Charleston, SC 14-Day Forecast

South Carolina, United States 🇺🇸
87°
Partly Cloudy right now Today: high 98°, low 80°
Updated 4 hours ago

Charleston weather for the next 14 days

Today

Sunny High 98° Low 80°
Precipitation
10% · 0.0 in
11 mph
9 - Very High
Sunrise / sunset
06:44 AM / 08:03 PM

Tuesday, August 18

Sunny High 103° Low 82°
Precipitation
7% · 0.0 in
Max wind
12 mph
Humidity
62%
UV index
9 - Very High
Sunrise / sunset
06:45 AM / 08:01 PM

Wednesday, August 19

Sunny High 101° Low 80°
Precipitation
4% · 0.0 in
Max wind
12 mph
Humidity
56%
UV index
9 - Very High
Sunrise / sunset
06:45 AM / 08:00 PM

Thursday, August 20

Sunny High 95° Low 79°
Precipitation
4% · 0.0 in
Max wind
12 mph
Humidity
64%
UV index
9 - Very High
Sunrise / sunset
06:46 AM / 07:59 PM

Friday, August 21

Sunny High 93° Low 79°
Precipitation
38% · 0.04 in
Max wind
13 mph
Humidity
67%
UV index
9 - Very High
Sunrise / sunset
06:47 AM / 07:58 PM

Saturday, August 22

Overcast High 90° Low 77°
Precipitation
75% · 0.18 in
Max wind
15 mph
Humidity
70%
UV index
7 - High
Sunrise / sunset
06:47 AM / 07:57 PM

Sunday, August 23

Light rain shower High 80° Low 74°
Precipitation
89% · 0.41 in
Max wind
9 mph
Humidity
86%
UV index
6 - High
Sunrise / sunset
06:48 AM / 07:56 PM

Monday, August 24

Light rain shower High 90° Low 73°
Precipitation
77% · 0.46 in
Max wind
11 mph
Humidity
74%
UV index
8 - Very High
Sunrise / sunset
06:49 AM / 07:54 PM

Tuesday, August 25

Patchy rain nearby High 93° Low 75°
Precipitation
74% · 0.54 in
Max wind
11 mph
Humidity
71%
UV index
8 - Very High
Sunrise / sunset
06:49 AM / 07:53 PM

Wednesday, August 26

Sunny High 96° Low 75°
Precipitation
71% · 0.33 in
Max wind
18 mph
Humidity
72%
UV index
8 - Very High
Sunrise / sunset
06:50 AM / 07:52 PM

Thursday, August 27

Sunny High 92° Low 75°
Precipitation
57% · 0.1 in
Max wind
12 mph
Humidity
73%
UV index
8 - Very High
Sunrise / sunset
06:51 AM / 07:51 PM

Friday, August 28

Sunny High 95° Low 73°
Precipitation
4% · 0.0 in
Max wind
9 mph
Humidity
55%
UV index
9 - Very High
Sunrise / sunset
06:51 AM / 07:50 PM

Saturday, August 29

Overcast High 90° Low 77°
Precipitation
66% · 0.09 in
Max wind
12 mph
Humidity
63%
UV index
7 - High
Sunrise / sunset
06:52 AM / 07:48 PM

Sunday, August 30

Patchy rain nearby High 87° Low 74°
Precipitation
57% · 0.06 in
Max wind
11 mph
Humidity
69%
UV index
8 - Very High
Sunrise / sunset
06:53 AM / 07:47 PM

Charleston 14-day outlook: the story

The warmest day of Charleston's 14-day outlook is Tuesday, August 18 with a high near 103°F (40°C); the coolest night comes Friday, August 28, dipping to 73°F (23°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 94°F (35°C), about 8°F (4°C) above the typical August high of 86°F (30°C).

Precipitation is most likely on Saturday 22, Sunday 23, Monday 24, Tuesday 25 and beyond; the wettest day looks like Tuesday, August 25 with about 0.54 in (13.7 mm) expected. For the weekend, expect Saturday 90°F (32°C) and overcast / Sunday 80°F (27°C) and light rain shower.

For typical conditions month by month, see the Charleston climate & average temperatures guide.

Charleston forecast questions

Will it rain in Charleston this week?
The forecast currently shows meaningful precipitation chances on 8 of the next 14 days, peaking around Tuesday, August 25.
What will be the warmest day in Charleston over the next 14 days?
Tuesday, August 18, with a forecast high near 103°F (40°C).
How accurate is a 14-day forecast for Charleston?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.

Average temperatures in Charleston by month

Monthly averages for Charleston based on 2015–2024 weather data.
MonthHighLow Rain daysPrecipitation SunshineHumidity
January 58° 44° 10 3.2 in 7.6 h/day 73%
February 62° 48° 9 3.3 in 8.0 h/day 76%
March 67° 53° 9 3.0 in 8.9 h/day 72%
April 73° 59° 8 4.3 in 10.8 h/day 70%
May 80° 67° 11 3.5 in 11.5 h/day 73%
June 85° 74° 16 4.8 in 11.6 h/day 77%
July 88° 77° 17 4.9 in 11.5 h/day 78%
August 86° 76° 19 7.0 in 10.7 h/day 81%
September 83° 72° 14 5.9 in 9.9 h/day 79%
October 76° 63° 7 3.7 in 9.3 h/day 75%
November 67° 53° 8 3.2 in 8.2 h/day 75%
December 62° 49° 9 4.8 in 7.0 h/day 77%
14-day forecasts nearby