Athens weather in September

In September, Athens sees average daytime highs of 83°F and overnight lows near 64°F, with 3.6 in of rain across 8.2 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 86°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 Athens's 3rd-clearest and 9th-windiest month. For the whole year in context, see Athens's year-round climate.

Daytime high
83°
4th warmest
Overnight low
64°
9th coldest
Rainfall
3.6 in
8.2 wet days
Daylight
12 h 12 min
6:22 AM – 6:34 PM
Cloud cover
53%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.62 kWh/m²
Travel score
6.2
out of 10

Athens is consolidated city-county and county seat of Clarke County, Georgia, United States.

Density
416/km²
people per km²
Founded
1806

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 86°F in the first days to 79°F by the end.

A typical September day in Athens 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
38668
48568
58567
68567
78567
88567
98566
108466
118466
128465
138465
148365
158365
168364
178264
188264
198264
208263
218163
228162
238162
248062
258061
268061
277961
287960
297960
307860

How September really feels in Athens

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.

Athens 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°4.410.30.6103.1
Feb57° / 38°4.49.50.410.74.1
Mar65° / 44°4.59.90.111.75.9
Apr73° / 52°3.68.8012.87.0
May80° / 60°3.39.5013.76.6
Jun86° / 68°4.013.8014.24.5
Jul89° / 71°4.014.50143.7
Aug88° / 70°4.312.9013.34.2
Sep83° / 64°3.68.2012.26.2
Oct73° / 53°3.36.8011.17.4
Nov63° / 43°3.68.2010.25.9
Dec55° / 37°4.410.40.39.83.6

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 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 (%)
15347
25347
35446
45446
55446
65545
75545
85644
95644
105743
115743
125842
135842
145842
155842
165842
175743
185743
195743
205644
215545
225545
235644
245644
255644
265743
275743
285743
295743
305743

Chance of precipitation in September

Any precipitation

Athens gets around 3.6 in of rain over 8.2 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 27% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
329
428
527
627
726
825
925
1024
1124
1224
1324
1425
1525
1626
1727
1828
1928
2029
2129
2229
2329
2429
2529
2629
2728
2828
2927
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 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 (%)
137214327
238224225
339234124
449244023
5510253921
6511253820
7612263719
8712273617
9813283516
10913283515
11914293414
121015293313
131115293213
141216293212
151316293112
161417283011
171417283011
181517282910
191617282810
201717282810
21191827279
22201827279
23211826268
24231926258
25251925247
26261924246
27282024236
28292023225
29312023215
30322123204

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 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 6:11 AM to 6:32 AM, and sunset from 6:55 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:116:55
212.76:126:54
312.76:126:53
412.66:136:51
512.66:146:50
612.66:156:48
712.56:156:47
812.56:166:46
912.56:176:44
1012.46:176:43
1112.46:186:41
1212.46:196:40
1312.36:196:38
1412.36:206:37
1512.26:216:36
1612.26:226:34
1712.26:226:33
1812.16:236:31
1912.16:246:30
2012.16:246:28
2112.06:256:27
2212.06:266:25
2312.06:276:24
2411.96:276:22
2511.96:286:21
2611.86:296:20
2711.86:306:18
2811.86:306:17
2911.76:316:15
3011.76:326:14

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 2.34 kWh/m² to a high of 6.12 kWh/m² in June across the year — September's 4.62 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
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
234.4Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit Athens?

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
7.1
Beach & pool
1st-best month of the year

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

What to pack for Athens in September

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

In September, Athens sees daytime highs around 83°F and nights near 64°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Athens 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 Athens peaks around June 21 at about 10 (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 21UV 10Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Athens 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 Athens is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1719 µg/m³Jan 127 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb11Good
Mar13Moderate
Apr12Good
May13Moderate
Jun17Moderate
Jul20Moderate
Aug17Moderate
Sep13Moderate
Oct13Moderate
Nov11Good
Dec8Good
Location & terrain

Where is Athens?

Athens sits at 34.0°N, 83.4°W, 748 ft above sea level, in United States. The nearest listed city is Winder, 20 mi away.

Topography around Athens

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

Within 2 miles, the terrain around Athens has only modest variations in elevation — a maximum elevation change of 246 ft around an average of 712 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 512 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,349 ft.

The land around Athens is covered by trees (61%) and artificial surfaces (28%) within 2 miles, trees (72%) and grassland (21%) within 10 miles, and trees (78%) within 50 miles.

2 miles
246 ft
10 miles
512 ft
50 miles
2,349 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Winder 20 mi · Gainesville 35 mi · Lawrenceville 35 mi · Snellville 37 mi · Sugar Hill 39 mi · Suwanee 40 mi · Conyers 42 mi · Duluth 44 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 Athens (33.9609°, -83.3779°, elevation 748 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).