Cool
Average highs are around 3°C, so pack for cooler days.
December verdict
Unalaska, United States in December
Weather score19Poor
Poor for holiday weather
Average highs are around 3°C, so pack for cooler days. Sunshine averages 4.7h per day, so this is not one of the brighter months. Rainfall averages 94mm, so some wet days are possible.
December weather
Monthly averages
Temp
3°C
Rain
94mm
Sun
4.7h
Sea
5°C
Weather score
19
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 94mm, so some wet days are possible.
Limited sun
Sunshine averages 4.7h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 5°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
December3°C average high
December is on the cooler side of Unalaska's year, useful if you prefer less intense daytime heat.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
December94mm average rain
December is wetter than Unalaska's yearly average, so flexible plans matter more.
Driest monthsJanuary to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December4.7 hours average sun
December is one of Unalaska's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMarch to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December5°C average sea
December is below Unalaska's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 9°C in this stretch, so swimming comfort is at its strongest.
Weather score
December19 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsFebruary to September
These months have the strongest weather score in the monthly averages.