Best year time to visit Williamstown

General weather information about Williamstown

Average annual temperature is 12.7 °C

Absolute maximum temperature: 33.2 °C

Absolute minimum temperature: -11.5 °C

Number of sunny days: 146 days

Number of rainy days: 210 days

Number of snow days: 9 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)17.921.822.128.929.833.232.431.832.627.219.717.3
Average daytime temperature (°C)8.711.911.519.422.326.328.827.324.518.612.19.7
Average temperature (°C)4.15.25.412.415.719.923.221.919.013.66.55.3
Average night temperature (°C)0.90.40.86.69.614.218.817.314.59.62.22.0
Absolute minimum temperature (°C)-6.0-11.5-7.8-1.22.59.115.111.99.21.7-6.8-4.9

Williamstown monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.014.014.013.011.010.09.0
Daylight mean duration (h)9.710.712.013.314.415.014.713.712.511.110.09.4
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)3.16.86.68.710.311.110.910.48.76.76.84.4
Precipitation (mm)113671004686127138103591045067
Sunny days913121418116712112112
Rainy days19131716131925241820818
Snow days322000000011

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 — 10.3(h)
  • June — 11.1(h)
  • July — 10.9(h)
  • August — 10.4(h)

The largest precipitation sum in Williamstown is at

  • January — 113(mm)
  • June — 127(mm)
  • July — 138(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.