Best year time to visit Kostamo

General weather information about Kostamo

Average annual temperature is 4.2 °C

Absolute maximum temperature: 28.4 °C

Absolute minimum temperature: -17.8 °C

Number of sunny days: 109 days

Number of rainy days: 180 days

Number of snow days: 76 days

Look at detailed online map of Kostamo

* Weather data for Kostamo Finland is based on climate observations for 2026 year

Kostamo air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)1.92.53.818.622.326.624.428.421.311.72.91.9
Average daytime temperature (°C)-2.6-3.2-1.67.614.619.719.120.416.84.1-2.2-6.0
Average temperature (°C)-4.3-5.3-4.21.89.815.015.716.913.71.9-3.8-7.6
Average night temperature (°C)-6.0-7.4-7.0-2.84.69.512.113.210.80.0-5.5-9.0
Absolute minimum temperature (°C)-16.0-17.8-15.6-9.9-2.81.07.97.77.1-7.8-17.6-15.7

Kostamo monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.016.019.019.019.017.014.011.08.05.0
Daylight mean duration (h)6.28.811.814.917.819.718.816.013.09.97.05.2
Daylight minimum duration (h)5.07.010.013.016.019.017.014.011.08.05.05.0
Sunshine mean duration (h)0.52.55.311.212.715.010.710.56.93.90.30.2
Precipitation (mm)772985275481209891421067153
Sunny days11882211124561057
Rainy days11488191827262418134
Snow days9161501000031220

Kostamo - weather forecast by months

Kostamo weather in januaryKostamo weather in februaryKostamo weather in marchKostamo weather in aprilKostamo weather in mayKostamo weather in juneKostamo weather in julyKostamo weather in augustKostamo weather in septemberKostamo weather in octoberKostamo weather in novemberKostamo weather in december

Best time to visit Kostamo:

The best time to visit Kostamo during the most sunny months:

  • April — 11.2(h)
  • May — 12.7(h)
  • June — 15.0(h)
  • July — 10.7(h)
  • August — 10.5(h)

Months with the longest average daylight duration in Kostamo:

  • May — 17.8(h)
  • June — 19.7(h)
  • July — 18.8(h)
  • August — 16.0(h)

The largest precipitation sum in Kostamo is at

  • July — 209(mm)
  • September — 142(mm)

    • Weather forecast in the closest to Kostamo admin centers

    Weather forecast in the closest towns to Kostamo

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    Frequently asked questions

    When is the best time to visit Kostamo?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Kostamo.
    What is the weather like in Kostamo?
    See average temperature, rainfall and daylight hours for Kostamo by month in the table above.
    How many sunny days does Kostamo have?
    The monthly weather statistics above show sunshine and rainfall patterns for Kostamo throughout the year.