Cool
Average highs are around 18°C, so pack for cooler days.
Weather Guide
Kalajoki, Finland Average Monthly Weather
Weather score27Poor annual avg
Best months: July, June, May
Across the year, average daytime temperatures are around 6°C, sunshine averages 4h per day, and rainfall totals about 531mm. Sea temperatures average 6°C across the year.
Annual weather
Annual averages
Temp
6°C
Rain
531mm
Annual total
Sun
4h
Sea
6°C
Weather score
27
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 69mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 16°C, so the water can feel cool.
Map
Weather map
Compare Kalajoki, Finland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August18°C average high
August is one of Kalajoki's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
August69mm average rain
August is one of Kalajoki's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to June and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.2 hours average sun
August sits close to Kalajoki'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.
Sea temperature
August16°C average sea
August is one of Kalajoki's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
August34 weather score
August sits close to Kalajoki'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.