North Charleston, SC weather in August
August in North Charleston: warm and oppressively humid, with frequent rain. Highs 86°F, lows 77°F, about 13 days with rain. This is the peak of the warm season in North Charleston.
- Normal high
- 86°F
- Normal low
- 77°F
- Wet days
- 13
- 7.0 in total
- Muggy days
- 30
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 88°F | 85°F |
| Normal low | 77°F | 75°F |
| Chance of a wet day | 44% | 39% |
| Sunrise / sunset | 6:33 am / 8:18 pm | 6:53 am / 7:46 pm |
| Daylight | 13.8 h | 12.9 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 am74°Fdew point 72°F
- 9 am82°Fdew point 73°F
- Noon87°Fdew point 72°F
- 3 pm87°Fdew point 72°F
- 6 pm83°Fdew point 72°F
- 9 pm78°Fdew point 73°F
NOAA hourly normals (local standard time) from Charleston Intl Airport (5 mi away); average wind 7 mph; clear or few clouds in 31% of daytime hours, mostly cloudy or overcast in 39%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph20 of 31
- Hot dayshigh 90°F or more7 of 31
- Muggy daysdaily mean dew point 65°F or more30 of 31
- Wet daysat least 0.01 in of rain or melted snow13 of 31
- Notable rainat least 0.10 in9 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 7.0 in; a dry August brings about 4.5 in and a wet one about 9.5 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201999: average high 90°F
- Coolest August2004: average high 83°F
- Wettest August2002: 11.4 in
- Driest August2001: 1.6 in
- Highest reading103°F (August 1, 1999)
- Lowest reading66°F (August 15, 2013)
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 | 88°F | 86°F | 83°F |
| Normal low | 77°F | 77°F | 73°F |
| Wet days | 13 | 13 | 10 |
| Comfortable days | 0 | 0 | 3 |
| Daylight | 14.1 h | 13.3 h | 12.4 h |
Highs change by -2°F from July and -3°F into September.
Nearby alternatives in August
- Warmer: Columbia, SC100 mi · high 94°F · 10 wet days
- Drier: Charlotte, NC171 mi · high 89°F · 10 wet days
How North Charleston ranks in August
- Normal high187th warmest of 378 cities; 5th of 5 in South Carolina
- Wet days333rd driest of 378
- Comfortable days253rd most of 341
What to pack for North Charleston in August
- Light, breathable clothing – highs near 86°F and about 30 muggy days
- A rain jacket or umbrella – rain on about 13 days
- A swimsuit – about 20 beach days
Heating and cooling
August has 0 heating degree days and 510 cooling degree days (base 65°F), 13% of the year's total heating and cooling demand.
Questions
How hot is North Charleston in August?
The normal high is 86°F and the normal low is 77°F. From 1991 to 2020 the hottest August reading was 103°F (August 1, 1999).
Does it rain a lot in North Charleston in August?
About 13 days in August have at least 0.01 in of precipitation, and the normal total is 7.0 in. The wettest August in 1991-2020 was in 2002 (11.4 in); the driest was in 2001 (1.7 in).
Is August a good time to visit North Charleston?
August ranks 12th of 12 months on our comfort score for North Charleston (44 out of 100). It has almost no comfortable days and about 7 days at 90°F or hotter. The best month is April.
Where the numbers come from
- Temperature: Charleston City (USW00013782), 5.7 mi SSE of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Charleston Intl Airport (USW00013880), 4.9 mi NW of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Charleston AFB/International Airport (722080-13880), 4.9 mi NW of the city center, 39 ft . Hourly observations, 1991-2020.