Best year time to visit Charleston

General weather information about Charleston

Average annual temperature is 6.7 °C

Absolute maximum temperature: 32.2 °C

Absolute minimum temperature: -30.8 °C

Number of sunny days: 142 days

Number of rainy days: 178 days

Number of snow days: 45 days

Look at detailed online map of Charleston

* Weather data for Charleston Canada is based on climate observations for 2026 year

Charleston air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)5.77.56.418.330.532.231.325.328.824.311.512.8
Average daytime temperature (°C)-1.1-3.82.410.417.020.426.521.921.915.63.71.6
Average temperature (°C)-5.2-9.4-2.04.710.815.821.617.616.411.1-0.5-2.1
Average night temperature (°C)-8.7-14.5-5.8-0.55.311.717.613.812.37.6-3.6-5.1
Absolute minimum temperature (°C)-20.2-30.8-14.2-11.70.75.712.38.85.3-1.1-10.5-13.3

Charleston monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.110.311.913.615.015.715.414.112.610.99.48.7
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)3.26.96.98.09.76.710.38.68.35.65.54.3
Precipitation (mm)1653866469717018618510910075125
Sunny days1112111215631017121518
Rainy days97816162428211318108
Snow days11912200000155

Charleston - weather forecast by months

Charleston weather in januaryCharleston weather in februaryCharleston weather in marchCharleston weather in aprilCharleston weather in mayCharleston weather in juneCharleston weather in julyCharleston weather in augustCharleston weather in septemberCharleston weather in octoberCharleston weather in novemberCharleston weather in december

Best time to visit Charleston:

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

  • May — 9.7(h)
  • July — 10.3(h)

Months with the longest average daylight duration in Charleston:

  • June — 15.7(h)
  • July — 15.4(h)

The largest precipitation sum in Charleston is at

  • January — 165(mm)
  • June — 170(mm)
  • July — 186(mm)
  • August — 185(mm)

    • Weather forecast in the closest to Charleston admin centers

    Weather forecast in the closest towns to Charleston

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    Frequently asked questions

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