Best year time to visit South Portland

General weather information about South Portland

Average annual temperature is 9.6 °C

Absolute maximum temperature: 31.7 °C

Absolute minimum temperature: -27.9 °C

Number of sunny days: 161 days

Number of rainy days: 186 days

Number of snow days: 18 days

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* Weather data for South Portland United States is based on climate observations for 2026 year

South Portland air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.412.911.723.729.727.631.428.831.729.217.713.8
Average daytime temperature (°C)4.02.85.911.519.020.026.824.523.117.87.96.1
Average temperature (°C)0.2-2.61.77.413.316.022.219.918.212.93.41.9
Average night temperature (°C)-3.4-7.1-2.13.88.412.618.415.914.49.1-0.2-1.3
Absolute minimum temperature (°C)-12.8-27.9-7.4-3.92.47.014.212.77.60.6-5.8-8.2

South Portland monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.410.511.913.414.715.415.113.912.511.09.79.0
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)4.36.67.67.511.68.39.49.88.57.06.84.9
Precipitation (mm)16839891041171852251151008465161
Sunny days101418121974917132216
Rainy days1661018122327221318813
Snow days583000000002

South Portland - weather forecast by months

South Portland weather in januarySouth Portland weather in februarySouth Portland weather in marchSouth Portland weather in aprilSouth Portland weather in maySouth Portland weather in juneSouth Portland weather in julySouth Portland weather in augustSouth Portland weather in septemberSouth Portland weather in octoberSouth Portland weather in novemberSouth Portland weather in december

Best time to visit South Portland:

The best time to visit South Portland during the most sunny months:

  • May — 11.6(h)
  • August — 9.8(h)

Months with the longest average daylight duration in South Portland:

  • June — 15.4(h)

The largest precipitation sum in South Portland is at

  • January — 168(mm)
  • June — 185(mm)
  • July — 225(mm)
  • December — 161(mm)

    • Weather forecast in the closest to South Portland admin centers

    Weather forecast in the closest towns to South Portland

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    MapTrains schedule
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    Frequently asked questions

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