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Weather & Climate in Dedham, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dedham 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 235 sunny days per year, above the national average. Annual precipitation totals 32.4 inches. The area receives 2.1 inches of snow annually. The city sits at an elevation of 30 feet.
Temperature
41°F Jan (5°C)
63°F Jul (17°C)
| Annual Average | 52.2°F |
| 3% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 235 days/yr |
Geography
| Elevation | 30 ft (9 m) |
| Area | 134.9 sq mi (349.3 km²) |
| Population Density | 8/sq mi |
| Coordinates | 51.9589°N, 0.9934°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
33 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 | 97 km | 10 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 48 km | 10 km |
| May 16, 1998 | 45 km ENE of Hemsby, United Kingdom | M4.2 | 137 km | 10 km |
| Jan 23, 2007 | 57 km ENE of Broadstairs, United Kingdom | M4.1 | 86 km | 10 km |
| Dec 21, 2000 | 38 km NNE of Cromer, United Kingdom | M4.0 | 147 km | 10 km |
| Sep 15, 1994 | 38 km NE of Broadstairs, United Kingdom | M3.9 | 66 km | 10 km |
| Jan 28, 2015 | 2 km WSW of Market Overton, United Kingdom | M3.8 | 144 km | 3 km |
| May 2, 1995 | 51 km NE of Hemsby, United Kingdom | M3.7 | 145 km | 10 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 79 km | 12 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 95 km | 4 km |
| Apr 18, 2014 | 3 km WSW of Market Overton, United Kingdom | M3.5 | 145 km | 2 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 89 km | 10 km |
| Jan 30, 2002 | 25 km NNE of Sheringham, United Kingdom | M3.4 | 136 km | 10 km |
| Jan 21, 1999 | 4 km ENE of Old Leake, United Kingdom | M3.3 | 133 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 122 km | 10 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 127 km | 10 km |
| Jul 2, 2001 | 3 km NNE of Oostduinkerke, Belgium | M3.1 | 149 km | 5 km |
| Nov 25, 1998 | 26 km N of Grand-Fort-Philippe, France | M3.0 | 111 km | 10 km |
| Sep 6, 1993 | 35 km E of Caister-on-Sea, United Kingdom | M3.0 | 117 km | 10 km |
| Nov 5, 1994 | 5 km N of Debenham, United Kingdom | M3.0 | 37 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 | — | 112 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 2.0 in | |
| February | 39°F (4°C) | 1.3 in | Coldest, Driest |
| March | 43°F (6°C) | 1.6 in | |
| April | 46°F (8°C) | 1.7 in | |
| May | 53°F (12°C) | 1.6 in | |
| June | 58°F (15°C) | 2.0 in | |
| July | 63°F (17°C) | 1.5 in | Warmest |
| August | 63°F (17°C) | 1.9 in | |
| September | 58°F (14°C) | 2.0 in | |
| October | 51°F (11°C) | 2.2 in | |
| November | 44°F (7°C) | 2.3 in | Wettest |
| December | 41°F (5°C) | 2.1 in |
Dedham has a seasonal temperature swing of 24°F / from 39°F in February to 63°F in July. Total annual precipitation is 22.0 inches, with November being the wettest month (2.3") and February the driest (1.3").