Charleston, WV weather in August
August in Charleston: warm and often humid, with frequent rain. Highs 85°F, lows 64°F, about 11 days with rain. This is the peak of the warm season in Charleston.
- Normal high
- 85°F
- Normal low
- 64°F
- Wet days
- 11
- 3.8 in total
- Muggy days
- 17
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 86°F | 84°F |
| Normal low | 65°F | 62°F |
| Chance of a wet day | 38% | 31% |
| Sunrise / sunset | 6:28 am / 8:36 pm | 6:55 am / 7:58 pm |
| Daylight | 14.1 h | 13.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am65°Fdew point 64°F
- 9 am72°Fdew point 66°F
- Noon80°Fdew point 65°F
- 3 pm83°Fdew point 64°F
- 6 pm80°Fdew point 65°F
- 9 pm72°Fdew point 67°F
NOAA hourly normals (local standard time) from Charleston Yeager Airport (3 mi away); average wind 3 mph; clear or few clouds in 55% of daytime hours, mostly cloudy or overcast in 29%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 31
- Hot dayshigh 90°F or more7 of 31
- Muggy daysdaily mean dew point 65°F or more17 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.8 in; a dry August brings about 3.0 in and a wet one about 4.3 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202007: average high 91°F
- Coolest August1997: average high 80°F
- Wettest August2003: 6.5 in
- Driest August2012: 0.3 in
- Highest reading104°F (August 16, 2007)
- Lowest reading47°F (August 31, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 86°F | 85°F | 80°F |
| Normal low | 66°F | 64°F | 57°F |
| Wet days | 13 | 11 | 9 |
| Comfortable days | 2 | 2 | 10 |
| Daylight | 14.5 h | 13.6 h | 12.4 h |
Highs change by -1°F from July and -5°F into September.
How Charleston ranks in August
- Normal high205th warmest of 378 cities; 2nd of 4 in West Virginia
- Wet days298th driest of 378
- Comfortable days179th most of 341
What to pack for Charleston in August
- Light, breathable clothing – highs near 85°F and about 17 muggy days
- A rain jacket or umbrella – rain on about 11 days
Heating and cooling
August has 1 heating degree days and 300 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Charleston in August?
The normal high is 85°F and the normal low is 64°F. From 1991 to 2020 the hottest August reading was 104°F (August 16, 2007).
Does it rain a lot in Charleston in August?
About 11 days in August have at least 0.01 in of precipitation, and the normal total is 3.8 in. The wettest August in 1991-2020 was in 2003 (6.5 in); the driest was in 2012 (0.3 in).
Is August a good time to visit Charleston?
August ranks 9th of 12 months on our comfort score for Charleston (49 out of 100). It has about 2 comfortable days and about 7 days at 90°F or hotter. The best months are April, May and October.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Charleston Yeager Airport (USW00013866), 3.1 mi NE of the city center, 910 ft (314 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Huntington Tri State Airport (USW00003860), 50 mi W of the city center, 824 ft (228 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Yeager Airport (724140-13866), 3.1 mi NE of the city center, 912 ft (316 ft higher than the city). Hourly observations, 1991-2020.