Summerville weather in July

In July, Summerville sees average daytime highs of 90°F and overnight lows near 74°F, with 6.1 in of rain across 19 wet days and about 14 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 90°F through the month. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 12 min at the start of July to 13 h 42 min by month's end. Set against the rest of the year, July is Summerville's 11th-clearest and 11th-windiest month. For the whole year in context, see Summerville's year-round climate.

Daytime high
90°
1st warmest
Overnight low
74°
12th coldest
Rainfall
6.1 in
19 wet days
Daylight
14 hours
5:27 AM – 7:26 PM
Cloud cover
63%
11th clearest
Wind
5 mph
11th windiest
Solar energy
6.04 kWh/m²
Travel score
3.1
out of 10

Summerville is town in South Carolina, United States.

Density
974/km²
people per km²
Founded
1847

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 90°F through the month.

A typical July day in Summerville reaches about 90°F in the afternoon and slips back to 74°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 95°F. Set against its neighbours, July runs about 2°F warmer than June and about 1°F warmer than August.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
18973
28973
38973
49073
59073
69073
79073
89073
99074
109074
119074
129074
139074
149074
159074
169074
179074
189074
199074
209074
219074
229074
239074
249074
259074
269074
279074
289074
299074
308974
318974

How July really feels in Summerville

Once humidity and wind are folded in, July 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 July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Summerville weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 39°3.28.810.14.8
Feb62° / 42°3.28.110.85.5
Mar69° / 48°3.48.811.76.7
Apr76° / 55°3.17.912.87.3
May82° / 64°3.210.313.76.1
Jun87° / 71°5.816.914.13.8
Jul90° / 74°6.119143.1
Aug88° / 73°6.61913.23.5
Sep84° / 68°4.912.612.25.3
Oct76° / 57°3.77.611.27.3
Nov68° / 47°2.56.610.37.0
Dec61° / 42°3.47.99.95.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 25% of July, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24456
34456
44555
54654
64654
74654
84654
94753
104753
114753
124753
134753
144654
154654
164555
174555
184555
194456
204456
214357
224357
234357
244357
254357
264357
274357
284258
294159
304258
314258

Chance of precipitation in July

Any precipitation

Summerville gets around 6.1 in of rain over 19 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 62% and peaks near 66% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
161
261
361
460
560
660
759
859
959
1059
1159
1259
1360
1460
1560
1661
1761
1862
1962
2063
2163
2264
2364
2465
2565
2666
2766
2866
2966
3066
3165

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11415728
21314739
313147210
413137211
513127212
613127113
713117114
812117115
912107116
1012107017
1112107017
121297018
131296919
140296920
150296920
160286921
170286822
180286822
190276823
200276724
210276724
220276625
230266725
240266725
250266626
260266626
270266626
280266626
290276526
300276625
310376525

Wind in July

Winds average 5 mph in July.

Across July, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 12 min at the start of July to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 5:19 AM to 5:37 AM, and sunset from 7:29 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:197:29
214.15:207:29
314.15:207:29
414.15:217:29
514.15:217:29
614.15:217:28
714.15:227:28
814.15:227:28
914.15:237:28
1014.15:237:28
1114.15:247:27
1214.05:257:27
1314.05:257:27
1414.05:267:27
1514.05:267:26
1614.05:277:26
1714.05:277:25
1813.95:287:25
1913.95:297:24
2013.95:297:24
2113.95:307:24
2213.95:317:23
2313.95:317:22
2413.85:327:22
2513.85:337:21
2613.85:337:21
2713.85:347:20
2813.75:357:19
2913.75:357:18
3013.75:367:18
3113.75:377:17

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.04 kWh/m².

For context, solar energy here swings from a low near 2.56 kWh/m² to a high of 6.29 kWh/m² in May across the year — July's 6.04 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Bright
216.0Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Summerville

In seasonPeak

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

Summerville 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 July a good time to visit Summerville?

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

3.1
Sightseeing
12th-best month of the year
5.1
Beach & pool
7th-best month of the year

July is a weaker month for outdoor sightseeing in Summerville.

What to pack for Summerville in July

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

In July, Summerville sees daytime highs around 90°F and nights near 74°F. Pack light clothes, rain gear and sun protection. About 19 days see rain.

light clothesrain gearsun protection

Sea temperature near Summerville in July

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

The sea at the nearest coast (about 27 mi away) is warmest in August at about 83°F and coldest in February near 59°F.

It's comfortable for a long swim from Apr 25 to Nov 14 — about 6.7 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb59Cool
Mar61Cool
Apr66Cool
May73Refreshing
Jun80Warm
Jul83Tropical
Aug83Tropical
Sep81Warm
Oct75Refreshing
Nov67Cool
Dec63Cool

UV index in Summerville in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Summerville peaks around July 13 at about 9 (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 9Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Summerville in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Summerville 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 Summerville?

Summerville sits at 33.0°N, 80.2°W, 89 ft above sea level, in United States. The nearest listed city is Goose Creek, 8.7 mi away.

Topography around Summerville

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

Within 2 miles, the terrain around Summerville has only modest variations in elevation — a maximum elevation change of 115 ft around an average of 85 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 299 ft.

The land around Summerville is covered by trees (74%) within 2 miles, trees (79%) within 10 miles, and trees (62%) and water (24%) within 50 miles.

2 miles
115 ft
10 miles
161 ft
50 miles
299 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Goose Creek 8.7 mi · Hanahan 11 mi · North Charleston 16 mi · Charleston 22 mi · Mount Pleasant 24 mi · Sumter 63 mi · Hilton Head 65 mi · Hilton Head Island 66 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 Summerville (33.0185°, -80.1757°, elevation 89 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).