Cahersiveen Weather in September
What's the weather like in Cahersiveen (Munster) in September 2025?
The climate in Cahersiveen during September can be summarized as mild and wet.
September is in the fall / autumn in Cahersiveen and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 16°C (61°F), whilst at night 10°C (50°F) is normal.
| Daytime temperature | 16.2°C 61.2°F |
|---|---|
| Nightly temperature | 10°C 50°F |
| Average temperature | 13.1°C 55.6°F |
| Daily sunshine | 4 hrs |
| Avg rainfall | 131 mm 5.2 ins |
| Rainy days | 20 days |
| Sea temperature | 15.5°C 59.9°F |
| Humidity | 87% |
| Windspeed | 18.7kph 12 mph |
On average September is the 5th wettest month of the year in Cahersiveen with around 131mm 5.2 inches of rain making it a wet time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 4 hours of sunshine per day.
September temperatures in Cahersiveen
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cahersiveen in September 2025.
Other monthly averages
Best places to visit in September
Cahersiveen weather stats
| Hottest month: | July | 17.4°C 63.3°F |
|---|---|---|
| Driest month: | July | 78mm 3.1ins |
| Sunniest month: | May | 6.3hrs |
| Coldest month: | February | 8.6°C 47.5°F |
| Wettest month: | January | 175mm 6.9ins |
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