Loch Garman Weather in September
What's the weather like in Loch Garman (Leinster) in September 2025?
The climate in Loch Garman during September can be summarized as mild and a little damp.
September is in the fall / autumn in Loch Garman and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 17°C (62°F), whilst at night 10°C (51°F) is normal.
| Daytime temperature | 16.7°C 62°F |
|---|---|
| Nightly temperature | 10.4°C 50.6°F |
| Average temperature | 13.5°C 56.3°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 84 mm 3.3 ins |
| Rainy days | 15 days |
| Sea temperature | 15.5°C 59.9°F |
| Humidity | 84% |
| Windspeed | 18kph 11 mph |
On average September is the 5th wettest month of the year in Loch Garman with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
September temperatures in Loch Garman
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 Loch Garman in September 2025.
Other monthly averages
Best places to visit in September
Loch Garman weather stats
| Hottest month: | July | 18.3°C 64.9°F |
|---|---|---|
| Driest month: | June | 56mm 2.2ins |
| Sunniest month: | May | 7.2hrs |
| Coldest month: | February | 7.8°C 46°F |
| Wettest month: | January | 109mm 4.3ins |
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