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County Cork (Cork)
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Ireland weather

Weather in County Cork for September 2025

Your guide to County Cork weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in County Cork is slightly cooler than the historical average by -1.4 °C.

  • Expect cooler weather in the next days in County Cork with the forecast suggesting a temperature of 14.8 °C, lower than the historical average.

  • In general, the average temperature in County Cork at the beginning of September is 18.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15 °C by the end of September.

    • Rain 🌧️

  • County Cork in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 115.4 mm.

Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/10°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
83 %
Avg humidity

County Cork Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
18°
2
Patchy rain possible
18°
3
Overcast
19°
4
Sunny
18°
5
Patchy rain possible
18°
6
Mist
20°
7
Patchy rain possible
19°
8
Patchy rain possible
20°
9
Partly cloudy
21°
10
Moderate or heavy rain shower
18°
11
Light rain shower
15°
12
Partly cloudy
15°
13
Overcast
14°
14
Moderate rain
17°
15
Moderate rain
15°
16
Moderate rain
15°
17
Patchy rain possible
18°
18
Moderate rain
17°
19
Patchy rain possible
16°
20
Patchy rain possible
12°
21
Cloudy
12°
22
Patchy rain possible
13°
23
Partly cloudy
15°
24
Mist
17°
25
Patchy rain possible
14°
26
Patchy rain possible
13°
27
Overcast
15°
28
Sunny
15°
29
Partly cloudy
15°
30
Light rain shower
16°

Temperatures trend during September in County Cork

See the weather trend as well as the moving average line

September weather in County Cork day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 18° /11° 2.7 mm 4
2 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 1 mm 5
3 Sept. Overcast
Overcast
 19° /9° 4.3 mm 4
4 Sept. Sunny
Sunny
 18° /8° 0.8 mm 4
5 Sept. Patchy rain possible
Patchy rain possible
 18° /9° 3.8 mm 4
6 Sept. Mist
Mist
 20° /13° 2.3 mm 5
7 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 1.6 mm 4
8 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 0.8 mm 5
9 Sept. Partly cloudy
Partly cloudy
 21° /11° 3.8 mm 5
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /12° 4 mm 4
11 Sept. Light rain shower
Light rain shower
 15° /8° 3.9 mm 3
12 Sept. Partly cloudy
Partly cloudy
 15° /6° 3.3 mm 4
13 Sept. Overcast
Overcast
 14° /5° 0.5 mm 3
14 Sept. Moderate rain
Moderate rain
 17° /9° 8.5 mm 4
15 Sept. Moderate rain
Moderate rain
 15° /9° 5.4 mm 4
16 Sept. Moderate rain
Moderate rain
 15° /9° 19.4 mm 0.6
17 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 2 mm 0.8
18 Sept. Moderate rain
Moderate rain
 17° /13° 6.5 mm 0.3
19 Sept. Patchy rain possible
Patchy rain possible
 16° /9° 1.5 mm 0.4
20 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 2.5 mm 0.6
21 Sept. Cloudy
Cloudy
 12° /7° 0 mm 2
22 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 0.1 mm 2
23 Sept. Partly cloudy
Partly cloudy
 15° /4° 0 mm 3
24 Sept. Mist
Mist
 17° /8° 0 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 14° /7° 1 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 2.7 mm 3
27 Sept. Overcast
Overcast
 15° /8° 0.1 mm 3
28 Sept. Sunny
Sunny
 15° /6° 0 mm 3
29 Sept. Partly cloudy
Partly cloudy
 15° /6° 0 mm 3
30 Sept. Light rain shower
Light rain shower
 16° /9° 11.7 mm 4
Next
Important Notice
Our weather forecast for County Cork in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the County Cork forecast closer to your planned date for the most up-to-date weather information.
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County Cork in September - FAQ

What are the expected maximum and minimum temperatures in County Cork during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in County Cork during September?
Significant rainfall exceeding 115.4 mm is expected in County Cork during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in County Cork during September?
The average wind speed in County Cork during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in County Cork

Explore the daily rainfall trends and prepare for County Corks September weather 💧

UV exposure in County Cork during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is County Cork?

Get accurate weather forecasts for County Cork, located at latitude 51.898 and longitude -8.471. Stay updated with localized weather information tailored for County Cork.

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