Best year time to visit Koukku

General weather information about Koukku

Average annual temperature is 5.3 °C

Absolute maximum temperature: 29.4 °C

Absolute minimum temperature: -17.1 °C

Number of sunny days: 122 days

Number of rainy days: 176 days

Number of snow days: 67 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)2.84.56.118.421.526.523.529.421.814.16.62.8
Average daytime temperature (°C)-1.5-2.0-0.19.315.020.520.120.917.55.40.0-4.3
Average temperature (°C)-3.5-4.2-3.13.710.416.016.717.414.33.3-1.6-6.1
Average night temperature (°C)-5.5-7.0-6.4-1.65.210.513.013.811.21.3-3.1-7.9
Absolute minimum temperature (°C)-14.9-17.1-14.4-13.7-1.82.510.010.96.9-5.7-11.3-13.9

Koukku monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.016.018.019.019.017.014.011.08.06.0
Daylight mean duration (h)6.69.011.814.717.419.118.315.812.910.17.35.7
Daylight minimum duration (h)5.07.010.013.016.018.017.014.011.08.06.05.0
Sunshine mean duration (h)0.71.84.711.712.915.112.110.17.24.00.20.2
Precipitation (mm)79227928382913095901047056
Sunny days11116241414398976
Rainy days111126161628222220148
Snow days916130100002917

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 — 11.7(h)
  • May — 12.9(h)
  • June — 15.1(h)
  • July — 12.1(h)
  • August — 10.1(h)

Months with the longest average daylight duration in Koukku:

  • May — 17.4(h)
  • June — 19.1(h)
  • July — 18.3(h)
  • August — 15.8(h)

The largest precipitation sum in Koukku is at

  • July — 130(mm)
  • August — 95(mm)
  • September — 90(mm)
  • October — 104(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.