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Weather & Climate in Grantham, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grantham experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 40°F in January while summers reach 61°F in July. The area gets 217 sunny days per year. Annual precipitation totals 37.0 inches. The area receives 5.4 inches of snow annually. The city sits at an elevation of 210 feet.
Temperature
40°F Jan (5°C)
61°F Jul (16°C)
| Annual Average | 51.4°F |
| 5% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 217 days/yr |
Geography
| Elevation | 210 ft (64 m) |
| Area | 466.5 sq mi (1,208.3 km²) |
| Population Density | 94/sq mi |
| Coordinates | 52.9115°N, 0.6418°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
46 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Feb 27, 2008 | 1 km NNE of Market Rasen, United Kingdom | M4.8 | 58 km | 18 km |
| Sep 22, 2002 | 2 km ESE of Wombourn, United Kingdom | M4.8 | 111 km | 9 km |
| Feb 15, 1994 | 7 km ESE of Thetford, United Kingdom | M4.4 | 117 km | 10 km |
| Oct 21, 2002 | 1 km ESE of Manchester, United Kingdom | M4.3 | 123 km | 5 km |
| Oct 28, 2001 | 5 km E of Long Clawson, United Kingdom | M4.2 | 16 km | 12 km |
| Jun 9, 2018 | 7 km NNE of Withernsea, United Kingdom | M4.1 | 109 km | 10 km |
| Sep 23, 2000 | 1 km WSW of Warwick, United Kingdom | M4.0 | 96 km | 13 km |
| Mar 7, 1996 | 3 km SW of Clive, United Kingdom | M3.8 | 143 km | 10 km |
| Jan 28, 2015 | 2 km WSW of Market Overton, United Kingdom | M3.8 | 21 km | 3 km |
| Oct 24, 2002 | 2 km WNW of Droylsden, United Kingdom | M3.8 | 121 km | 4 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 120 km | 10 km |
| Oct 21, 2002 | 0 km N of Longdendale, United Kingdom | M3.7 | 110 km | 5 km |
| Feb 8, 1990 | 2 km E of Mansfield, United Kingdom | M3.6 | 43 km | 10 km |
| May 30, 2022 | 2 km ESE of Prees, United Kingdom | M3.6 | 133 km | 10 km |
| Oct 22, 2002 | 0 km S of Droylsden, United Kingdom | M3.5 | 118 km | 4 km |
| Apr 18, 2014 | 3 km WSW of Market Overton, United Kingdom | M3.5 | 22 km | 2 km |
| Feb 29, 2004 | 0 km SW of Diggle, United Kingdom | M3.4 | 116 km | 12 km |
| Jan 30, 2002 | 25 km NNE of Sheringham, United Kingdom | M3.4 | 132 km | 10 km |
| Feb 17, 1992 | 1 km W of Warboys, United Kingdom | M3.4 | 68 km | 10 km |
| Oct 23, 2002 | 0 km WSW of Droylsden, United Kingdom | M3.3 | 119 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 2.2 in | |
| February | 39°F (4°C) | 1.7 in | Coldest, Driest |
| March | 42°F (6°C) | 1.9 in | |
| April | 46°F (8°C) | 1.9 in | |
| May | 52°F (11°C) | 1.9 in | |
| June | 57°F (14°C) | 2.2 in | |
| July | 61°F (16°C) | 1.9 in | Warmest |
| August | 61°F (16°C) | 2.4 in | Wettest |
| September | 56°F (13°C) | 2.1 in | |
| October | 50°F (10°C) | 2.2 in | |
| November | 43°F (6°C) | 2.3 in | |
| December | 40°F (5°C) | 2.3 in |
Grantham has a seasonal temperature swing of 23°F / from 39°F in February to 61°F in July. Total annual precipitation is 24.9 inches, with August being the wettest month (2.4") and February the driest (1.7").