Best year time to visit Heinäjoki

General weather information about Heinäjoki

Average annual temperature is 5.6 °C

Absolute maximum temperature: 29.6 °C

Absolute minimum temperature: -17.2 °C

Number of sunny days: 122 days

Number of rainy days: 180 days

Number of snow days: 63 days

Look at detailed online map of Heinäjoki

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

Heinäjoki air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)3.15.85.918.223.828.725.429.621.514.17.43.7
Average daytime temperature (°C)-0.7-0.80.810.415.421.520.520.517.95.80.5-3.6
Average temperature (°C)-2.6-3.3-3.04.610.416.516.516.614.43.4-0.9-5.5
Average night temperature (°C)-4.7-7.3-7.5-1.24.610.312.212.811.11.1-2.9-7.8
Absolute minimum temperature (°C)-15.8-16.7-17.2-10.6-2.42.610.010.06.2-5.0-14.0-14.3

Heinäjoki 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)6.69.011.814.717.419.118.215.712.910.17.45.7
Daylight minimum duration (h)5.07.010.013.016.018.017.014.011.08.06.05.0
Sunshine mean duration (h)0.72.45.211.512.215.012.48.46.94.10.50.2
Precipitation (mm)722769193949106123441018035
Sunny days9139211216588885
Rainy days124109161426232221149
Snow days1011120300002817

Heinäjoki - weather forecast by months

Heinäjoki weather in januaryHeinäjoki weather in februaryHeinäjoki weather in marchHeinäjoki weather in aprilHeinäjoki weather in mayHeinäjoki weather in juneHeinäjoki weather in julyHeinäjoki weather in augustHeinäjoki weather in septemberHeinäjoki weather in octoberHeinäjoki weather in novemberHeinäjoki weather in december

Best time to visit Heinäjoki:

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

  • April — 11.5(h)
  • May — 12.2(h)
  • June — 15.0(h)
  • July — 12.4(h)
  • August — 8.4(h)

Months with the longest average daylight duration in Heinäjoki:

  • May — 17.4(h)
  • June — 19.1(h)
  • July — 18.2(h)
  • August — 15.7(h)

The largest precipitation sum in Heinäjoki is at

  • July — 106(mm)
  • August — 123(mm)
  • October — 101(mm)

    • Weather forecast in the closest to Heinäjoki admin centers

    Weather forecast in the closest towns to Heinäjoki

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    Frequently asked questions

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