Weather in Herajoki in May

General weather information about Herajoki

Average annual temperature is 4.1 °C

Absolute maximum temperature: 28.1 °C

Absolute minimum temperature: -18.5 °C

Number of sunny days: 110 days

Number of rainy days: 165 days

Number of snow days: 90 days

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

Herajoki air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)2.02.74.215.922.425.123.828.120.511.42.52.1
Average daytime temperature (°C)-2.6-3.3-1.97.314.119.218.320.216.13.6-2.4-5.9
Average temperature (°C)-4.2-5.4-4.51.49.614.915.617.213.62.0-4.0-7.2
Average night temperature (°C)-5.9-7.4-7.3-2.74.510.212.614.011.10.5-5.5-8.4
Absolute minimum temperature (°C)-18.5-15.7-14.4-9.4-3.02.59.010.07.3-6.0-17.9-15.5

Herajoki monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.016.019.020.020.017.014.011.08.05.0
Daylight mean duration (h)6.08.711.815.018.020.119.016.113.09.96.84.9
Daylight minimum duration (h)4.07.010.013.016.019.017.014.011.08.05.04.0
Sunshine mean duration (h)0.61.84.810.812.614.59.210.35.92.80.10.2
Precipitation (mm)762584243799210103132967147
Sunny days11992112127631046
Rainy days6269161824252717114
Snow days14171603000041521

Herajoki - weather forecast by months

Herajoki weather in januaryHerajoki weather in februaryHerajoki weather in marchHerajoki weather in aprilHerajoki weather in mayHerajoki weather in juneHerajoki weather in julyHerajoki weather in augustHerajoki weather in septemberHerajoki weather in octoberHerajoki weather in novemberHerajoki weather in december

Best time to visit Herajoki:

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

  • April — 10.8(h)
  • May — 12.6(h)
  • June — 14.5(h)
  • July — 9.2(h)
  • August — 10.3(h)

Months with the longest average daylight duration in Herajoki:

  • May — 18.0(h)
  • June — 20.1(h)
  • July — 19.0(h)
  • August — 16.1(h)

The largest precipitation sum in Herajoki is at

  • July — 210(mm)
  • September — 132(mm)

    • Weather forecast in the closest to Herajoki admin centers

    Weather forecast in the closest towns to Herajoki

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    Frequently asked questions

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