County Roscommon Climate and Average Weather
Climate of County Roscommon: average temperatures, rainfall and seasons month by month.
Climate in County Roscommon month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 44° | 35° | 3,7 in | ★★☆☆☆ |
| February | 48° | 39° | 4,1 in | ★★★☆☆ |
| March | 51° | 39° | 3,7 in | ★★★☆☆ |
| April | 55° | 41° | 4,3 in | ★★★☆☆ |
| May | 61° | 47° | 2,9 in | ★★★★☆ |
| June | 63° | 50° | 4,4 in | ★★★★☆ |
| July | 66° | 53° | 2,6 in | ★★★★☆ |
| August | 65° | 53° | 4,1 in | ★★★★☆ |
| September | 61° | 50° | 2,8 in | ★★★★☆ |
| October | 56° | 47° | 4,9 in | ★★★☆☆ |
| November | 50° | 41° | 4,2 in | ★★★☆☆ |
| December | 48° | 40° | 4,7 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Recent extremes in County Roscommon
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How County Roscommon compares with nearby places
Annual averages, and the difference against County Roscommon.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| County Longford | 20 mi | 50°F | about the same | 46 in |
| County Leitrim | 27 mi | 49°F | 33°F cooler | 60 in |
| County Westmeath | 36 mi | 50°F | about the same | 42 in |
| County Cavan | 40 mi | 50°F | about the same | 42 in |
| County Mayo | 42 mi | 51°F | about the same | 56 in |
Best time to visit County Roscommon
Go in July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
Summary
County Roscommon is a county in Ireland. County Roscommon is a county in Ireland. It has a population of about 70.000.
The best time to visit County Roscommon is July and August. The climate is temperate. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 66°F, while January is the coldest with lows near 35°F.
The closest major airport is Dublin Airport (DUB), about 85 mi away. Nearby highlights include Snowdonia National Park and Lake District National Park.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about County Roscommon
Weather map for County Roscommon
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore County Roscommon
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is County Roscommon?
County Roscommon is a county in Ireland. Its coordinates are 53.7593, -8.2682. It lies in Europe.
When is the best time to visit County Roscommon?
July and August offer the most comfortable conditions in County Roscommon, which has a temperate climate. January, February and December are usually the hardest months for outdoor plans.
How many people live in County Roscommon?
County Roscommon has a population of approximately 70.000.
What is the nearest airport to County Roscommon?
The closest airports are Dublin Airport (DUB), 85 mi away.
What are the top things to do in County Roscommon?
Popular options include Snowdonia National Park and Lake District National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (ie-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 28, 2026 UTC. Live blocks refresh every 15 minutes; climate averages monthly.
