Charleston weather in August: Charleston, West Virginia: normal highs, lows, rain and records for August
Charleston in August has a normal high of 85°F and a normal low of 64°F, a daily mean of 75°F, falling from 86°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 11 days in a normal August, 3.75 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 18°C, 95 mm of precipitation in August.
- 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 August?
The normal high is 85°F and the normal low 64°F, for a daily mean of 74.6°F. August is 1.2°F cooler than July and 6.3°F warmer than September. August is the 2nd warmest month of the year in Charleston and the 5th wettest. Across the month the normal high falls 2°F, from 86°F on August 1 to 84°F on August 31. From one year to the next August's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 72°F and 77°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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 86°F | 65°F | 39% | 25% |
| August 8 | 86°F | 65°F | 37% | 24% |
| August 15 | 86°F | 65°F | 35% | 22% |
| August 22 | 85°F | 64°F | 33% | 20% |
| August 31 | 84°F | 62°F | 31% | 19% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 86°F | 65°F | 39% | 25% | 14 h 10 min |
| August 2 | 86°F | 65°F | 39% | 25% | 14 h 10 min |
| August 3 | 86°F | 65°F | 38% | 25% | 14 h 10 min |
| August 4 | 86°F | 65°F | 38% | 25% | 14 h |
| August 5 | 86°F | 65°F | 38% | 24% | 14 h |
| August 6 | 86°F | 65°F | 38% | 24% | 14 h |
| August 7 | 86°F | 65°F | 38% | 24% | 14 h |
| August 8 | 86°F | 65°F | 37% | 24% | 14 h |
| August 9 | 86°F | 65°F | 37% | 24% | 13 h 50 min |
| August 10 | 86°F | 65°F | 37% | 23% | 13 h 50 min |
| August 11 | 86°F | 65°F | 37% | 23% | 13 h 50 min |
| August 12 | 86°F | 65°F | 36% | 23% | 13 h 50 min |
| August 13 | 86°F | 65°F | 36% | 23% | 13 h 50 min |
| August 14 | 86°F | 65°F | 36% | 23% | 13 h 40 min |
| August 15 | 86°F | 65°F | 35% | 22% | 13 h 40 min |
| August 16 | 85°F | 64°F | 35% | 22% | 13 h 40 min |
| August 17 | 85°F | 64°F | 35% | 22% | 13 h 40 min |
| August 18 | 85°F | 64°F | 35% | 22% | 13 h 40 min |
| August 19 | 85°F | 64°F | 34% | 21% | 13 h 30 min |
| August 20 | 85°F | 64°F | 34% | 21% | 13 h 30 min |
| August 21 | 85°F | 64°F | 33% | 21% | 13 h 30 min |
| August 22 | 85°F | 64°F | 33% | 20% | 13 h 30 min |
| August 23 | 85°F | 63°F | 33% | 20% | 13 h 20 min |
| August 24 | 85°F | 63°F | 32% | 20% | 13 h 20 min |
| August 25 | 85°F | 63°F | 32% | 20% | 13 h 20 min |
| August 26 | 85°F | 63°F | 32% | 19% | 13 h 20 min |
| August 27 | 85°F | 63°F | 31% | 19% | 13 h 20 min |
| August 28 | 84°F | 63°F | 31% | 19% | 13 h 10 min |
| August 29 | 84°F | 62°F | 31% | 19% | 13 h 10 min |
| August 30 | 84°F | 62°F | 31% | 19% | 13 h 10 min |
| August 31 | 84°F | 62°F | 31% | 19% | 13 h 10 min |
- Normal high
- 85°FAugust average
- Normal low
- 64°FAugust average
- Precipitation
- 3.75 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 14 h 10 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 26
- Sunshine
- 78%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 August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 1 (39%). In all, 3.75 in falls on 11 days of a normal August, 1 of them with an inch or more.
In a normal August in Charleston, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013866.
How humid and windy is Charleston in August?
At 3 p.m. the normal temperature is 82°F with 51% relative humidity and a dew point of 62°F; at 6 a.m. it is 64°F with 95% humidity. The wind averages 2.7 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 64°F | 62°F | 95% | 1.3 mph | – |
| 9 a.m. | 71°F | 64°F | 80% | 2.9 mph | – |
| noon | 79°F | 64°F | 59% | 4.8 mph | 32% |
| 3 p.m. | 82°F | 62°F | 51% | 5.4 mph | 22% |
| 6 p.m. | 79°F | 63°F | 59% | 3.9 mph | 45% |
| 9 p.m. | 70°F | 65°F | 84% | 1.5 mph | 56% |
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 August in Charleston?
The warmest August temperature on Charleston's official record (since 1892) is 108°F, on August 6, 1918; the coldest is 41°F, on August 29, 1965. The wettest August brought 10.92 in (2026).
The August mean against the 1991-2020 normal of 74.6°F: 2021 77.0°F (+2.4), 2022 74.9°F (+0.3), 2023 73.8°F (−0.8), 2024 76.8°F (+2.3), 2025 74.2°F (−0.4), 2026 75.9°F (+1.3). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.0°F | +2.4°F | 6.10 in |
| 2022 | 74.9°F | +0.3°F | 9.27 in |
| 2023 | 73.8°F | −0.8°F | 4.06 in |
| 2024 | 76.8°F | +2.3°F | 3.54 in |
| 2025 | 74.2°F | −0.4°F | 0.94 in |
| 2026 | 75.9°F | +1.3°F | 10.92 in |
Source: records: ACIS, NWS threaded record CRWthr; recent months: ACIS, station USW00013866. Records and recent months use complete months only.
How does August in Charleston compare across West Virginia?
Across the 63 places PlainClimate covers in West Virginia, August normal highs run from 74°F in Davis to 88°F in Hamlin; Charleston's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Charleston in July86°F by day, 66°F at night
- Charleston in September80°F by day, 57°F at night
- Charleston through the yearEvery month, frost dates, records and recent years
- West Virginia in AugustThe statewide normal and the warmest and coolest places
- Hamlin: West Virginia's warmest Augustnormal high 88°F