Average weather for Charleston in May

It's pleasantly warm in May in Charleston with an average temperature of 21°C. Temperatures this month range from a low of 16°C to a high of 29°C. At night, you can expect temperatures between 3°C and 8°C.

Start of May

The month of May starts in Charleston with mild temps, averaging around 20°C during the day and nights around 5°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.

Mid May

By mid-May, daytime temps rise to around 21°C, with nights around 6°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.

End of May

By the end of May, the average daytime temperature in Charleston is around 23°C, while nighttime temps are about 6°C. A shower might pop up, but overall, the weather will be dry and sunny.

In May, there is an average of 70 mm of precipitation, spread over 7 days. Of the total precipitation, about 2,3 cm falls as snow in May. The wind speed is around 4 Bft, mostly coming from the Southwest.

Charleston in May		New York
Average temperature	21°C	22°C
Max. temperature	29°C	28°C
Min. temperature	16°C	-5°C
Total precipitation	70 mm	105 mm
Rainy days	7 days	14 days
Total snowfall	2,3 cm	0 cm
Snowy days	1 day	0 days

April

June

UV index

The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

Is May a good time to visit Charleston?

Looking for great weather? May is a good time to be in Charleston. The temperatures are nice, and there’s not too much rain.

Temperature records

With 34°C in 2017, Charleston reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 6°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -5°C to a highest value of 17°C.

Check out the climate of Charleston for all months and discover the best travel time

April

June

Daily Temperature in May in Charleston

This chart shows the average daily high and low temperatures in May for Charleston, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.

Daily Precipitation in May in Charleston

The chart below shows the average daily precipitation in May for Charleston, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 7 days of precipitation in Charleston.

Daily Precipitation in May in Charleston

Daily Snowfall in May in Charleston

This chart shows the average daily snowfall in May in Charleston, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in May.

Daily UV index in May in Charleston

This chart shows the average daily UV index in May in Charleston, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Temperature in May in Charleston over the years

This chart shows the average temperature in May in Charleston, measured in degrees Celsius, over the past few years.

Total precipitation in May in Charleston over the years

This chart shows the average precipitation in May in Charleston, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.

Snowfall in May in Charleston per year

This chart shows the average snowfall in May in Charleston, measured in centimeters, over the past few years.

Snowfall in May in Charleston over the past years

April

June

Daily weather in May for Charleston

Click on any day in May to get detailed info about the usual weather on that day in Charleston. Check out the historical temperatures and precipitation over the past 10 years on this day.

Average weather in Charleston by month

Click on a month below to see detailed weather info for Charleston. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.