As of 08:46 EDT

Charleston, SC weather in September

80°

Charleston, Sunday, 9 August, 08:46

Overcast. Feels like 80°. High 91°, low 75°.

Pressure30.12 inHg

Wind3 mph N

Humidity95%

Visibility6.2 mi

Dew point78°

See detailed hourly forecast

In September, Charleston, SC averages a high of 82° and a low of 70.9°. About 4.9 inches of precipitation fall over the month (14 wet days). The record high is 95.4° (2020) and the record low 52° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	84°	73.6°	53%	91.2° (1970)	62.8° (1999)
2	83.5°	73.6°	58%	90.7° (2020)	64.9° (1967)
3	83.8°	72.7°	43%	93.2° (2020)	64.2° (2025)
4	83.7°	72.9°	47%	95.4° (2020)	65.1° (2023)
5	83.1°	72.7°	57%	90.7° (1999)	63.7° (1997)
6	83.5°	72.7°	60%	92.5° (2023)	61.5° (1997)
7	83.7°	72.7°	50%	92.8° (2023)	65.5° (1972)
8	83.1°	72.3°	45%	90.5° (1983)	63.9° (1972)
9	82.6°	72.3°	53%	90° (2010)	65.1° (1998)
10	83.1°	71.6°	48%	90.9° (1985)	61° (2017)
11	82.8°	71.6°	43%	91.2° (1985)	61.2° (1998)
12	82.8°	71.6°	42%	88.9° (1991)	59.9° (1976)
13	82.6°	71.4°	35%	90° (2018)	62.1° (1969)
14	82.8°	71.2°	42%	91° (1984)	58.1° (1985)
15	82.9°	71.1°	35%	92.1° (1980)	63° (1967)
16	82.4°	71.1°	45%	91.6° (1980)	59.5° (2001)
17	81.7°	70.9°	50%	91° (1972)	59.7° (2001)
18	81.9°	70.9°	45%	90.9° (1972)	58.8° (2001)
19	81.5°	70.2°	45%	89.1° (1972)	60.3° (1981)
20	81.3°	70°	48%	92.1° (2010)	57.6° (1981)
21	81.3°	70.5°	43%	89.4° (1990)	56.8° (2020)
22	81.5°	70°	45%	91.8° (2022)	54° (2020)
23	80.8°	68.7°	33%	88.3° (1980)	53.6° (2020)
24	79.9°	68.2°	30%	88.7° (2019)	57.4° (1967)
25	80.4°	68.9°	43%	88.5° (2025)	57.2° (1990)
26	80.4°	69.4°	45%	87.8° (1980)	58.5° (2021)
27	80.6°	69.8°	48%	90.5° (1986)	57.6° (1982)
28	80.4°	68.7°	45%	91.6° (2017)	58.1° (1962)
29	78.8°	68.2°	38%	89.8° (2019)	58.1° (1962)
30	78.3°	66.9°	37%	88.2° (2019)	52° (1967)