Best year time to visit South Williamstown

General weather information about South Williamstown

Average annual temperature is 8.6 °C

Absolute maximum temperature: 30.7 °C

Absolute minimum temperature: -29.5 °C

Number of sunny days: 120 days

Number of rainy days: 208 days

Number of snow days: 37 days

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

South Williamstown air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.912.611.827.328.030.728.925.029.426.814.713.7
Average daytime temperature (°C)2.52.75.114.418.821.625.422.420.315.55.94.9
Average temperature (°C)-0.9-2.50.08.312.316.420.818.215.911.11.61.1
Average night temperature (°C)-4.0-7.5-4.23.36.512.017.014.812.57.4-1.7-1.5
Absolute minimum temperature (°C)-10.8-29.5-11.6-4.40.16.212.19.94.3-1.4-8.2-9.9

South Williamstown 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)9.510.611.913.414.615.315.013.912.511.19.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)3.45.96.48.411.69.110.49.37.86.56.13.9
Precipitation (mm)120571201025914026314816312654146
Sunny days891112176551312139
Rainy days151013181424262617191016
Snow days897000000076

South Williamstown - weather forecast by months

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

Best time to visit South Williamstown:

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

  • May — 11.6(h)
  • July — 10.4(h)
  • August — 9.3(h)

Months with the longest average daylight duration in South Williamstown:

  • June — 15.3(h)

The largest precipitation sum in South Williamstown is at

  • July — 263(mm)
  • September — 163(mm)

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    Frequently asked questions

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