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Weather & Climate in Londonderry County Borough, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Londonderry County Borough 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 224 sunny days per year, above the national average. Annual precipitation totals 61.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 79 feet.
Temperature
40°F Jan (4°C)
58°F Jul (14°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 40°F (4°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 224 days/yr |
Geography
| Elevation | 79 ft (24 m) |
| Area | 149.4 sq mi (387.0 km²) |
| Population Density | 583/sq mi |
| Coordinates | 54.9972°N, 7.3092°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| May 3, 1998 | Scotland, United Kingdom | M3.5 | 143 km | 15 km |
| Jan 26, 1990 | 34 km N of Isle of Islay, United Kingdom | M3.0 | 138 km | 10 km |
| Aug 27, 1992 | 33 km NNE of Isle of Islay, United Kingdom | M2.7 | 143 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 6.2 in | Coldest |
| February | 40°F (5°C) | 4.6 in | |
| March | 43°F (6°C) | 4.9 in | |
| April | 46°F (8°C) | 3.7 in | |
| May | 50°F (10°C) | 3.4 in | Driest |
| June | 54°F (12°C) | 3.8 in | |
| July | 58°F (14°C) | 4.1 in | Warmest |
| August | 58°F (14°C) | 5.0 in | |
| September | 54°F (12°C) | 5.6 in | |
| October | 50°F (10°C) | 6.5 in | |
| November | 44°F (7°C) | 6.9 in | Wettest |
| December | 41°F (5°C) | 6.9 in |
Londonderry County Borough has a seasonal temperature swing of 18°F / from 40°F in January to 58°F in July. Total annual precipitation is 61.5 inches, with November being the wettest month (6.9") and May the driest (3.4").