Greenville weather in September

In September, Greenville sees average daytime highs of 82°F and overnight lows near 63°F, with 3.6 in of rain across 8.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 85°F in the first days to 78°F by the end. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Greenville's 3rd-clearest and 9th-windiest month. For the whole year in context, see Greenville's year-round climate.

Daytime high
82°
4th warmest
Overnight low
63°
9th coldest
Rainfall
3.6 in
8.7 wet days
Daylight
12 h 12 min
6:17 AM – 6:30 PM
Cloud cover
53%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.6 kWh/m²
Travel score
6.4
out of 10

Greenville is county seat of Greenville County, South Carolina, United States.

Density
858/km²
people per km²
Founded
1831

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 85°F in the first days to 78°F by the end.

A typical September day in Greenville reaches about 82°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 90°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18568
28567
38567
48567
58567
68466
78466
88466
98465
108365
118365
128365
138364
148264
158264
168263
178163
188163
198162
208062
218062
228062
237961
247961
257960
267860
277860
287859
297759
307758

How September really feels in Greenville

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Greenville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan52° / 34°4.51019.92.8
Feb55° / 36°4.09.10.810.73.7
Mar63° / 42°4.810.30.311.75.6
Apr72° / 51°3.98.9012.96.9
May79° / 59°3.39.9013.86.7
Jun86° / 67°3.713014.34.7
Jul89° / 71°3.613.5014.13.9
Aug87° / 70°4.012.5013.34.4
Sep82° / 63°3.68.7012.26.4
Oct72° / 52°3.26.8011.17.4
Nov62° / 41°3.88.3010.25.6
Dec54° / 36°4.59.40.59.73.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55545
65545
75644
85644
95644
105644
115743
125743
135743
145644
155644
165545
175446
185446
195446
205446
215446
225446
235446
245545
255644
265644
275644
285644
295743
305743

Chance of precipitation in September

Any precipitation

Greenville gets around 3.6 in of rain over 8.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
231
331
430
529
629
728
828
927
1027
1127
1227
1327
1427
1527
1627
1728
1828
1929
2029
2129
2229
2329
2428
2528
2628
2727
2827
2927
3026

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1312244219
2413254118
3413263917
4514273816
5615273715
6716283514
7816283413
8917293312
91017293211
101118293210
11121829319
12131829319
13151829308
14151829308
15161929297
16171929287
17181929287
18191929276
19191929266
20201929266
21221929255
22232029245
23252028234
24262028224
25282028214
26292028203
27312027193
28322027183
29342026173
30352126162

Wind in September

Winds average 5 mph in September.

Across September, 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.

0246810151015202530
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:06 AM to 6:28 AM, and sunset from 6:52 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:066:52
212.76:076:51
312.76:086:49
412.76:096:48
512.66:096:47
612.66:106:45
712.56:116:44
812.56:116:42
912.56:126:41
1012.46:136:39
1112.46:146:38
1212.46:146:36
1312.36:156:35
1412.36:166:33
1512.36:176:32
1612.26:176:30
1712.26:186:29
1812.16:196:27
1912.16:206:26
2012.16:206:24
2112.06:216:23
2212.06:226:21
2312.06:236:20
2411.96:236:18
2511.96:246:17
2611.86:256:15
2711.86:266:14
2811.86:276:13
2911.76:276:11
3011.76:286:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.6 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 6.18 kWh/m² in June across the year — September's 4.6 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.2Bright
284.2Bright
294.2Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Greenville?

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

6.4
Sightseeing
4th-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for Greenville in September

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

In September, Greenville sees daytime highs around 82°F and nights near 63°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Greenville in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greenville 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 Greenville in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Greenville 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 Greenville?

Greenville sits at 34.9°N, 82.4°W, 1,007 ft above sea level, in United States. The nearest listed city is Wade Hampton, 5.0 mi away.

Topography around Greenville

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

Within 2 miles, the terrain around Greenville has only modest variations in elevation — a maximum elevation change of 210 ft around an average of 965 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,434 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,096 ft.

The land around Greenville is covered by trees (57%) and artificial surfaces (36%) within 2 miles, trees (67%) within 10 miles, and trees (82%) within 50 miles.

2 miles
210 ft
10 miles
1,434 ft
50 miles
6,096 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Wade Hampton 5.0 mi · Mauldin 6.8 mi · Taylors 7.5 mi · Greer 11 mi · Simpsonville 11 mi · Easley 12 mi · Spartanburg 27 mi · Clemson 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 Greenville (34.8526°, -82.394°, elevation 1,007 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).