If you plan to visit Charleston in December, the weather is typically alright, with an average high temperature of +61°F during the day and approximately 9 sunny days. Expect some rainy, though, as there are typically 11 rainy days in the month and around 78 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+61°F
Avg. max. temperature
+10°F
Min.
+81°F
Max.
78 mm
Total precipitation
76%
Avg. humidity
3 m/s
Avg. wind
9 ☀️
Sunny Days
10 ⛅️
Cloudy
11 🌦
Rainy
Our opinion: Charleston has OK weather in December.
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Average temperature in Charleston in December
Here are the expected maximum, average and minimum temperatures in Charleston for December based on the historical data.
Last Year
Historical Data
Going from a maximum of +75°F during the day to a minimum of +30°F during the night, the temperature in December averages around +63°F.
The average maximum temperature goes down 32% by the end of the month, compared with the beginning of the month, from +72°F to +57°F.
Is Charleston warm or cold in December?
Charleston is typically mild in December.
Maximum temperatures go down compared to the previous month from +68°F to +61°F. The minimum temperature also goes down from +52°F to +45°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
December is one of the coolest months in Charleston, here is the comparison with other months:
Climate in Charleston in December
Charleston weather looks like this, on average, in December and the surrounding months.
November
December
January
Avg. temperature
+68°F
+61°F
+59°F
Min. temperature
+28°F
+10°F
+10°F
Max. temperature
+84°F
+81°F
+79°F
Rainfall
68 mm
78 mm
80 mm
Wind
3 m/s
3 m/s
3 m/s
Humidity
77%
76%
73%
Air pressure
1019 HPa
1020 HPa
1019 HPa
Sunny days
11
9
9
Cloudy days
9
10
10
Rainy days
10
11
11
Snowy days
0
0
0
December weather is still as ok as in November.It’s getting colder in December. From +68°F in the day, the average maximum temperature lowers to +61°F.Prepare for more rain. Average rainfall goes from 68 mm to 78 mm.It feels drier, as humidity decreases from 77% to 76%.The average wind speed doesn’t change much during December, staying around 3 m/s.The days becoming less sunny, going from 11 sunny days in November to 9 in December.
But maybe it is worth considering traveling in January as the weather gets better.
Wind speed in Charleston in December based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Charleston is gradually increasing during December, going from 1 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during December in Charleston based on historical data.
Last Year
Historical Data
Typically, there is a 39% chance of rain on an average day in December, with total rainfall of approximately 215 mm. The maximum amount of rainfall per day is around 97 mm, which is considered heavy rain.December is a pretty wet month with over 12 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how December is compared with other months in the amount of precipitation, total mm:
Charleston wettest month is August, where a typical day has a 74% chance of precipitation and 179 mm of rainfall per day. November, on the other hand, is the driest month with a mere 33% chance of precipitation and 68 mm of rainfall per day.
Snow
Amount of snow in mm during December in Charleston based on historical data.
Last Year
Historical Data
Typically, there is a 0% chance of snow on an average day in December, with a total monthly snowfall of approximately 0 mm.
December is one of the snowiest months in Charleston.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Charleston?
This is the weather in Charleston in December 2024:
1 December
☀️
+71°F
2 December
🌫️
+71°F
3 December
🌧️
+73°F
4 December
☀️
+67°F
5 December
☀️
+65°F
6 December
☀️
+57°F
7 December
☀️
+58°F
8 December
☀️
+64°F
9 December
☀️
+69°F
10 December
🌧️
+74°F
11 December
🌧️
+65°F
12 December
☀️
+55°F
13 December
☀️
+59°F
14 December
☀️
+58°F
15 December
☀️
+60°F
16 December
☁️
+65°F
17 December
🌧️
+62°F
18 December
☀️
+60°F
19 December
☀️
+53°F
20 December
☀️
+51°F
21 December
☀️
+58°F
22 December
☀️
+62°F
23 December
☀️
+68°F
24 December
☀️
+68°F
25 December
☀️
+65°F
26 December
🌫️
+65°F
27 December
🌧️
+68°F
28 December
🌧️
+59°F
29 December
☀️
+52°F
30 December
☀️
+53°F
31 December
☀️
+57°F
In December 2024 Charleston had 22 sunny days, 1 cloudy days, and 6 rainy days. The average maximum temperature was +63°F, with an absolute maximum of +75°F and a minimum of +50°F. The average humidity was 77%, with a maximum of 100% and a minimum of 34%. The average wind speed was 3 m/s, with a maximum of 17 m/s and a minimum of 0 m/s.
Are you planning a trip in December?
Climate Change Over the Years
This is how Charleston climate has changed over the last 43 years.
The climate in Charleston in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1988 (+72°F) and the highest in 2012 (+77°F). The driest year was 2011 with only 770 mm of rainfall, and the wettest year was 2024 with 2044 mm.
FAQ
Frequently asked questions about the weather in Charleston in December:
Is December a good time to visit Charleston?
It’s always a good time to visit Charleston, but the weather is changeable in December, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Charleston in December?
December has mild temperatures in Charleston. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Charleston rainy in December?
Charleston is often rainy in December. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Charleston in December?
Usually, it’s not very sunny in Charleston in December, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Charleston, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
