The best times to visit Charleston for ideal weather are

April 23rd to May 20th

or

September 3rd to October 28th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Charleston Travel Guide

  • Safety
  • The busiest and least popular months
  • Overall travel experience by time of year
  • Weather in Charleston

    Temperature

    Average temperatures in Charleston vary somewhat and are temperate for about half of the year. The area is in the top 45 percent of tourist destinations for pleasant weather. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Charleston, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 64.7°F (18.2°C) with temperatures rarely dropping below 46.9°F (8.3°C) at night.

    Charleston Temperatures (Fahrenheit)

    Key
    High
    Average
    Low

    Charleston Temperatures (Celsius)

    Key
    High
    Average
    Low

    “Feels-Like” Temperatures

    The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

    Charleston Perceived Temperature (F)

    Key
    High
    Average
    Low

    Charleston Perceived Temperature (C)

    Key
    High
    Average
    Low

     

    Average Charleston Temperatures by Month

    Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

    Show Fahrenheit

    Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
    Jan 44.5 33.2 24.7
    Feb 46.4 34.7 25.6
    Mar 59.6 45.9 35.2
    Apr 71.5 56.4 43.3
    May 78.4 64.6 53
    Jun 84.8 71.6 61.2
    Jul 85.8 73.2 63.9
    Aug 85.5 72.6 63.2
    Sep 80.7 66.8 56.9
    Oct 69.3 55.1 44.8
    Nov 58.9 44.8 34.4
    Dec 49.9 39.2 31.2

    Show Celsius

    Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
    Jan 6.9 0.7 -4.1
    Feb 8 1.5 -3.6
    Mar 15.3 7.7 1.8
    Apr 21.9 13.6 6.3
    May 25.8 18.1 11.7
    Jun 29.3 22 16.2
    Jul 29.9 22.9 17.7
    Aug 29.7 22.6 17.3
    Sep 27.1 19.3 13.8
    Oct 20.7 12.8 7.1
    Nov 14.9 7.1 1.3
    Dec 9.9 4 -0.4

     

    Precipitation (Rain or Snow)

    If dry weather is what you’re after, the months with the lowest chance of precipitation in Charleston are December, January, and then February. The lowest chance of rain or snow occurs around late September. For example, on the week of September 24th there are only 0.7 days of precipitation on average. By contrast, it’s most likely to rain or snow in early-to-mid-December with an average of 2.4 days with significant precipitation the week of December 10th.

    When can you find snow in Charleston? Weather stations report a bit of annual snow likely to be deepest around October, especially close to mid-December. Powder (new snow) is most often falls around October 29th. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

    Chance of Precipitation

    The graph below shows the % chance of rainy and snowy days in Charleston.

    Key
    Days with precipitation

    Snow on the Ground

    The graph below shows the average snow on the ground in Charleston (in).

    Key
    Snow depth

    Average Rain and Snow by Month

    Show Inches

    Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
    Jan 27.1 1.1 0.05
    Feb 27.1 1.2 0.05
    Mar 24.3 1 0.07
    Apr 22.9 0.6 0.06
    May 24.3 0 0.08
    Jun 22.9 0 0.08
    Jul 22.9 0 0.1
    Aug 18.6 0 0.05
    Sep 17.1 0 0.05
    Oct 18.6 2.1 0.05
    Nov 18.6 0.8 0.04
    Dec 30 1.4 0.08

    Show Centimeters

    Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
    Jan 27.1 2.8 0.13
    Feb 27.1 3 0.13
    Mar 24.3 2.5 0.18
    Apr 22.9 1.5 0.15
    May 24.3 0 0.2
    Jun 22.9 0 0.2
    Jul 22.9 0 0.25
    Aug 18.6 0 0.13
    Sep 17.1 0 0.13
    Oct 18.6 5.3 0.13
    Nov 18.6 2 0.1
    Dec 30 3.6 0.2

     

    Humidity and Wind

    Charleston has slightly high to average humidity compared to most tourist destinations. The least humid month is April (49.8% relative humidity), and the most humid month is August (73.8%).

    Wind in Charleston is usually moderate. The windiest month is April, followed by February and March. April’s average wind speed of around 3.4 knots (3.9 MPH or 6.3 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 11.3 knots, which is considered a moderate breeze.

    Relative Humidity (%)

    The graph below shows the average % humidity by month in Charleston.

    Key
    Avg. Relative Humidity

    Wind

    The graph below shows wind speed (max and average) in knots.

    Key
    Max Sustained Wind
    Average Daily Wind

    Average Wind Speeds

    Show Wind Speeds

    All wind speeds are in knots.

    Month Avg. Wind Meaning (Beaufort) Avg. Maximum Sustained Wind Meaning (Beufort)
    Jan 3.1 light air 8.9 a gentle breeze
    Feb 3.3 light air 9.6 a gentle breeze
    Mar 3.1 light air 9.3 a gentle breeze
    Apr 3.4 light air 10.3 a gentle breeze
    May 2.1 light air 8.2 a gentle breeze
    Jun 2 light air 8.3 a gentle breeze
    Jul 1.7 light air 7.6 a gentle breeze
    Aug 1.4 light air 6.7 a light breeze
    Sep 1.5 light air 6.7 a gentle breeze
    Oct 2 light air 7.4 a gentle breeze
    Nov 2.2 light air 7.7 a gentle breeze
    Dec 2.6 light air 8.4 a gentle breeze

    Show Relative Humidity by Month

    Month Avg. Relative Humidity
    Jan 66.3
    Feb 61.8
    Mar 57.7
    Apr 49.8
    May 65
    Jun 69.7
    Jul 73
    Aug 73.8
    Sep 72.5
    Oct 68.4
    Nov 62.3
    Dec 73.1

     

    Is it Safe to Travel to Charleston?

    As of 6/22/2017 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories.
     

    Overall Charleston Travel Experience by Season

    Spring (March through May)

    Humidity and temperatures combine to make this season feel moderate. Highs range from 62.6°F (17°C) and 36.8°F (2.7°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 8 days of precipitation per month. Spring is slow/unreported for tourism, which makes it a good time for those looking for deals.

    Summer (June through August)

    The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 6 to 7 days of precipitation per month. June – August is slow/unreported season for tourism in Charleston, so lodging and other accommodations may cost as much as usual.

    Fall (September through November)

    Fall daily highs range from 63.5°F (17.5°C) and 40.5°F (4.7°C), which will feel comfortable given the humidity and wind. It rains or snows a fair amount: 5 to 6 days per month. Tourism is slow/unreported during these months due to the weather, so hotels may be normally priced.

    Winter (December through February)

    Weather is too cold this time of year in Charleston to be enjoyable for warm weather travelers. The average high during this season is between 37.9°F (3.3°C) and 31.5°F (-0.3°C). On average, it rains or snows a noticeable amount: 8 to 9 times per month. These times of year are slow/unreported with tourists.

     

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