Cool
Average highs are around 16°C, so pack for cooler days.
Weather Guide
Posio, Finland Average Monthly Weather
Weather score28Poor annual avg
Best months: July, June, May
Across the year, average daytime temperatures are around 3°C, sunshine averages 3.6h per day, and rainfall totals about 581mm.
Annual weather
Annual averages
Temp
3°C
Rain
581mm
Annual total
Sun
3.6h
Weather score
28
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 75mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Map
Weather map
Compare Posio, Finland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August16°C average high
August sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
August75mm average rain
August is one of Posio's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to June and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August5.4 hours average sun
August sits close to Posio's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to July
This stretch has the strongest sunshine in the monthly averages.
Weather score
August31 weather score
August sits close to Posio's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to July
These months have the strongest weather score in the monthly averages.