Weather in Iso Haarla in December

General weather information about Iso Haarla

Average annual temperature is 6.3 °C

Absolute maximum temperature: 30.5 °C

Absolute minimum temperature: -17.4 °C

Number of sunny days: 138 days

Number of rainy days: 181 days

Number of snow days: 46 days

Look at detailed online map of Iso Haarla

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

Iso Haarla air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)4.17.27.316.324.829.524.830.523.315.38.44.6
Average daytime temperature (°C)1.00.81.310.315.122.120.520.417.97.51.7-2.4
Average temperature (°C)-0.9-1.5-2.44.610.116.916.817.014.94.8-0.2-4.3
Average night temperature (°C)-2.9-4.5-6.9-1.33.910.212.813.811.42.2-2.5-6.6
Absolute minimum temperature (°C)-17.2-13.2-17.3-13.6-2.82.710.910.85.0-4.8-11.5-17.4

Iso Haarla monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.015.018.019.018.016.014.011.08.06.0
Daylight mean duration (h)6.79.111.814.617.318.918.115.612.910.17.55.9
Daylight minimum duration (h)5.07.010.013.016.018.017.014.011.08.06.05.0
Sunshine mean duration (h)1.43.45.910.913.315.713.59.38.05.21.40.5
Precipitation (mm)783886213242116220601409436
Sunny days1113122121175210989
Rainy days16789101326292021148
Snow days48110000001814

Iso Haarla - weather forecast by months

Iso Haarla weather in januaryIso Haarla weather in februaryIso Haarla weather in marchIso Haarla weather in aprilIso Haarla weather in mayIso Haarla weather in juneIso Haarla weather in julyIso Haarla weather in augustIso Haarla weather in septemberIso Haarla weather in octoberIso Haarla weather in novemberIso Haarla weather in december

Best time to visit Iso Haarla:

The best time to visit Iso Haarla during the most sunny months:

  • April — 10.9(h)
  • May — 13.3(h)
  • June — 15.7(h)
  • July — 13.5(h)
  • August — 9.3(h)

Months with the longest average daylight duration in Iso Haarla:

  • May — 17.3(h)
  • June — 18.9(h)
  • July — 18.1(h)
  • August — 15.6(h)

The largest precipitation sum in Iso Haarla is at

  • July — 116(mm)
  • August — 220(mm)
  • October — 140(mm)

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    Frequently asked questions

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