The climate in Roscommon during September can be summarized as mild and a little damp.
September is in the fall / autumn in Roscommon and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 8°C (47°F) is normal.
Daytime temperature | 19.9°C 67.7°F |
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Nightly temperature | 8.2°C 46.7°F |
Average temperature | 14°C 57.2°F |
Daily sunshine | 7 hrs |
Avg rainfall | 88 mm 3.5 ins |
Rainy days | 12 days |
Sea temperature | 17.1°C 62.8°F |
Humidity | 79% |
Windspeed | 13kph 8 mph |
On average September is the wettest month of the year in Roscommon with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
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 Roscommon in September 2024.
Best places to visit in September
Hottest month: | July | 26.1°C 79°F |
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Driest month: | February | 29mm 1.1ins |
Sunniest month: | July | 10.7hrs |
Coldest month: | January | -3.9°C 25°F |
Wettest month: | September | 88mm 3.5ins |