Simpsonville weather in August

In August, Simpsonville sees average daytime highs of 87°F and overnight lows near 70°F, with 4.2 in of rain across 12.5 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 4th-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 29% of the time in August, and the air most often feels muggy.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Simpsonville's 9th-clearest and 12th-windiest month. For the whole year in context, see Simpsonville's year-round climate.

Daytime high
87°
2nd warmest
Overnight low
70°
11th coldest
Rainfall
4.2 in
12.5 wet days
Daylight
13 h 18 min
5:54 AM – 7:13 PM
Cloud cover
59%
9th clearest
Wind
4 mph
12th windiest
Solar energy
5.43 kWh/m²
Travel score
4.3
out of 10

Simpsonville is city in Greenville County, South Carolina, United States of America.

Density
897/km²
people per km²

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 Simpsonville reaches about 87°F in the afternoon and slips back to 70°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 94°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

60°70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
18971
28971
38971
48971
58871
68871
78871
88871
98871
108871
118871
128871
138870
148870
158870
168770
178770
188770
198770
208770
218770
228770
238769
248769
258769
268769
278669
288669
298669
308668
318668

How August really feels in Simpsonville

Once humidity and wind are folded in, August averages 24 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
24
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.

Simpsonville weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan52° / 34°4.29.819.92.8
Feb56° / 36°3.88.70.810.73.8
Mar63° / 42°4.610.20.311.75.7
Apr72° / 51°3.88.8012.86.9
May80° / 60°3.310013.86.6
Jun86° / 68°3.912.9014.34.6
Jul89° / 71°3.813.9014.13.7
Aug87° / 70°4.212.5013.34.3
Sep82° / 64°3.78.6012.26.3
Oct72° / 52°3.17011.17.3
Nov62° / 41°3.67.8010.25.7
Dec54° / 36°4.29.30.59.73.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44753
54852
64753
74753
84753
94753
104753
114753
124753
134753
144852
154852
164852
174951
185050
195050
205149
215149
225248
235248
245248
255248
265248
275347
285347
295347
305347
315446

Chance of precipitation in August

Any precipitation

Simpsonville gets around 4.2 in of rain over 12.5 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 45% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
145
245
345
445
545
645
745
845
945
1045
1145
1245
1344
1444
1543
1642
1741
1841
1940
2039
2138
2237
2336
2436
2535
2635
2734
2834
2933
3032
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1341335450
2341335450
3341335440
4341336440
5351336430
6351336430
7351336430
8351336420
9351337420
10251337421
11251338411
12251438401
13251439401
14251440391
15251441381
16151541371
17151542361
18151543351
19151643341
20151644331
21151645321
22161745310
23161745300
24161845300
25261845290
26271845280
27271945270
28281944260
29292043250
303102043240
313112142230

Wind in August

Winds average 4 mph in August, the calmest month.

Across August, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:42 AM to 6:05 AM, and sunset from 7:28 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:427:28
213.75:437:27
313.75:447:26
413.75:457:25
513.65:457:24
613.65:467:23
713.65:477:22
813.65:487:21
913.55:487:20
1013.55:497:19
1113.55:507:18
1213.45:517:17
1313.45:517:16
1413.45:527:15
1513.35:537:14
1613.35:547:13
1713.35:547:11
1813.25:557:10
1913.25:567:09
2013.25:577:08
2113.15:587:06
2213.15:587:05
2313.15:597:04
2413.06:007:03
2513.06:017:01
2613.06:017:00
2712.96:026:59
2812.96:036:57
2912.96:046:56
3012.86:046:54
3112.86:056:53

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.43 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 6.19 kWh/m² in June across the year — August's 5.43 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in August

Is August a good time to visit Simpsonville?

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

4.3
Sightseeing
8th-best month of the year
6.3
Beach & pool
4th-best month of the year

August is a reasonable time to visit Simpsonville for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Simpsonville in August

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

In August, Simpsonville sees daytime highs around 87°F and nights near 70°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Simpsonville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Simpsonville peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 10UV 9Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Simpsonville 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 Simpsonville is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1718 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr11Good
May13Moderate
Jun16Moderate
Jul19Moderate
Aug16Moderate
Sep12Moderate
Oct9Good
Nov10Good
Dec8Good
Location & terrain

Where is Simpsonville?

Simpsonville sits at 34.7°N, 82.3°W, 860 ft above sea level, in United States. The nearest listed city is Mauldin, 4.3 mi away.

Topography around Simpsonville

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

Within 2 miles, the terrain around Simpsonville has only modest variations in elevation — a maximum elevation change of 213 ft around an average of 860 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 646 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,505 ft.

The land around Simpsonville is covered by trees (57%) and artificial surfaces (22%) within 2 miles, trees (63%) and grassland (25%) within 10 miles, and trees (81%) within 50 miles.

2 miles
213 ft
10 miles
646 ft
50 miles
4,505 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Mauldin 4.3 mi · Greenville 11 mi · Wade Hampton 12 mi · Taylors 13 mi · Greer 14 mi · Easley 21 mi · Spartanburg 24 mi · Anderson 28 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 Simpsonville (34.7371°, -82.2543°, elevation 860 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. 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).