South Fulton weather in September

In September, South Fulton sees average daytime highs of 83°F and overnight lows near 64°F, with 3.5 in of rain across 8.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 85°F in the first days to 79°F by the end. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels muggy.

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

Daytime high
83°
4th warmest
Overnight low
64°
9th coldest
Rainfall
3.5 in
8.6 wet days
Daylight
12 h 12 min
6:27 AM – 6:39 PM
Cloud cover
53%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.65 kWh/m²
Travel score
6.2
out of 10

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 79°F by the end.

A typical September day in South Fulton reaches about 83°F in the afternoon and slips back to 64°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 90°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18668
28668
38568
48567
58567
68567
78567
88566
98466
108466
118466
128465
138465
148365
158365
168364
178364
188264
198264
208263
218163
228162
238162
248062
258061
268061
277961
287960
297960
307859

How September really feels in South Fulton

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.

South Fulton weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan53° / 35°4.2100.6103.2
Feb58° / 38°4.49.70.310.84.1
Mar65° / 45°4.410.20.111.75.9
Apr73° / 52°3.48.7012.87.0
May80° / 61°2.99.5013.76.5
Jun86° / 68°3.714.2014.24.5
Jul88° / 71°4.315.50143.8
Aug87° / 70°3.713.1013.24.2
Sep83° / 64°3.58.6012.26.2
Oct73° / 53°2.86.8011.27.4
Nov63° / 43°3.88010.36.0
Dec56° / 38°4.210.30.29.83.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25545
35446
45545
55545
65644
75644
85644
95743
105743
115743
125743
135743
145743
155743
165644
175644
185545
195545
205446
215545
225545
235545
245644
255644
265644
275743
285743
295743
305743

Chance of precipitation in September

Any precipitation

South Fulton gets around 3.5 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 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
234
333
432
531
631
730
829
928
1027
1127
1227
1326
1426
1526
1627
1727
1827
1927
2028
2128
2228
2328
2428
2527
2627
2727
2826
2926
3025

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
138224325
238234323
349234221
449244220
5510254119
6611264018
7612263916
8713273815
9814273714
10915273613
111016273513
121116273412
131117273312
141218273211
151318273111
161419273011
171519272911
181519262911
191619262810
201819262710
211919262610
22201926269
23221925259
24231925248
25251925248
26271924237
27281924226
28301924226
29311923215
30321923215

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 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
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 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 60 minutes over September. Sunrise moves from 6:16 AM to 6:37 AM, and sunset from 7:00 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:167:00
212.76:176:59
312.76:186:58
412.66:196:56
512.66:196:55
612.66:206:53
712.56:216:52
812.56:216:51
912.56:226:49
1012.46:236:48
1112.46:236:46
1212.36:246:45
1312.36:256:43
1412.36:256:42
1512.26:266:41
1612.26:276:39
1712.26:286:38
1812.16:286:36
1912.16:296:35
2012.16:306:33
2112.06:306:32
2212.06:316:31
2312.06:326:29
2411.96:326:28
2511.96:336:26
2611.86:346:25
2711.86:356:23
2811.86:356:22
2911.76:366:21
3011.76:376:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.65 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 6.11 kWh/m² in May across the year — September's 4.65 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.8Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.7Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit South Fulton?

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

6.2
Sightseeing
4th-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for South Fulton in September

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

In September, South Fulton sees daytime highs around 83°F and nights near 64°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in South Fulton 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 South Fulton peaks around July 11 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 11UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in South Fulton 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 South Fulton is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1620 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr12Good
May14Moderate
Jun17Moderate
Jul21Moderate
Aug17Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is South Fulton?

South Fulton sits at 33.6°N, 84.7°W, 797 ft above sea level, in United States. The nearest listed city is Union City, 7.5 mi away.

Topography around South Fulton

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

Within 2 miles, the terrain around South Fulton has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 922 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 594 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,791 ft.

The land around South Fulton is covered by trees (89%) within 2 miles, trees (80%) within 10 miles, and trees (82%) within 50 miles.

2 miles
285 ft
10 miles
594 ft
50 miles
1,791 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Union City 7.5 mi · Douglasville 12 mi · Lithia Springs 14 mi · Peachtree City 14 mi · East Point 15 mi · Riverdale 15 mi · Fayetteville 16 mi · Newnan 16 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 South Fulton (33.5926°, -84.6729°, elevation 797 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).