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Weather & Climate in Letterston, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Letterston experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 42°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 259 sunny days per year, above the national average. Annual precipitation totals 42.4 inches. The city sits at an elevation of 430 feet.
Temperature
42°F Jan (6°C)
60°F Jul (15°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 259 days/yr |
Geography
| Elevation | 430 ft (131 m) |
| Area | 1,188.2 sq mi (3,077.4 km²) |
| Population Density | 1/sq mi |
| Coordinates | 51.9276°N, 4.9914°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
24 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Apr 2, 1990 | 4 km NNE of Presteigne, United Kingdom | M4.7 | 144 km | 18 km |
| Oct 25, 1999 | 10 km N of Hirwaun, United Kingdom | M4.5 | 100 km | 10 km |
| Feb 17, 2018 | 5 km NE of Clydach, United Kingdom | M4.3 | 81 km | 12 km |
| Feb 20, 2014 | 17 km NNW of Ilfracombe, United Kingdom | M4.1 | 85 km | 3 km |
| May 31, 2001 | 20 km NNW of Flexbury, United Kingdom | M4.0 | 106 km | 29 km |
| May 29, 2013 | 14 km WSW of Nefyn, United Kingdom | M3.8 | 108 km | 10 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 130 km | 10 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 143 km | 10 km |
| Mar 17, 1994 | 5 km WNW of Newtown, United Kingdom | M3.5 | 130 km | 10 km |
| Feb 12, 2002 | 1 km SSE of Deri, United Kingdom | M3.5 | 122 km | 8 km |
| Oct 10, 2001 | 2 km SSE of Caerphilly, United Kingdom | M3.5 | 130 km | 10 km |
| Jun 20, 2002 | 3 km N of Marshfield, United Kingdom | M3.4 | 138 km | 14 km |
| Feb 24, 2023 | 1 km ENE of Brynmawr, United Kingdom | M3.4 | 127 km | 10 km |
| Jun 16, 1991 | 11 km WSW of Knighton, United Kingdom | M3.3 | 129 km | 10 km |
| Jul 30, 1999 | 2 km ENE of Bargoed, United Kingdom | M3.3 | 126 km | 6 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 139 km | 9 km |
| Jan 28, 2002 | 1 km S of Abercarn, United Kingdom | M3.0 | 132 km | 10 km |
| Feb 11, 1998 | 4 km SE of Newport, United Kingdom | M2.9 | 146 km | 10 km |
| Aug 17, 1992 | 1 km E of Machen, United Kingdom | M2.9 | 134 km | 10 km |
| May 31, 1998 | 38 km WNW of Northam, United Kingdom | M2.8 | 84 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 4.4 in | |
| February | 41°F (5°C) | 3.2 in | Coldest |
| March | 44°F (7°C) | 3.4 in | |
| April | 46°F (8°C) | 2.6 in | |
| May | 51°F (11°C) | 2.6 in | Driest |
| June | 56°F (13°C) | 2.8 in | |
| July | 60°F (15°C) | 2.6 in | |
| August | 60°F (15°C) | 3.5 in | Warmest |
| September | 57°F (14°C) | 3.5 in | |
| October | 52°F (11°C) | 4.7 in | |
| November | 47°F (8°C) | 4.8 in | Wettest |
| December | 44°F (7°C) | 4.5 in |
Letterston has a seasonal temperature swing of 18°F / from 41°F in February to 60°F in August. Total annual precipitation is 42.5 inches, with November being the wettest month (4.8") and May the driest (2.6").