Cool
Average highs are around 2°C, so pack for cooler days.
December verdict
Portland, Maine, United States in December
Weather score21Poor
Poor for holiday weather
Average highs are around 2°C, so pack for cooler days. Sunshine averages 4.3h per day, so this is not one of the brighter months. Rainfall averages 117mm, so some wet days are possible.
December weather
Monthly averages
Temp
2°C
Rain
117mm
Sun
4.3h
Sea
7°C
Weather score
21
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 117mm, so some wet days are possible.
Limited sun
Sunshine averages 4.3h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 7°C, so the water can feel cool.
Map
Weather map
Compare Portland, Maine, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December2°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December117mm average rain
December is wetter than Portland's yearly average, so flexible plans matter more.
Driest monthsJanuary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December4.3 hours average sun
December is one of Portland's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December7°C average sea
December is below Portland's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
December21 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 monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels in Portland, Maine, United States
Marriott
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