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Weather & Climate in Letterkenny, Ireland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Letterkenny experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 40°F in January while summers reach 58°F in July / relatively mild seasonal variation. The area gets 207 sunny days per year. Annual precipitation totals 70.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 26 feet.
Temperature
40°F Jan (5°C)
58°F Jul (14°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 207 days/yr |
Geography
| Elevation | 26 ft (8 m) |
| Area | 18.4 sq mi (47.8 km²) |
| Population Density | 1,045/sq mi |
| Coordinates | 54.9500°N, 7.7333°W |
| Timezone | Europe/Dublin |
Precipitation & Snow
Air Quality
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 7.8 in | Coldest, Wettest |
| February | 41°F (5°C) | 5.6 in | |
| March | 43°F (6°C) | 5.8 in | |
| April | 46°F (8°C) | 4.1 in | |
| May | 50°F (10°C) | 3.8 in | Driest |
| June | 54°F (12°C) | 4.1 in | |
| July | 58°F (14°C) | 4.9 in | Warmest |
| August | 58°F (14°C) | 5.5 in | |
| September | 54°F (12°C) | 6.3 in | |
| October | 50°F (10°C) | 7.8 in | |
| November | 45°F (7°C) | 7.6 in | |
| December | 42°F (5°C) | 7.6 in |
Letterkenny has a seasonal temperature swing of 18°F / from 40°F in January to 58°F in July. Total annual precipitation is 70.9 inches, with January being the wettest month (7.8") and May the driest (3.8").