Best year time to visit Williamstown

General weather information about Williamstown

Average annual temperature is 11.7 °C

Absolute maximum temperature: 32.1 °C

Absolute minimum temperature: -12.0 °C

Number of sunny days: 177 days

Number of rainy days: 175 days

Number of snow days: 13 days

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

Williamstown air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)16.619.418.826.029.131.431.831.132.128.819.916.4
Average daytime temperature (°C)5.09.39.317.121.425.728.126.524.417.710.98.4
Average temperature (°C)1.52.73.710.615.119.823.121.219.013.15.74.6
Average night temperature (°C)-1.5-1.8-0.45.09.414.218.416.614.39.21.61.7
Absolute minimum temperature (°C)-12.0-11.0-8.0-2.01.88.713.810.48.4-2.6-8.0-4.8

Williamstown monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.611.913.314.515.014.813.812.511.19.99.3
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)2.97.06.98.710.610.511.910.69.16.87.14.0
Precipitation (mm)131741267976124918116583045
Sunny days81811132114101319152213
Rainy days1891516101621181115818
Snow days515100000100

Williamstown - weather forecast by months

Williamstown weather in januaryWilliamstown weather in februaryWilliamstown weather in marchWilliamstown weather in aprilWilliamstown weather in mayWilliamstown weather in juneWilliamstown weather in julyWilliamstown weather in augustWilliamstown weather in septemberWilliamstown weather in octoberWilliamstown weather in novemberWilliamstown weather in december

Best time to visit Williamstown:

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

  • May — 10.6(h)
  • June — 10.5(h)
  • July — 11.9(h)
  • August — 10.6(h)

The largest precipitation sum in Williamstown is at

  • January — 131(mm)
  • March — 126(mm)
  • June — 124(mm)

    • Weather forecast in the closest to Williamstown admin centers

    Weather forecast in the closest towns to Williamstown

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    Frequently asked questions

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