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Weather & Climate in Mount Merrion, Ireland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Merrion experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 44°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 225 sunny days per year, above the national average. Annual precipitation totals 41.7 inches. The area receives 3.6 inches of snow annually. The city sits at an elevation of 144 feet.
Temperature
44°F Jan (6°C)
60°F Jul (15°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 44°F (6°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 225 days/yr |
Geography
| Elevation | 144 ft (44 m) |
| Area | 48.5 sq mi (125.5 km²) |
| Population Density | 162/sq mi |
| Coordinates | 53.3001°N, 6.2150°W |
| Timezone | Europe/Dublin |
Precipitation & Snow
Air Quality
Earthquake History
7 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| May 29, 2013 | 14 km WSW of Nefyn, United Kingdom | M3.8 | 110 km | 10 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 122 km | 10 km |
| Feb 10, 1994 | 2 km NNE of Tregarth, United Kingdom | M3.3 | 143 km | 10 km |
| Sep 1, 1999 | 4 km SSW of Llanfairfechan, United Kingdom | M3.3 | 147 km | 10 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 126 km | 9 km |
| Jun 26, 2013 | 14 km WSW of Nefyn, United Kingdom | M2.8 | 110 km | 8 km |
| Oct 16, 1998 | 1 km WSW of Y Felinheli, United Kingdom | M2.7 | 133 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (6°C) | 4.0 in | |
| February | 40°F (5°C) | 3.1 in | Coldest |
| March | 43°F (6°C) | 3.0 in | |
| April | 45°F (7°C) | 2.6 in | |
| May | 50°F (10°C) | 2.7 in | |
| June | 55°F (13°C) | 2.7 in | |
| July | 60°F (15°C) | 2.6 in | Warmest, Driest |
| August | 58°F (14°C) | 3.4 in | |
| September | 54°F (12°C) | 3.4 in | |
| October | 49°F (10°C) | 4.0 in | |
| November | 43°F (6°C) | 3.7 in | |
| December | 41°F (5°C) | 4.2 in | Wettest |
Mount Merrion has a seasonal temperature swing of 20°F / from 40°F in February to 60°F in July. Total annual precipitation is 39.3 inches, with December being the wettest month (4.2") and July the driest (2.6").