Dublin weather in September

In September, Dublin sees average daytime highs of 86°F and overnight lows near 68°F, with 3.6 in of rain across 9.3 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 89°F in the first days to 83°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 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 Dublin's 5th-clearest and 9th-windiest month. For the whole year in context, see Dublin's year-round climate.

Daytime high
86°
4th warmest
Overnight low
68°
9th coldest
Rainfall
3.6 in
9.3 wet days
Daylight
12 h 12 min
6:20 AM – 6:32 PM
Cloud cover
54%
5th clearest
Wind
6 mph
9th windiest
Solar energy
4.73 kWh/m²
Travel score
5.0
out of 10

Dublin is city in and the county seat of Laurens County, Georgia, United States.

Density
390/km²
people per km²
Founded
1812

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 89°F in the first days to 83°F by the end.

A typical September day in Dublin reaches about 86°F in the afternoon and slips back to 68°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 94°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
18971
28971
38971
48971
58970
68870
78870
88870
98869
108869
118869
128769
138769
148768
158768
168768
178668
188667
198667
208567
218566
228566
238566
248465
258465
268465
278364
288364
298364
308263

How September really feels in Dublin

Once humidity and wind are folded in, September averages 11 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
11
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Dublin weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 38°3.79.210.14.6
Feb63° / 42°3.88.210.85.6
Mar70° / 47°3.88.811.86.8
Apr78° / 55°3.27.912.87.2
May85° / 64°2.27.813.65.8
Jun89° / 71°4.114.114.13.7
Jul92° / 74°3.915.613.92.8
Aug91° / 73°3.814.813.23.1
Sep86° / 68°3.69.312.25.0
Oct78° / 56°2.76.211.27.5
Nov68° / 46°2.76.710.36.9
Dec61° / 41°3.58.49.95.2

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 19% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25446
35446
45545
55644
65644
75743
85743
95743
105743
115842
125842
135842
145842
155842
165743
175743
185743
195842
205743
215743
225743
235743
245743
255743
265842
275842
285743
295743
305743

Chance of precipitation in September

Any precipitation

Dublin gets around 3.6 in of rain over 9.3 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 31% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
238
337
436
535
634
733
832
931
1030
1129
1229
1329
1428
1529
1629
1729
1829
1930
2030
2130
2230
2330
2429
2529
2628
2728
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 34% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1261334441
2361434430
3361435420
4371535400
5471535380
6481636360
7581636350
8591736330
9691836310
106101836290
117101937280
127101937270
138112036250
148112036240
159112135230
169112135230
1710112235220
1810122234220
1911122234210
2012122233210
2113122233200
2214122232190
2315132231190
2416132131180
2518142130170
2619142130160
2720152129150
2821162029140
2922162028140
3023172028130

Wind in September

Winds average 6 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
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
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 6:10 AM to 6:29 AM, and sunset from 6:52 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:106:52
212.76:116:51
312.66:126:50
412.66:126:48
512.66:136:47
612.56:146:46
712.56:146:44
812.56:156:43
912.46:156:42
1012.46:166:40
1112.46:176:39
1212.36:176:37
1312.36:186:36
1412.36:196:35
1512.26:196:33
1612.26:206:32
1712.26:216:30
1812.16:216:29
1912.16:226:28
2012.16:236:26
2112.06:236:25
2212.06:246:23
2312.06:256:22
2411.96:256:21
2511.96:266:19
2611.96:276:18
2711.86:276:17
2811.86:286:15
2911.86:296:14
3011.76:296:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.73 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 6.34 kWh/m² in May across the year — September's 4.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.7Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.4Bright
294.3Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Dublin?

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

5.0
Sightseeing
8th-best month of the year
6.9
Beach & pool
2nd-best month of the year

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

What to pack for Dublin in September

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

In September, Dublin sees daytime highs around 86°F and nights near 68°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Dublin 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 Dublin peaks around June 23 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 highHighModerateJun 23UV 10Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar6High
Apr7High
May9Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Dublin 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 Dublin is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1619 µg/m³Dec 239 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar13Moderate
Apr11Good
May12Moderate
Jun16Moderate
Jul19Moderate
Aug16Moderate
Sep13Moderate
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Dublin?

Dublin sits at 32.5°N, 82.9°W, 220 ft above sea level, in United States. The nearest listed city is Milledgeville, 42 mi away.

Topography around Dublin

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

Within 2 miles, the terrain around Dublin has only modest variations in elevation — a maximum elevation change of 154 ft around an average of 230 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 266 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 653 ft.

The land around Dublin is covered by trees (69%) within 2 miles, trees (71%) and grassland (20%) within 10 miles, and trees (79%) within 50 miles.

2 miles
154 ft
10 miles
266 ft
50 miles
653 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Milledgeville 42 mi · Warner Robins 42 mi · Macon 47 mi · Perry 48 mi · Statesboro 66 mi · Evans 82 mi · Martinez 83 mi · Tifton 83 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 Dublin (32.5404°, -82.9038°, elevation 220 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).