Roscommon Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Roscommon.
Climate overview of Roscommon
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 January.
Rainfall is high, totalling around 1095 mm (43 in) per year. December is the wettest month and March the driest. The city also experiences pleasant summers and cold winters. May is the sunniest month, averaging 5.2 hours of sunshine per day.
Roscommon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Roscommon - and find the best time to visit.
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 January.
At night, you can expect temperatures ranging from 12°C (54°F) in July to around 3°C (37°F) during January.
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
Daily hours of sunshine
Daily percentage of sunshine
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
Best Time to Visit Roscommon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Roscommon
What is the best time to visit Roscommon?
July typically offers the most optimal weather in Roscommon. In contrast, January, February and December tend to have less optimal conditions. Roscommon has pleasant summers and cold winters.
What temperatures can I expect in Roscommon?
Daytime highs range from 9°C (48°F) in January to 20°C (68°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Roscommon get?
Annual rainfall is around 1095 mm (43 in). December is the wettest month with 100 mm (3.9 in), while March is the driest with 79 mm (3.1 in).
How sunny is Roscommon?
Roscommon receives around 1,114 hours of sunshine per year. May is the sunniest month with 157 hours, while December is the cloudiest with just 35 hours.
Roscommon 3-Day Forecast
Roscommon on the map
Roscommon is highlighted - select any city to see its climate.
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