Anderson weather in September

In September, Anderson sees average daytime highs of 82°F and overnight lows near 65°F, with 3.6 in of rain across 8.6 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 40% 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 Anderson's 3rd-clearest and 9th-windiest month. For the whole year in context, see Anderson's year-round climate.

Daytime high
82°
4th warmest
Overnight low
65°
9th coldest
Rainfall
3.6 in
8.6 wet days
Daylight
12 h 12 min
6:19 AM – 6:31 PM
Cloud cover
53%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.62 kWh/m²
Travel score
6.3
out of 10

Anderson is city in South Carolina, United States.

Density
723/km²
people per km²
Founded
1826

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 Anderson reaches about 82°F in the afternoon and slips back to 65°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 90°F. Set against its neighbours, September runs about 5°F cooler than August and about 10°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18569
28569
38568
48568
58568
68568
78467
88467
98467
108466
118366
128366
138366
148365
158265
168265
178264
188264
198164
208164
218063
228063
238062
247962
257962
267961
277861
287861
297860
307760

How September really feels in Anderson

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.

Anderson 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° / 35°4.710.11102.9
Feb56° / 37°4.29.40.510.73.8
Mar64° / 44°4.910.20.211.75.7
Apr72° / 52°3.98.8012.86.9
May79° / 61°3.49.4013.86.7
Jun86° / 69°3.912.9014.34.7
Jul89° / 72°3.813.6014.13.8
Aug87° / 71°4.112.4013.34.4
Sep82° / 65°3.68.6012.26.3
Oct72° / 53°3.37011.17.4
Nov62° / 43°3.98.4010.25.7
Dec54° / 37°4.69.90.49.73.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35446
45644
55644
65644
75644
85644
95743
105743
115743
125743
135842
145842
155743
165743
175743
185644
195644
205545
215545
225545
235644
245743
255743
265743
275842
285842
295842
305842

Chance of precipitation in September

Any precipitation

Anderson gets around 3.6 in of rain over 8.6 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 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
329
429
528
628
727
826
926
1026
1126
1226
1326
1426
1527
1627
1728
1828
1929
2029
2130
2230
2330
2430
2529
2629
2728
2828
2928
3027

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
128224226
238234125
339244024
4410253923
5511263821
6511263720
7612273619
8713273518
9813273517
10914283416
111014283415
121015283314
131115283313
141215283213
151316283112
161416283111
171416293011
181516292910
191616292910
20171729289
21181729279
22191729268
23211729258
24221829247
25241829236
26261828226
27271928215
28281927205
29301927195
30312026184

Wind in September

Winds average 5 mph in September.

Across September, 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.

0246810151015202530
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

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 6:08 AM to 6:29 AM, and sunset from 6:53 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:086:53
212.76:086:52
312.76:096:50
412.76:106:49
512.66:116:47
612.66:116:46
712.56:126:44
812.56:136:43
912.56:136:42
1012.46:146:40
1112.46:156:39
1212.46:166:37
1312.36:166:36
1412.36:176:34
1512.26:186:33
1612.26:196:31
1712.26:196:30
1812.16:206:28
1912.16:216:27
2012.16:216:25
2112.06:226:24
2212.06:236:22
2312.06:246:21
2411.96:246:19
2511.96:256:18
2611.86:266:17
2711.86:276:15
2811.86:286:14
2911.76:286:12
3011.76:296:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 6.17 kWh/m² in June across the year — September's 4.62 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
134.8Bright
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
304.2Bright
Planning a trip in September

Is September a good time to visit Anderson?

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

6.3
Sightseeing
4th-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for Anderson in September

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

In September, Anderson sees daytime highs around 82°F and nights near 65°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Anderson 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 Anderson peaks around June 22 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 highHighModerateJun 22UV 9Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Anderson 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 Anderson 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 Anderson?

Anderson sits at 34.5°N, 82.7°W, 787 ft above sea level, in United States. The nearest listed city is Clemson, 16 mi away.

Topography around Anderson

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

Within 2 miles, the terrain around Anderson has only modest variations in elevation — a maximum elevation change of 200 ft around an average of 761 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 390 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,603 ft.

The land around Anderson is covered by trees (63%) and artificial surfaces (20%) within 2 miles, trees (62%) and grassland (28%) within 10 miles, and trees (80%) within 50 miles.

2 miles
200 ft
10 miles
390 ft
50 miles
4,603 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Clemson 16 mi · Easley 23 mi · Mauldin 27 mi · Simpsonville 28 mi · Greenville 28 mi · Wade Hampton 33 mi · Greenwood 35 mi · Taylors 35 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 Anderson (34.5034°, -82.6501°, elevation 787 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).