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Ireland weather

Weather in Cobh for September 2025

Your guide to Cobh weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Cobh has been nearly identical to the historical average, with a temperature of 16.4 °C (showing only a slight deviation of -0.4 °C).

  • Expect cooler weather in the next days in Cobh with the forecast suggesting a temperature of 15.4 °C, lower than the historical average.

  • In general, the average temperature in Cobh at the beginning of September is 17.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 15 °C by the end of September.

    • Rain 🌧️

  • Cobh experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 134.8 mm.

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
16°/9°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Cobh Weather September

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

Temperatures trend during September in Cobh

See the weather trend as well as the moving average line

September weather in Cobh day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 17.8 mm 4
2 Sept. Overcast
Overcast
 17° /10° 1.8 mm 4
3 Sept. Patchy rain possible
Patchy rain possible
 18° /8° 6.4 mm 4
4 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 1.5 mm 4
5 Sept. Cloudy
Cloudy
 17° /7° 2.1 mm 4
6 Sept. Cloudy
Cloudy
 19° /13° 3.4 mm 5
7 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 2.3 mm 4
8 Sept. Cloudy
Cloudy
 18° /9° 0.8 mm 4
9 Sept. Partly cloudy
Partly cloudy
 19° /9° 5.8 mm 5
10 Sept. Moderate rain at times
Moderate rain at times
 16° /10° 1.2 mm 4
11 Sept. Patchy rain possible
Patchy rain possible
 14° /7° 0.9 mm 3
12 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 4.9 mm 3
13 Sept. Overcast
Overcast
 14° /5° 0.8 mm 3
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /9° 8.2 mm 4
15 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.2 mm 0.9
16 Sept. Moderate rain
Moderate rain
 16° /11° 9.5 mm 0.8
17 Sept. Moderate rain
Moderate rain
 17° /14° 7.7 mm 0.2
18 Sept. Moderate rain
Moderate rain
 17° /15° 17.2 mm 0.3
19 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.4 mm 0.3
20 Sept. Moderate rain
Moderate rain
 13° /11° 13.4 mm 3
21 Sept. Moderate rain
Moderate rain
 14° /13° 8.1 mm 3
22 Sept. Moderate rain
Moderate rain
 15° /13° 6.8 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 3.5 mm 3
24 Sept. Sunny
Sunny
 17° /11° 0 mm 4
25 Sept. Partly cloudy
Partly cloudy
 15° /10° 0 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 2.1 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 0.8 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 0.2 mm 3
29 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /10° 52.4 mm 3
30 Sept. Patchy rain possible
Patchy rain possible
 15° /7° 0.2 mm 4
Next
Important Notice
Our weather forecast for Cobh 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 Cobh forecast closer to your planned date for the most up-to-date weather information.
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Cobh in September - FAQ

What are the expected maximum and minimum temperatures in Cobh during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cobh during September?
Significant rainfall exceeding 134.8 mm is expected in Cobh during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cobh during September?
The average wind speed in Cobh during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Cobh

Explore the daily rainfall trends and prepare for Cobhs September weather 💧

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Location coordinates Where is Cobh?

Get accurate weather forecasts for Cobh, located at latitude 51.85 and longitude -8.295. Stay updated with localized weather information tailored for Cobh.

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