Charleston weather in September: Charleston, West Virginia: normal highs, lows, rain and records for September
Charleston in September has a normal high of 80°F and a normal low of 57°F, a daily mean of 68°F, falling from 84°F on the 1st to 74°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.46 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 14°C, 88 mm of precipitation in September.
- NOAA stationCharleston - West Virginia International Yeager Airport
- Station IDUSW00013866
- Location38.38°N 81.59°W
- Elevation910 ft (277 m)
- From the center3 miles
- Population46,482
- Jan 44° 26°
- Feb 48° 29°
- Mar 57° 35°
- Apr 69° 45°
- May 76° 53°
- Jun 83° 62°
- Jul 86° 66°
- Aug 85° 64°
- Sep 80° 57°
- Oct 69° 45°
- Nov 57° 36°
- Dec 48° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Charleston in September?
The normal high is 80°F and the normal low 57°F, for a daily mean of 68.3°F. September is 6.3°F cooler than August and 11.3°F warmer than October. September is the 4th warmest month of the year in Charleston and the 8th wettest. Across the month the normal high falls 10°F, from 84°F on September 1 to 74°F on September 30. From one year to the next September's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 66°F and 71°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 62°F | 31% | 19% |
| September 8 | 82°F | 60°F | 30% | 18% |
| September 15 | 80°F | 58°F | 29% | 19% |
| September 22 | 77°F | 55°F | 30% | 20% |
| September 30 | 74°F | 52°F | 31% | 20% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 62°F | 31% | 19% | 13 h |
| September 2 | 84°F | 61°F | 30% | 19% | 13 h |
| September 3 | 83°F | 61°F | 30% | 19% | 13 h |
| September 4 | 83°F | 61°F | 30% | 19% | 13 h |
| September 5 | 83°F | 61°F | 30% | 19% | 12 h 50 min |
| September 6 | 83°F | 60°F | 30% | 19% | 12 h 50 min |
| September 7 | 82°F | 60°F | 30% | 18% | 12 h 50 min |
| September 8 | 82°F | 60°F | 30% | 18% | 12 h 50 min |
| September 9 | 82°F | 60°F | 30% | 19% | 12 h 40 min |
| September 10 | 82°F | 59°F | 30% | 19% | 12 h 40 min |
| September 11 | 81°F | 59°F | 30% | 19% | 12 h 40 min |
| September 12 | 81°F | 59°F | 30% | 19% | 12 h 40 min |
| September 13 | 81°F | 58°F | 30% | 19% | 12 h 30 min |
| September 14 | 80°F | 58°F | 30% | 19% | 12 h 30 min |
| September 15 | 80°F | 58°F | 29% | 19% | 12 h 30 min |
| September 16 | 80°F | 57°F | 30% | 19% | 12 h 30 min |
| September 17 | 79°F | 57°F | 30% | 19% | 12 h 20 min |
| September 18 | 79°F | 56°F | 30% | 19% | 12 h 20 min |
| September 19 | 79°F | 56°F | 30% | 19% | 12 h 20 min |
| September 20 | 78°F | 56°F | 30% | 19% | 12 h 20 min |
| September 21 | 78°F | 55°F | 30% | 19% | 12 h 20 min |
| September 22 | 77°F | 55°F | 30% | 20% | 12 h 10 min |
| September 23 | 77°F | 55°F | 30% | 20% | 12 h 10 min |
| September 24 | 77°F | 54°F | 30% | 20% | 12 h 10 min |
| September 25 | 76°F | 54°F | 31% | 20% | 12 h 10 min |
| September 26 | 76°F | 53°F | 31% | 20% | 12 h |
| September 27 | 76°F | 53°F | 31% | 20% | 12 h |
| September 28 | 75°F | 53°F | 31% | 20% | 12 h |
| September 29 | 75°F | 52°F | 31% | 20% | 12 h |
| September 30 | 74°F | 52°F | 31% | 20% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 57°FSeptember average
- Precipitation
- 3.46 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013866; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Charleston in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 28 (31%). In all, 3.46 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Charleston, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013866.
How humid and windy is Charleston in September?
At 3 p.m. the normal temperature is 72°F with 50% relative humidity and a dew point of 53°F; at 6 a.m. it is 54°F with 92% humidity. The wind averages 3.2 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 54°F | 52°F | 92% | 1.8 mph | – |
| 9 a.m. | 60°F | 54°F | 82% | 3.0 mph | – |
| noon | 69°F | 54°F | 57% | 5.7 mph | 40% |
| 3 p.m. | 72°F | 53°F | 50% | 5.9 mph | 37% |
| 6 p.m. | 68°F | 54°F | 61% | 3.3 mph | 54% |
| 9 p.m. | 60°F | 55°F | 83% | 2.1 mph | 63% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013866. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Charleston?
The warmest September temperature on Charleston's official record (since 1892) is 104°F, on September 3, 1932; the coldest is 32°F, on September 29, 1942. The wettest September brought 11.62 in (2018).
The September mean against the 1991-2020 normal of 68.3°F: 2021 68.5°F (+0.2), 2022 66.5°F (−1.8), 2023 68.9°F (+0.6), 2024 70.5°F (+2.2), 2025 69.8°F (+1.5), 2026 72.5°F (+4.2). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.5°F | +0.2°F | 1.99 in |
| 2022 | 66.5°F | −1.8°F | 1.40 in |
| 2023 | 68.9°F | +0.6°F | 3.59 in |
| 2024 | 70.5°F | +2.2°F | 1.84 in |
| 2025 | 69.8°F | +1.5°F | 2.06 in |
| 2026 | 72.5°F | +4.2°F | 4.24 in |
Source: records: ACIS, NWS threaded record CRWthr; recent months: ACIS, station USW00013866. Records and recent months use complete months only.
How does September in Charleston compare across West Virginia?
Across the 63 places PlainClimate covers in West Virginia, September normal highs run from 68°F in Davis to 82°F in Hamlin; Charleston's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Charleston in August85°F by day, 64°F at night
- Charleston in October69°F by day, 45°F at night
- Charleston through the yearEvery month, frost dates, records and recent years
- West Virginia in SeptemberThe statewide normal and the warmest and coolest places
- Hamlin: West Virginia's warmest Septembernormal high 82°F