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Weather & Climate in Castlebar, Ireland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castlebar experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 41°F in January while summers reach 58°F in July / relatively mild seasonal variation. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 46.6 inches (wetter than the 38-inch national average). The city sits at an elevation of 157 feet.
Temperature
41°F Jan (5°C)
58°F Jul (15°C)
| Annual Average | 48.8°F |
| 10% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 58°F (15°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 157 ft (48 m) |
| Area | 459.2 sq mi (1,189.3 km²) |
| Population Density | 28/sq mi |
| Coordinates | 53.8500°N, 9.3000°W |
| Timezone | Europe/Dublin |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Jun 6, 2012 | 60 km W of Belmullet, Ireland | M4.0 | 110 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 5.0 in | Coldest |
| February | 41°F (5°C) | 3.4 in | |
| March | 43°F (6°C) | 3.9 in | |
| April | 46°F (8°C) | 2.6 in | Driest |
| May | 51°F (11°C) | 3.0 in | |
| June | 55°F (13°C) | 2.7 in | |
| July | 58°F (15°C) | 2.7 in | Warmest |
| August | 58°F (14°C) | 3.6 in | |
| September | 55°F (13°C) | 4.1 in | |
| October | 50°F (10°C) | 5.0 in | |
| November | 45°F (7°C) | 5.3 in | Wettest |
| December | 43°F (6°C) | 5.2 in |
Castlebar has a seasonal temperature swing of 17°F / from 41°F in January to 58°F in July. Total annual precipitation is 46.6 inches, with November being the wettest month (5.3") and April the driest (2.6").