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Weather & Climate in Swanley, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Swanley experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 64°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 31.7 inches. The area receives 3.0 inches of snow annually. The city sits at an elevation of 266 feet.
Temperature
41°F Jan (5°C)
64°F Jul (18°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 234 days/yr |
Geography
| Elevation | 266 ft (81 m) |
| Area | 277.4 sq mi (718.5 km²) |
| Population Density | 79/sq mi |
| Coordinates | 51.3972°N, 0.1732°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
34 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Apr 28, 2007 | 1 km WNW of Lympne, United Kingdom | M4.6 | 68 km | 10 km |
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 149 km | 1 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 119 km | 10 km |
| Jan 23, 2007 | 57 km ENE of Broadstairs, United Kingdom | M4.1 | 139 km | 10 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 144 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 115 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 123 km | 2 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 142 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 88 km | 12 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 147 km | 10 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 77 km | 4 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 113 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 39 km | 10 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 101 km | 10 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 122 km | 5 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 125 km | 10 km |
| Nov 25, 1998 | 26 km N of Grand-Fort-Philippe, France | M3.0 | 134 km | 10 km |
| May 1, 1997 | 21 km W of Fort-Mahon-Plage, France | M3.0 | 141 km | 5 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 120 km | 5 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 59 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1858 | NORTH SEA | Unknown | 6.0 m | - | 108 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | - | 81 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 2.7 in | Wettest |
| February | 40°F (4°C) | 1.7 in | Coldest, Driest |
| March | 43°F (6°C) | 1.9 in | |
| April | 47°F (8°C) | 1.7 in | |
| May | 53°F (12°C) | 1.8 in | |
| June | 59°F (15°C) | 2.1 in | |
| July | 64°F (18°C) | 1.7 in | Warmest |
| August | 63°F (17°C) | 1.9 in | |
| September | 58°F (14°C) | 2.3 in | |
| October | 51°F (11°C) | 2.5 in | |
| November | 45°F (7°C) | 2.6 in | |
| December | 41°F (5°C) | 2.5 in |
Swanley has a seasonal temperature swing of 24°F / from 40°F in February to 64°F in July. Total annual precipitation is 25.4 inches, with January being the wettest month (2.7") and February the driest (1.7").