Tullamore Weather in September
What's the weather like in Tullamore (Leinster) in September 2025?
The climate in Tullamore during September can be summarized as mild and a little damp.
September is in the fall / autumn in Tullamore and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 8°C (47°F) is normal.
| Daytime temperature | 16.7°C 62.1°F |
|---|---|
| Nightly temperature | 8.3°C 46.9°F |
| Average temperature | 12.5°C 54.5°F |
| Daily sunshine | 4 hrs |
| Avg rainfall | 80 mm 3.2 ins |
| Rainy days | 17 days |
| Sea temperature | 15°C 59°F |
| Humidity | 85% |
| Windspeed | 13.7kph 9 mph |
On average September is the 4th wettest month of the year in Tullamore with around 80mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 17 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 Tullamore
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 Tullamore in September 2025.
Other monthly averages
Best places to visit in September
Tullamore weather stats
| Hottest month: | July | 19.2°C 66.6°F |
|---|---|---|
| Driest month: | April | 56mm 2.2ins |
| Sunniest month: | May | 5.8hrs |
| Coldest month: | January | 7.1°C 44.8°F |
| Wettest month: | December | 87mm 3.4ins |
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