Cool
Average highs are around 11°C, so pack for cooler days.
Weather Guide
Unalaska, United States Average Monthly Weather
Weather score25Poor annual avg
Best months: June, May, April
Across the year, average daytime temperatures are around 6°C, sunshine averages 6.4h per day, and rainfall totals about 907mm. Sea temperatures average 6°C across the year.
Annual weather
Annual averages
Temp
6°C
Rain
907mm
Annual total
Sun
6.4h
Sea
6°C
Weather score
25
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 61mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Weather map
Compare Unalaska, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July11°C average high
July is one of Unalaska's hottest months, so shade and slower afternoons matter.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
July61mm average rain
July sits on the drier side of Unalaska's year, which helps with sightseeing and transfers.
Driest monthsJanuary to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July7 hours average sun
July is brighter than Unalaska's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMarch to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July9°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 9°C in this stretch, so swimming comfort is at its strongest.
Weather score
July28 weather score
July scores above Unalaska's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsFebruary to September
These months have the strongest weather score in the monthly averages.