North Charleston weather in August

In August, North Charleston sees average daytime highs of 87°F and overnight lows near 75°F, with 6.3 in of rain across 18.9 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 25% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is North Charleston's 12th-clearest and 12th-windiest month. For the whole year in context, see North Charleston's year-round climate.

Daytime high
87°
2nd warmest
Overnight low
75°
11th coldest
Rainfall
6.3 in
18.9 wet days
Daylight
13 h 12 min
5:47 AM – 7:01 PM
Cloud cover
62%
12th clearest
Wind
7 mph
12th windiest
Solar energy
5.47 kWh/m²
Travel score
3.9
out of 10

North Charleston is city in Berkeley, Charleston and Dorchester counties, South Carolina, United States.

Density
571/km²
people per km²
Founded
1972

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical August day in North Charleston reaches about 87°F in the afternoon and slips back to 75°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 91°F. Set against its neighbours, August runs on par with July and about 4°F warmer than September.

70°80°90°151015202531
Avg high (°F)Avg low (°F)
18776
28776
38776
48776
58776
68776
78776
88776
98776
108776
118776
128776
138776
148776
158776
168776
178776
188776
198775
208675
218675
228675
238675
248675
258675
268675
278674
288674
298574
308574
318574

How August really feels in North Charleston

Once humidity and wind are folded in, August averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

North Charleston weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 43°3.28.410.14.8
Feb62° / 45°3.37.810.85.4
Mar67° / 51°3.28.211.86.6
Apr73° / 58°2.97.512.87.4
May80° / 66°2.7913.76.8
Jun85° / 73°5.116.314.14.5
Jul88° / 76°5.417.813.93.7
Aug87° / 75°6.318.913.23.9
Sep83° / 71°5.113.312.25.5
Oct76° / 61°4.07.811.27.4
Nov67° / 51°2.66.810.36.9
Dec62° / 46°3.47.79.95.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in August, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34258
44357
54357
64456
74456
84555
94555
104654
114654
124654
134753
144753
154654
164753
174753
184852
194852
204852
214852
224852
234753
244753
254852
264852
274852
284753
294852
304951
314951

Chance of precipitation in August

Any precipitation

North Charleston gets around 6.3 in of rain over 18.9 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 61% and peaks near 64% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
162
262
362
462
561
661
761
861
961
1061
1162
1262
1363
1463
1563
1663
1764
1863
1963
2063
2162
2262
2361
2460
2559
2658
2757
2856
2954
3054
3153

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the miserable band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10054055
20164053
30164053
40164152
50164152
60164152
70164152
80164152
90164152
100154153
110154252
120154252
130154252
140154252
150164350
160164350
170164449
180174548
190174547
200174646
210184745
220184743
230194842
2401104841
2501104840
2601114939
2702124937
2812134935
2912144934
3012154932
3113165031

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 36 min at the start of August to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:37 AM to 5:58 AM, and sunset from 7:15 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:377:15
213.65:387:14
313.65:387:13
413.65:397:13
513.55:407:12
613.55:407:11
713.55:417:10
813.55:427:09
913.45:427:08
1013.45:437:07
1113.45:447:06
1213.35:457:05
1313.35:457:04
1413.35:467:03
1513.35:477:02
1613.25:477:01
1713.25:487:00
1813.25:496:58
1913.15:496:57
2013.15:506:56
2113.15:516:55
2213.05:516:54
2313.05:526:52
2413.05:536:51
2512.95:546:50
2612.95:546:49
2712.95:556:47
2812.85:566:46
2912.85:566:45
3012.85:576:44
3112.75:586:42

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.47 kWh/m².

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 6.47 kWh/m² in May across the year — August's 5.47 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.1Bright
315.1Bright
Planning a trip in August

Hazard calendar for North Charleston

In seasonPeak

In August, North Charleston sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

North Charleston sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit North Charleston?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.9
Sightseeing
11th-best month of the year
5.5
Beach & pool
6th-best month of the year

August is a weaker month for outdoor sightseeing in North Charleston.

What to pack for North Charleston in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, North Charleston sees daytime highs around 87°F and nights near 75°F. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

Sea temperature near North Charleston in August

The nearest coast averages about 83°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 mi away) is warmest in August at about 83°F and coldest in February near 60°F.

It's comfortable for a long swim from Apr 25 to Nov 19 — about 6.9 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan61Cool
Feb60Cool
Mar61Cool
Apr66Cool
May73Refreshing
Jun80Warm
Jul83Tropical
Aug83Tropical
Sep81Warm
Oct75Warm
Nov68Refreshing
Dec64Cool

UV index in North Charleston in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in North Charleston peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 13UV 10Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar7High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in North Charleston in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in North Charleston is worst in March — around 20 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1819 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb12Good
Mar20Moderate
Apr14Moderate
May13Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is North Charleston?

North Charleston sits at 32.9°N, 80.0°W, 20 ft above sea level, in United States. The nearest listed city is Hanahan, 5.0 mi away.

Topography around North Charleston

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of North Charleston.

Within 2 miles, the terrain around North Charleston has only modest variations in elevation — a maximum elevation change of 69 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 161 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 230 ft.

The land around North Charleston is covered by trees (27%) and artificial surfaces (27%) within 2 miles, trees (50%) within 10 miles, and trees (54%) and water (34%) within 50 miles.

2 miles
69 ft
10 miles
161 ft
50 miles
230 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Hanahan 5.0 mi · Charleston 6.2 mi · Mount Pleasant 7.5 mi · Goose Creek 9.3 mi · Summerville 16 mi · Hilton Head 63 mi · Hilton Head Island 64 mi · Bluffton 67 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for North Charleston (32.8546°, -79.9748°, elevation 20 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).