Best year time to visit Charlestown

General weather information about Charlestown

Average annual temperature is 13.3 °C

Absolute maximum temperature: 35.9 °C

Absolute minimum temperature: -10.6 °C

Number of sunny days: 181 days

Number of rainy days: 181 days

Number of snow days: 3 days

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

Charlestown air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)18.518.718.829.929.935.334.031.835.928.221.517.1
Average daytime temperature (°C)8.99.711.119.923.027.130.728.725.220.111.99.3
Average temperature (°C)4.94.55.413.416.020.524.723.219.814.56.65.1
Average night temperature (°C)1.70.20.58.19.314.820.018.715.610.02.31.5
Absolute minimum temperature (°C)-4.7-10.6-5.2-0.13.410.115.914.19.84.0-4.9-4.3

Charlestown 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)4.76.87.49.111.610.711.610.28.08.47.74.7
Precipitation (mm)97439314331114144571744263181
Sunny days131613152011101313202017
Rainy days18101815111921181711914
Snow days020000000010

Charlestown - weather forecast by months

Charlestown weather in januaryCharlestown weather in februaryCharlestown weather in marchCharlestown weather in aprilCharlestown weather in mayCharlestown weather in juneCharlestown weather in julyCharlestown weather in augustCharlestown weather in septemberCharlestown weather in octoberCharlestown weather in novemberCharlestown weather in december

Best time to visit Charlestown:

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

  • May — 11.6(h)
  • June — 10.7(h)
  • July — 11.6(h)

The largest precipitation sum in Charlestown is at

  • April — 143(mm)
  • July — 144(mm)
  • September — 174(mm)
  • December — 181(mm)

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    Frequently asked questions

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