Killarney weather in September

In September, Killarney sees average daytime highs of 28°C and overnight lows near 27°C, with 131 mm of rain across 18.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Killarney's 11th-clearest and 10th-windiest month. For the whole year in context, see Killarney's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
27°
10th coldest
Rainfall
131 mm
18.3 wet days
Daylight
12 h 06 min
6:00 AM – 6:08 PM
Cloud cover
61%
11th clearest
Wind
18 km/h
10th windiest
Solar energy
5.4 kWh/m²
Travel score
4.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Killarney reaches about 28°C in the afternoon and slips back to 27°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12927
22827
32827
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182827
192827
202827
212827
222827
232827
242827
252826
262826
272826
282826
292826
302826

How September really feels in Killarney

Once humidity and wind are folded in, September averages 22 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
22
heat index over the day's high
Days feeling ≤ C
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.

Killarney weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 22°417.710.67.5
Feb23° / 22°325.111.17.9
Mar23° / 22°345.911.87.9
Apr24° / 23°485.612.68.0
May26° / 25°778.513.27.2
Jun27° / 26°8914.113.55.8
Jul28° / 27°7013.813.45.4
Aug29° / 27°11116.312.95.0
Sep28° / 27°13118.312.24.7
Oct27° / 26°13516.511.45.6
Nov25° / 24°71910.87.1
Dec24° / 23°406.910.57.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64852
74753
84753
94753
104753
114753
124753
134753
144753
154753
164753
174753
184753
194753
204654
214753
224654
234555
244555
254555
264555
274357
284456
294456
304555

Chance of precipitation in September

Any precipitation

Killarney gets around 131 mm of rain over 18.3 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 61% and peaks near 67% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
161
261
361
461
561
660
760
860
959
1059
1159
1259
1358
1458
1558
1658
1758
1858
1959
2059
2160
2261
2363
2464
2565
2666
2767
2867
2967
3067

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
103961
204060
314158
414356
514455
614455
714554
814653
914653
1014752
1114851
1214851
1324950
1424949
1525048
1625048
1725147
1825147
1925246
2025345
2125444
2225444
2325543
2425642
2525741
2625741
2725840
2825840
2925939
3025939

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2820light breeze
2920light breeze
3020light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 5:54 AM to 6:05 AM, and sunset from 6:25 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:546:25
212.55:546:24
312.55:556:23
412.45:556:22
512.45:556:21
612.45:566:19
712.45:566:18
812.35:576:17
912.35:576:16
1012.35:576:15
1112.35:586:14
1212.25:586:13
1312.25:596:12
1412.25:596:11
1512.25:596:09
1612.16:006:08
1712.16:006:07
1812.16:006:06
1912.16:016:05
2012.06:016:04
2112.06:026:03
2212.06:026:02
2312.06:026:00
2411.96:035:59
2511.96:035:58
2611.96:045:57
2711.96:045:56
2811.86:045:55
2911.86:055:54
3011.86:055:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.4 kWh/m².

For context, solar energy here swings from a low near 3.48 kWh/m² to a high of 6.59 kWh/m² in July across the year — September's 5.4 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Killarney

In seasonPeak

In September, Killarney sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Killarney sits in the Atlantic hurricane belt; the season peaks August–October.

Killarney's rainy season runs May–November, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Killarney?

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

4.7
Sightseeing
12th-best month of the year
5.5
Beach & pool
12th-best month of the year

September is a reasonable time to visit Killarney for sightseeing.

What to pack for Killarney in September

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

In September, Killarney sees daytime highs around 28°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Killarney in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 30°C and coldest in February near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb24Warm
Mar24Warm
Apr25Warm
May26Warm
Jun28Tropical
Jul29Tropical
Aug30Tropical
Sep29Tropical
Oct28Tropical
Nov27Warm
Dec25Warm

UV index in Killarney in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Killarney peaks around July 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 19UV 12Dec 18UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May11Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep10Extreme
Oct9Very high
Nov6High
Dec5High

Air quality in Killarney 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 Killarney is worst in July — around 21 µg/m³ PM2.5 (moderate), about 4.4× the cleanest month (December, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1620 µg/m³Dec 185 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb5Good
Mar6Good
Apr8Good
May9Good
Jun16Moderate
Jul21Moderate
Aug15Moderate
Sep10Good
Oct8Good
Nov5Good
Dec5Good
Location & terrain

Where is Killarney?

Killarney sits at 25.1°N, 77.4°W, 6 m above sea level, in Bahamas. The nearest listed city is Nassau, 7.0 km away.

LucayaFreeport

Topography around Killarney

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Killarney.

Within 3 km, the terrain around Killarney has only modest variations in elevation — a maximum elevation change of 33 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 33 m.

The land around Killarney is covered by water (31%) and trees (24%) within 3 km, water (76%) within 16 km, and water (88%) within 80 km.

3 km
33 m
16 km
37 m
80 km
33 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Nassau 7.0 km · Lucaya 207 km · Freeport 209 km · Miami Beach 285 km · Sunny Isles Beach 289 km · Miami 290 km · Aventura 291 km · Ojus 292 km

Bahamas travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 96% of US
price level, 2024
GDP per capita
$39,455
2024
Homicide rate
32.2
per 100k, 2022
Road deaths
7.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 70%other Christian 13%Roman Catholic 12%none 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 Killarney (25.05°, -77.4167°, elevation 6 m), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).