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Weather & Climate in Rathfarnham, Ireland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rathfarnham experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 42°F in January while summers reach 59°F in July / relatively mild seasonal variation. The area gets 203 sunny days per year. Annual precipitation totals 43.2 inches. The area receives 8.2 inches of snow annually. The city sits at an elevation of 161 feet.
Temperature
42°F Jan (6°C)
59°F Jul (15°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 59°F (15°C) |
| Sunny Days | 203 days/yr |
Geography
| Elevation | 161 ft (49 m) |
| Area | 98.1 sq mi (254.2 km²) |
| Population Density | 177/sq mi |
| Coordinates | 53.3006°N, 6.2828°W |
| Timezone | Europe/Dublin |
Precipitation & Snow
Air Quality
Earthquake History
6 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 | 114 km | 10 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 127 km | 10 km |
| Feb 10, 1994 | 2 km NNE of Tregarth, United Kingdom | M3.3 | 147 km | 10 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 130 km | 9 km |
| Jun 26, 2013 | 14 km WSW of Nefyn, United Kingdom | M2.8 | 114 km | 8 km |
| Oct 16, 1998 | 1 km WSW of Y Felinheli, United Kingdom | M2.7 | 137 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°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 | 59°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 |
Rathfarnham has a seasonal temperature swing of 18°F / from 40°F in February to 59°F in July. Total annual precipitation is 39.3 inches, with December being the wettest month (4.2") and July the driest (2.6").