Best year time to visit Koukku

General weather information about Koukku

Average annual temperature is 4.9 °C

Absolute maximum temperature: 29.4 °C

Absolute minimum temperature: -16.7 °C

Number of sunny days: 142 days

Number of rainy days: 161 days

Number of snow days: 62 days

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

Koukku air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)3.45.54.815.322.429.224.129.421.813.56.04.4
Average daytime temperature (°C)-0.8-0.8-0.19.114.520.519.819.617.35.3-0.7-3.8
Average temperature (°C)-2.6-3.0-3.52.99.415.715.816.213.72.6-2.5-6.0
Average night temperature (°C)-4.6-5.9-7.3-2.43.69.811.712.710.40.1-4.7-8.5
Absolute minimum temperature (°C)-14.9-13.6-15.8-13.9-3.61.99.49.43.3-6.9-16.7-16.5

Koukku monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.016.018.019.019.017.014.011.08.05.0
Daylight mean duration (h)6.38.911.814.817.719.518.615.912.910.07.15.4
Daylight minimum duration (h)5.07.010.013.016.018.017.014.011.08.05.05.0
Sunshine mean duration (h)0.82.75.610.512.815.012.09.06.94.60.70.2
Precipitation (mm)693082404230152138121849429
Sunny days11168211817358141110
Rainy days93109121328262214114
Snow days119130100003817

Koukku - weather forecast by months

Koukku weather in januaryKoukku weather in februaryKoukku weather in marchKoukku weather in aprilKoukku weather in mayKoukku weather in juneKoukku weather in julyKoukku weather in augustKoukku weather in septemberKoukku weather in octoberKoukku weather in novemberKoukku weather in december

Best time to visit Koukku:

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

  • April — 10.5(h)
  • May — 12.8(h)
  • June — 15.0(h)
  • July — 12.0(h)
  • August — 9.0(h)

Months with the longest average daylight duration in Koukku:

  • May — 17.7(h)
  • June — 19.5(h)
  • July — 18.6(h)
  • August — 15.9(h)

The largest precipitation sum in Koukku is at

  • July — 152(mm)
  • August — 138(mm)
  • September — 121(mm)

    • Weather forecast in the closest to Koukku admin centers

    Weather forecast in the closest towns to Koukku

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    Frequently asked questions

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