Weather in Herttua in September

General weather information about Herttua

Average annual temperature is 3.1 °C

Absolute maximum temperature: 27.0 °C

Absolute minimum temperature: -24.4 °C

Number of sunny days: 115 days

Number of rainy days: 153 days

Number of snow days: 97 days

Look at detailed online map of Herttua

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

Herttua air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)2.81.92.714.222.525.024.327.021.411.01.81.8
Average daytime temperature (°C)-3.1-3.9-3.06.313.918.317.619.815.32.5-3.6-6.2
Average temperature (°C)-4.9-6.3-6.40.59.514.014.616.112.40.5-5.3-7.8
Average night temperature (°C)-7.0-8.7-10.2-4.54.09.011.112.09.2-1.4-7.2-9.3
Absolute minimum temperature (°C)-22.7-18.6-24.4-11.8-4.20.37.06.95.2-7.6-17.2-15.3

Herttua monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)7.010.013.016.019.021.020.017.014.011.08.05.0
Daylight mean duration (h)5.68.611.815.118.420.719.516.313.09.86.64.5
Daylight minimum duration (h)4.07.010.013.016.020.018.014.011.08.05.04.0
Sunshine mean duration (h)1.01.74.910.512.014.18.610.45.32.60.10.2
Precipitation (mm)722264505013820985106776149
Sunny days91213201394841193
Rainy days711816212723261643
Snow days15151722000041725

Herttua - weather forecast by months

Herttua weather in januaryHerttua weather in februaryHerttua weather in marchHerttua weather in aprilHerttua weather in mayHerttua weather in juneHerttua weather in julyHerttua weather in augustHerttua weather in septemberHerttua weather in octoberHerttua weather in novemberHerttua weather in december

Best time to visit Herttua:

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

  • April — 10.5(h)
  • May — 12.0(h)
  • June — 14.1(h)
  • July — 8.6(h)
  • August — 10.4(h)

Months with the longest average daylight duration in Herttua:

  • May — 18.4(h)
  • June — 20.7(h)
  • July — 19.5(h)
  • August — 16.3(h)

The largest precipitation sum in Herttua is at

  • June — 138(mm)
  • July — 209(mm)
  • September — 106(mm)

    • Weather forecast in the closest to Herttua admin centers

    Weather forecast in the closest towns to Herttua

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    See also
    MapTrains schedule
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    Frequently asked questions

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