of the trip, the nearby alternatives below do better.
How sunny is Unalaska?
Unalaska isn't a sunny place by world standards: about 1,055 hours of sunshine a year. August (22/100) is noticeably better than January (0). It ranks #574 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,313 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 2° / 36°F | 0° / 32°F | 120 mm | 0 | 4° / 39°F |
| February | 0 | 3° / 37°F | 1° / 34°F | 108 mm | 1 | 3° / 37°F |
| March | 0 | 2° / 36°F | 0° / 32°F | 80 mm | 1 | 3° / 37°F |
| April | 0 | 4° / 39°F | 2° / 36°F | 81 mm | 2 | 3° / 37°F |
| May | 0 | 6° / 43°F | 4° / 39°F | 100 mm | 3 | 4° / 39°F |
| June | 6 | 9° / 48°F | 7° / 45°F | 93 mm | 4 | 6° / 43°F |
| July | 17 | 11° / 52°F | 9° / 48°F | 93 mm | 4 | 9° / 48°F |
| August | 22 | 12° / 54°F | 10° / 50°F | 94 mm | 4 | 9° / 48°F |
| September | 10 | 10° / 50°F | 8° / 46°F | 117 mm | 2 | 8° / 46°F |
| October | 0 | 7° / 45°F | 6° / 43°F | 140 mm | 1 | 7° / 45°F |
| November | 0 | 5° / 41°F | 3° / 37°F | 119 mm | 0 | 6° / 43°F |
| December | 0 | 3° / 37°F | 1° / 34°F | 168 mm | 0 | 5° / 41°F |
Sea temperature in Unalaska by month
The sea off Unalaska is warmest in July at around 9°C / 48°F, and coolest in February at 3°C / 37°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Unalaska on the interactive sunshine globe →
Nearby places for sunshine
- Bethel United States · 815 km · best in Jul · 1,745 h sun/yr
- Kodiak United States · 974 km · best in Jul · 1,335 h sun/yr
- Nome United States · 1,182 km · best in Jul · 1,904 h sun/yr
- Anchorage United States · 1,271 km · best in Jul · 1,720 h sun/yr
- Kotzebue United States · 1,459 km · best in Jul · 2,092 h sun/yr
- Fairbanks United States · 1,599 km · best in Jun · 2,066 h sun/yr
Nearest destinations
- Akutan United States · 67 km · 985 h sun/yr · best in Aug
- Nikolski United States · 186 km · 1,066 h sun/yr · best in Aug
- False Pass United States · 229 km · 1,277 h sun/yr · best in Aug
- Cold Bay United States · 286 km · 1,010 h sun/yr · best in Aug
- King Cove United States · 308 km · 1,010 h sun/yr · best in Aug
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