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Weather & Climate in Llanfaethlu, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Llanfaethlu experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 47°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 230 sunny days per year, above the national average. Annual precipitation totals 50.9 inches (wetter than the 38-inch national average). The area receives 6.1 inches of snow annually. The city sits at an elevation of 240 feet.
Temperature
47°F Jan (8°C)
60°F Jul (15°C)
| Annual Average | 50.1°F |
| 7% below US avg | |
| January Average | 47°F (8°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 230 days/yr |
Geography
| Elevation | 240 ft (73 m) |
| Area | 3.6 sq mi (9.3 km²) |
| Population Density | 159/sq mi |
| Coordinates | 53.3524°N, 4.5342°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
14 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 | 54 km | 10 km |
| Feb 14, 2005 | 2 km SW of Conwy, United Kingdom | M3.8 | 46 km | 5 km |
| Mar 7, 1996 | 3 km SW of Clive, United Kingdom | M3.8 | 134 km | 10 km |
| Apr 28, 2009 | 3 km WSW of Flookburgh, United Kingdom | M3.7 | 135 km | 9 km |
| May 30, 2022 | 2 km ESE of Prees, United Kingdom | M3.6 | 138 km | 10 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 23 km | 10 km |
| Mar 17, 1994 | 5 km WNW of Newtown, United Kingdom | M3.5 | 120 km | 10 km |
| Feb 10, 1994 | 2 km NNE of Tregarth, United Kingdom | M3.3 | 34 km | 10 km |
| Sep 1, 1999 | 4 km SSW of Llanfairfechan, United Kingdom | M3.3 | 38 km | 10 km |
| Jun 16, 1991 | 11 km WSW of Knighton, United Kingdom | M3.3 | 146 km | 10 km |
| Aug 25, 2013 | 23 km W of Cleveleys, United Kingdom | M3.2 | 95 km | 8 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 29 km | 9 km |
| Jun 26, 2013 | 14 km WSW of Nefyn, United Kingdom | M2.8 | 54 km | 8 km |
| Oct 16, 1998 | 1 km WSW of Y Felinheli, United Kingdom | M2.7 | 28 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 47°F (8°C) | 3.3 in | |
| February | 42°F (5°C) | 2.5 in | Coldest |
| March | 44°F (7°C) | 2.7 in | |
| April | 47°F (8°C) | 2.1 in | |
| May | 52°F (11°C) | 1.8 in | Driest |
| June | 56°F (13°C) | 2.0 in | |
| July | 60°F (15°C) | 2.1 in | |
| August | 60°F (16°C) | 2.7 in | Warmest |
| September | 57°F (14°C) | 3.0 in | |
| October | 52°F (11°C) | 3.6 in | |
| November | 47°F (8°C) | 4.1 in | Wettest |
| December | 44°F (7°C) | 3.7 in |
Llanfaethlu has a seasonal temperature swing of 18°F / from 42°F in February to 60°F in August. Total annual precipitation is 33.6 inches, with November being the wettest month (4.1") and May the driest (1.8").