Summer warmth: King's Lynn logs more 25-degree days than 84% of UK towns
Deep winter brings January lows near 1.7°C (35°F). Its yearly rainfall falls short of 75% of UK towns. From frosty January to warm July, readings climb 21°C. Plan time outside from June to September, when highs sit at 19–22°C.
Met Office 1991–2020 averages for the town itself.
A year in King's Lynn at a glance
Each month’s typical high and low, in °C.
What a year in King's Lynn feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 667 mm of rain a year
November is the wettest month and March the driest. About 14 days a year bring 10 mm (0.4 in) or more. 19th wettest of 52 Norfolk towns of 2,500+.
Rain by month
Millimetres
38 air frosts and 18 days of 25°C a year
On about 38 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 18 days a year reach 25°C (77°F).
Day counts are 1991–2020 averages from the Met Office’s 2 km grid. The Met Office calls a day of 25°C or more a summer day and a night below 0°C an air frost; ground frosts, on grass, come more often.
The Met Office station at Cambridge NIAB
Cambridge NIAB is 38 miles south of King's Lynn, 26 m (85 ft) above sea level. It is the nearest of the 37 long-running stations the Met Office publishes in full; at that distance read it for sunshine and the station’s own record, not as the town’s figures.
| Month | High | Low | Rain | Air frosts |
|---|---|---|---|---|
| January | 7.7°C | 1.9°C | 49 mm | 9.0 |
| February | 8.3°C | 1.8°C | 36 mm | 8.7 |
| March | 11.0°C | 3.1°C | 33 mm | 5.2 |
| April | 14.1°C | 4.7°C | 38 mm | 2.6 |
| May | 17.4°C | 7.4°C | 43 mm | 0.6 |
| June | 20.4°C | 10.5°C | 49 mm | 0.0 |
| July | 23.1°C | 12.6°C | 48 mm | 0.0 |
| August | 22.9°C | 12.6°C | 56 mm | 0.0 |
| September | 19.6°C | 10.5°C | 51 mm | 0.0 |
| October | 15.1°C | 7.9°C | 59 mm | 0.7 |
| November | 10.7°C | 4.5°C | 53 mm | 3.7 |
| December | 8.0°C | 2.2°C | 50 mm | 9.2 |
| Year | 14.9°C | 6.6°C | 563 mm | 40 |
Met Office historic station data, Cambridge NIAB, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How King's Lynn compares
Against the 2,537 towns and cities of 2,500 or more across the UK, each with its own Met Office averages, and its place among Norfolk towns that size.
Nearby towns’ climate
The nearest towns of 1,000+ within 12 miles: a hill, a valley or the sea can make a real difference over a few miles.
| Town | July high | January low | Rain a year |
|---|---|---|---|
| King's Lynn | 22.4°C | 1.7°C | 667 mm |
| Clenchwarton 2.9 mi | 22.2°C about the same | 1.7°C about the same | 631 mm |
| West Winch 3.0 mi | 22.4°C about the same | 1.7°C about the same | 611 mm |
| Terrington St Clement 5.3 mi | 22.2°C about the same | 1.6°C about the same | 619 mm |
| Gayton 5.6 mi | 22.3°C about the same | 1.4°C about the same | 695 mm |
| Watlington 6.1 mi | 22.5°C about the same | 1.5°C about the same | 610 mm |
| Dersingham 7.0 mi | 22.1°C about the same | 1.5°C about the same | 687 mm |
King's Lynn weather by month
Average daily high and low, mean temperature and rain, 1991–2020, for the town itself (the Met Office’s HadUK-Grid).
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 7.3°C 45°F | 1.7°C 35°F | 4.5°C | 55 mm 2.2 in |
| February | 8.1°C 47°F | 1.8°C 35°F | 4.9°C | 44 mm 1.7 in |
| March | 10.7°C 51°F | 3.0°C 37°F | 6.8°C | 41 mm 1.6 in |
| April | 13.8°C 57°F | 4.8°C 41°F | 9.3°C | 41 mm 1.6 in |
| May | 17.0°C 63°F | 7.7°C 46°F | 12.3°C | 46 mm 1.8 in |
| June | 19.8°C 68°F | 10.4°C 51°F | 15.1°C | 61 mm 2.4 in |
| July | 22.4°C 72°F | 12.4°C 54°F | 17.4°C | 66 mm 2.6 in |
| August | 22.5°C 72°F | 12.3°C 54°F | 17.4°C | 61 mm 2.4 in |
| September | 19.3°C 67°F | 10.2°C 50°F | 14.7°C | 59 mm 2.3 in |
| October | 14.9°C 59°F | 7.6°C 46°F | 11.3°C | 64 mm 2.5 in |
| November | 10.4°C 51°F | 4.3°C 40°F | 7.3°C | 67 mm 2.6 in |
| December | 7.6°C 46°F | 2.0°C 36°F | 4.8°C | 61 mm 2.4 in |
| Year | 14.5°C | 6.5°C | 10.5°C | 667 mm |
Where King's Lynn’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 7 Met Office 2 km grid squares whose centre lies inside King's Lynn’s built-up area.
- Highs and lows: the Met Office publishes average daily maxima and minima on its 12 km grid; each is moved by the difference between the town’s 2 km mean temperature and the 12 km square’s, which carries the town’s own height and setting over.
- Weather station and sunshine: Met Office historic station data for Cambridge NIAB, 38 miles away, months of 1991–2020 averaged.
- Comparisons: every town and city of 2,500 or more across the UK, all four nations, read the same way.
Met Office HadUK-Grid · Met Office Climate Data Portal · Historic station data. Open Government Licence v3.0.
Questions about King's Lynn’s climate
How warm does King's Lynn get in summer?
August is the warmest month, with average highs of 22.5°C (72°F). About 18 days a year reach 25°C (77°F), more than 84% of UK towns.
How cold does King's Lynn get in winter?
January nights average 1.7°C (35°F). The air drops below freezing on about 38 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does King's Lynn get?
About 667 mm (26 in) a year, less than 75% of UK towns. November is the wettest month (67 mm) and March the driest (41 mm).
Where do these figures come from?
The Met Office’s HadUK-Grid 1991–2020 averages, which turn thousands of weather stations into a map of the UK in 2 km squares; the page reads the squares inside King's Lynn. They are 30-year averages, not a forecast.
Contains Met Office data © Crown copyright 2026, Open Government Licence v3.0. HadUK-Grid 1991–2020 averages via the Met Office Climate Data Portal; station averages from Met Office historic station data. Today’s forecast for King's Lynn →
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.