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° | 3,4 in | ★★★★☆ |
| September | 61° | 50° | 4,0 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 | 62 in |
| County Westmeath | 36 mi | 50°F | about the same | 42 in |
| County Sligo | 37 mi | 50°F | about the same | 66 in |
| Sligo | 37 mi | 50°F | about the same | 66 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.
What this means for County Roscommon
Today is slightly cooler than average for August. The forecast high of 62°F is 3.4°F below the 65°F typical for this month.
A 12% chance means most of the area stays dry; a passing shower is possible but short.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 52°F.
What to pack, what to skip
- Layers - the daily swing is 55°F, so mornings feel nothing like afternoons
- A packable rain shell - 4 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
County Roscommon is a county in Ireland. County Roscommon is a county in Ireland. It has a population of about 70.000.
Right now it is 53°F (12°C) in County Roscommon with overcast. It feels like 51°F. Today runs from 46°F to 62°F. Chance of precipitation is 12%. Sightseeing conditions score 8.9/10 - excellent - go now.
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.
In plain terms. Today is slightly cooler than average for August. The forecast high of 62°F is 3.4°F below the 65°F typical for this month. The best window to be outside is roughly 4 PM to 7 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in County Roscommon today at 9.5/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
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.
What is the weather like in County Roscommon right now?
It is currently 53°F (12°C) with overcast. Humidity is 83% and wind is 5 mph.
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.
What time zone is County Roscommon in?
County Roscommon observes Europe/Dublin (UTC+01:00). The local time is 2:30 PM.
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 August 22, 2026 at 2:30 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
