Best year time to visit Port Arthur

General weather information about Port Arthur

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

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

Port Arthur 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

Port Arthur 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

Port Arthur - weather forecast by months

Port Arthur weather in januaryPort Arthur weather in februaryPort Arthur weather in marchPort Arthur weather in aprilPort Arthur weather in mayPort Arthur weather in junePort Arthur weather in julyPort Arthur weather in augustPort Arthur weather in septemberPort Arthur weather in octoberPort Arthur weather in novemberPort Arthur weather in december

Best time to visit Port Arthur:

The best time to visit Port Arthur 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 Port Arthur:

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

The largest precipitation sum in Port Arthur is at

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

    • Weather forecast in the closest to Port Arthur admin centers

    Weather forecast in the closest towns to Port Arthur

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    Frequently asked questions

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