Folly Beach Weather in September
Average highs run from 85°F on September 1 to 80°F on September 30, and lows from 75°F to 69°F. Normal precipitation for the month is 5.25 in over about 9 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 83°F
- Average low
- 73°F
- Precipitation
- 5.25 in
- Record high
- 100°FSep 1, 1912
- Record low
- 50°FSep 29, 1942
- Chance of a freeze
- 0%
- Days of 90°F or more
- 1.7
- Daylight
- 12 h 49 min to 11 h 53 min
- Cloud cover
- 58%
- Humidity
- 78%
- Dew point
- 71°F
- Wind
- 12.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 85°F | 75°F | 100°F 1912 | 63°F 1934 | 34% | 0% |
| Sep 2 | 85°F | 75°F | 100°F 1912 | 64°F 1915 | 33% | 0% |
| Sep 3 | 85°F | 75°F | 95°F 1912 | 66°F 1915 | 33% | 0% |
| Sep 4 | 85°F | 75°F | 100°F 1944 | 65°F 1924 | 33% | 0% |
| Sep 5 | 84°F | 75°F | 100°F 1944 | 62°F 1950 | 32% | 0% |
| Sep 6 | 84°F | 75°F | 98°F 1921 | 61°F 1950 | 32% | 0% |
| Sep 7 | 84°F | 74°F | 97°F 1921 | 63°F 1988 | 32% | 0% |
| Sep 8 | 84°F | 74°F | 96°F 1939 | 63°F 1932 | 31% | 0% |
| Sep 9 | 84°F | 74°F | 97°F 1939 | 60°F 1956 | 31% | 0% |
| Sep 10 | 84°F | 74°F | 97°F 1985 | 59°F 1956 | 31% | 0% |
| Sep 11 | 84°F | 74°F | 98°F 1985 | 59°F 1956 | 30% | 0% |
| Sep 12 | 83°F | 74°F | 95°F 1920 | 58°F 1917 | 30% | 0% |
| Sep 13 | 83°F | 73°F | 95°F 1920 | 60°F 1958 | 30% | 0% |
| Sep 14 | 83°F | 73°F | 94°F 1938 | 58°F 1985 | 30% | 0% |
| Sep 15 | 83°F | 73°F | 96°F 1980 | 61°F 1967 | 29% | 0% |
| Sep 16 | 83°F | 73°F | 94°F 1927 | 59°F 1908 | 29% | 0% |
| Sep 17 | 83°F | 72°F | 94°F 1896 | 60°F 1908 | 29% | 0% |
| Sep 18 | 82°F | 72°F | 98°F 1931 | 60°F 1910 | 29% | 0% |
| Sep 19 | 82°F | 72°F | 96°F 1942 | 57°F 1981 | 28% | 0% |
| Sep 20 | 82°F | 72°F | 97°F 1942 | 54°F 1929 | 28% | 0% |
| Sep 21 | 82°F | 72°F | 93°F 1925 | 54°F 1918 | 28% | 0% |
| Sep 22 | 82°F | 71°F | 92°F 1925 | 53°F 1913 | 28% | 0% |
| Sep 23 | 81°F | 71°F | 93°F 1980 | 55°F 1983 | 28% | 0% |
| Sep 24 | 81°F | 71°F | 92°F 1931 | 56°F 1963 | 27% | 0% |
| Sep 25 | 81°F | 70°F | 92°F 1986 | 57°F 1974 | 27% | 0% |
| Sep 26 | 81°F | 70°F | 91°F 1986 | 51°F 1940 | 27% | 0% |
| Sep 27 | 81°F | 70°F | 94°F 1986 | 51°F 1940 | 27% | 0% |
| Sep 28 | 80°F | 70°F | 93°F 2017 | 54°F 1947 | 26% | 0% |
| Sep 29 | 80°F | 69°F | 90°F 1911 | 50°F 1942 | 26% | 0% |
| Sep 30 | 80°F | 69°F | 94°F 1904 | 50°F 1967 | 26% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:55 AM, sunset 7:44 PM
- September 30
- sunrise 7:13 AM, sunset 7:06 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00013782 (Charleston City), public domain. Records: NOAA GHCN-Daily, station USW00013782, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.