Roscommon Weather & Climate: Best Time to Visit

The climate in Roscommon, Roscommon County, Ireland, sees a moderate range of temperatures across the year, from 20°C (68°F) in July down to 9°C (48°F) in February.

Rainfall is high, totalling around 1095 mm (43 in) per year. December is the wettest month and March the driest. May is the sunniest month, averaging 5.2 hours of sunshine per day.

Monthly Temperature in Roscommon

The climate in Roscommon experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in July, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like February.

At night, you can expect temperatures ranging from 12°C (54°F) in July to around 3°C (37°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Roscommon

Roscommon experiences significant rainfall throughout the year, averaging 1095 mm (43 in) of precipitation annually. Year-round, Roscommon has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 100 mm (3.9 in), and the driest month, March, with 79 mm (3.1 in), is minimal. For more details, please visit our Roscommon Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Sunshine Hours in Roscommon

Seasonal changes in sunshine hours are quite dramatic in Roscommon. While May receives considerable daily sunshine with up to 5.2 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.2 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Claremorris, Ireland (53 KM, 32 Miles).

Daily hours of sunshine

Data from: Claremorris, Ireland (53 KM, 32 Miles).

Daily percentage of sunshine

Data from: Claremorris, Ireland (53 KM, 32 Miles).

Humidity in Roscommon by Month

The city experiences its highest humidity in January, reaching 90%. In May, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

Data from: Claremorris, Ireland (53 KM, 32 Miles).

Roscommon 3-Day Forecast

10-Day Forecast

Select a Month

Check the conditions for any month of the year.

Best Time to Visit Roscommon

The best time to visit Roscommon is during June, July and August, when the weather provides comfortable temperatures between 18°C (65°F) and 20°C (67°F). With rainfall of 92 mm (3.6 in) to 98 mm (3.9 in), you can expect pleasant weather during your visit in these months.

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