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Weather & Climate in Harleston, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Harleston experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 41°F in January while summers reach 63°F in July. The area gets 230 sunny days per year, above the national average. Annual precipitation totals 35.5 inches. The area receives 2.0 inches of snow annually. The city sits at an elevation of 112 feet.
Temperature
41°F Jan (5°C)
63°F Jul (17°C)
| Annual Average | 52.0°F |
| 4% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 230 days/yr |
Geography
| Elevation | 112 ft (34 m) |
| Area | 449.9 sq mi (1,165.3 km²) |
| Population Density | 10/sq mi |
| Coordinates | 52.4030°N, 1.2966°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
31 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 | 148 km | 10 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 31 km | 10 km |
| Aug 6, 2015 | 59 km ENE of Mundesley, United Kingdom | M4.2 | 104 km | 4 km |
| May 16, 1998 | 45 km ENE of Hemsby, United Kingdom | M4.2 | 86 km | 10 km |
| Jan 23, 2007 | 57 km ENE of Broadstairs, United Kingdom | M4.1 | 102 km | 10 km |
| Dec 21, 2000 | 38 km NNE of Cromer, United Kingdom | M4.0 | 94 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 93 km | 10 km |
| Jan 28, 2015 | 2 km WSW of Market Overton, United Kingdom | M3.8 | 141 km | 3 km |
| May 2, 1995 | 51 km NE of Hemsby, United Kingdom | M3.7 | 93 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 123 km | 12 km |
| Sep 20, 1994 | 55 km NE of Mundesley, United Kingdom | M3.6 | 106 km | 10 km |
| Sep 27, 2003 | North Sea | M3.5 | 115 km | 10 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 143 km | 4 km |
| Apr 18, 2014 | 3 km WSW of Market Overton, United Kingdom | M3.5 | 142 km | 2 km |
| Jan 30, 2002 | 25 km NNE of Sheringham, United Kingdom | M3.4 | 85 km | 10 km |
| Aug 12, 2005 | 82 km NE of Mundesley, United Kingdom | M3.4 | 131 km | 10 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 94 km | 10 km |
| Jan 21, 1999 | 4 km ENE of Old Leake, United Kingdom | M3.3 | 104 km | 10 km |
| Jul 16, 2007 | 91 km NE of Mundesley, United Kingdom | M3.3 | 135 km | 10 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 17 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.9 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 145 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 2.1 in | |
| February | 39°F (4°C) | 1.5 in | Coldest, Driest |
| March | 43°F (6°C) | 1.7 in | |
| April | 46°F (8°C) | 1.6 in | |
| May | 52°F (11°C) | 1.6 in | |
| June | 57°F (14°C) | 2.0 in | |
| July | 63°F (17°C) | 1.9 in | Warmest |
| August | 62°F (17°C) | 2.2 in | |
| September | 57°F (14°C) | 2.1 in | |
| October | 51°F (11°C) | 2.3 in | |
| November | 44°F (7°C) | 2.5 in | Wettest |
| December | 41°F (5°C) | 2.3 in |
Harleston has a seasonal temperature swing of 24°F / from 39°F in February to 63°F in July. Total annual precipitation is 23.9 inches, with November being the wettest month (2.5") and February the driest (1.5").