The best times to visit Charleston for ideal weather are
April 23rd to May 20th
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.
Charleston Travel Guide
Weather in Charleston
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)
Charleston Temperatures (Celsius)
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)
Charleston Perceived Temperature (C)
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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
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.
Snow on the Ground
The graph below shows the average snow on the ground in Charleston (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
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.
The graph below shows wind speed (max and average) in knots.
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|
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.