Cool
Average highs are around 1°C, so pack for cooler days.
December verdict
Hanko, Finland in December
Weather score17Poor
Poor for holiday weather
Average highs are around 1°C, so pack for cooler days. Sunshine averages 0.6h per day, so this is not one of the brighter months. Rainfall averages 48mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
1°C
Rain
48mm
Sun
0.6h
Sea
5°C
Weather score
17
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 48mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0.6h 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 Hanko, Finland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December1°C average high
December is on the cooler side of Hanko's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
December48mm average rain
December sits near Hanko's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to June and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December0.6 hours average sun
December is one of Hanko's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMay to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December5°C average sea
December is below Hanko's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 16°C in this stretch, so swimming comfort is at its strongest.
Weather score
December17 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 monthsJune to August
These months have the strongest weather score in the monthly averages.
