Ballincollig weather in September

In September, Ballincollig sees average daytime highs of 16°C and overnight lows near 10°C, with 64 mm of rain across 10 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 15°C by the end. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Ballincollig's 9th-clearest and 9th-windiest month. For the whole year in context, see Ballincollig's year-round climate.

Daytime high
16°
4th warmest
Overnight low
10°
10th coldest
Rainfall
64 mm
10 wet days
Daylight
12 h 24 min
6:17 AM – 6:40 PM
Cloud cover
77%
9th clearest
Wind
14 km/h
9th windiest
Solar energy
2.88 kWh/m²
Travel score
4.8
out of 10

Ballincollig is town in County Cork, Ireland.

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 17°C in the first days to 15°C by the end.

A typical September day in Ballincollig reaches about 16°C in the afternoon and slips back to 10°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 18°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11711
21711
31711
41711
51711
61711
71711
81711
91711
101711
111711
121710
131610
141610
151610
161610
171610
181610
191610
201610
211610
221610
231610
241610
251510
26159
27159
28159
29159
30159

How September really feels in Ballincollig

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
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.

Ballincollig 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 (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 79130.38.11.3
Feb / 64110.59.61.4
Mar10° / 6211.80.311.52.0
Apr12° / 6912.60.113.62.8
May14° / 6713015.43.7
Jun17° / 10°6410.9016.44.9
Jul18° / 12°6711.80165.4
Aug18° / 12°6911.6014.45.4
Sep16° / 10°6410012.44.8
Oct13° / 8512.4010.43.4
Nov10° / 801208.62.2
Dec / 8412.80.27.61.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12278
22278
32278
42278
52377
62278
72278
82278
92377
102278
112278
122278
132278
142278
152278
162278
172278
182179
192179
202179
212179
222080
232080
242179
252080
262179
272278
282179
292278
302278

Chance of precipitation in September

Any precipitation

Ballincollig gets around 64 mm of rain over 10 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 33% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
229
329
430
530
630
731
831
932
1032
1132
1232
1333
1433
1533
1633
1733
1833
1933
2034
2134
2235
2336
2436
2537
2638
2738
2838
2938
3038

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
170273
271263
371263
471263
572253
672253
772253
873243
974233
1075232
1176222
1277212
1377212
1479201
1579201
1680191
1780191
1882180
1982180
2083170
2183170
2283170
2384160
2484160
2584160
2685150
2785150
2886140
2986140
3087130

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:52 AM to 6:41 AM, and sunset from 7:16 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:527:16
213.35:537:14
313.35:557:12
413.25:577:09
513.15:587:07
613.16:007:05
713.06:027:02
812.96:037:00
912.96:056:57
1012.86:076:55
1112.76:086:53
1212.76:106:50
1312.66:126:48
1412.56:136:45
1512.56:156:43
1612.46:176:40
1712.36:196:38
1812.36:206:36
1912.26:226:33
2012.16:246:31
2112.16:256:28
2212.06:276:26
2311.96:296:24
2411.86:306:21
2511.86:326:19
2611.76:346:16
2711.66:356:14
2811.66:376:11
2911.56:396:09
3011.46:416:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.88 kWh/m².

For context, solar energy here swings from a low near 0.6 kWh/m² to a high of 5.16 kWh/m² in June across the year — September's 2.88 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.4Moderate
43.4Moderate
53.3Moderate
63.3Moderate
73.3Moderate
83.2Moderate
93.2Moderate
103.1Moderate
113.1Moderate
123.0Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.7Moderate
212.7Moderate
222.6Moderate
232.6Moderate
242.5Moderate
252.5Moderate
262.4Moderate
272.4Moderate
282.3Moderate
292.3Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Ballincollig?

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

4.8
Sightseeing
4th-best month of the year
0.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Ballincollig for sightseeing.

What to pack for Ballincollig in September

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

In September, Ballincollig sees daytime highs around 16°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Ballincollig in September

The nearest coast averages about 16°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 km away) is warmest in August at about 16°C and coldest in March near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar9Bracing
Apr10Bracing
May12Bracing
Jun14Bracing
Jul16Cool
Aug16Cool
Sep16Cool
Oct14Bracing
Nov12Bracing
Dec10Bracing

UV index in Ballincollig in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ballincollig peaks around August 12 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Ballincollig?

Ballincollig sits at 51.9°N, 8.6°W, 27 m above sea level, in Ireland. The nearest listed city is Cork, 8.0 km away.

KillarneyCluain MealaLimerickTraleeWaterford

Topography around Ballincollig

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

Within 3 km, the terrain around Ballincollig has only modest variations in elevation — a maximum elevation change of 149 m around an average of 45 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 248 m; within 80 km, large variations in elevation — a maximum elevation change of 984 m.

The land around Ballincollig is covered by grassland (62%) and trees (20%) within 3 km, grassland (70%) within 16 km, and grassland (57%) and water (29%) within 80 km.

3 km
149 m
16 km
248 m
80 km
984 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cork 8.0 km · Douglas 10 km · Carrigaline 15 km · Killarney 66 km · Cluain Meala 80 km · Limerick 87 km · Tralee 88 km · Waterford 109 km

Ireland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$131,592
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
Religion
Roman Catholic 69%none 15%Protestant 4%Orthodox 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 Ballincollig (51.8833°, -8.5833°, elevation 27 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).