Frost comes to Thornham less often than to 89% of UK towns
Midsummer highs settle at about 21.6°C (71°F). Its yearly rainfall falls short of 71% of UK towns. A year here swings 20°C from midwinter lows to midsummer highs. The heating season runs November to April: each of those months averages under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in Thornham at a glance
Each month’s typical high and low, in °C.
What a year in Thornham feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 680 mm of rain a year
November is the wettest month and March the driest. About 12 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Waddington
26 air frosts and 11 days of 25°C a year
On about 26 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 11 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 Waddington
Waddington is 49 miles west of Thornham, 68 m (223 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 | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.0°C | 1.6°C | 48 mm | 9.1 | 61 |
| February | 7.7°C | 1.7°C | 38 mm | 8.4 | 84 |
| March | 10.2°C | 3.0°C | 36 mm | 4.7 | 122 |
| April | 13.2°C | 4.9°C | 44 mm | 1.2 | 162 |
| May | 16.3°C | 7.6°C | 47 mm | 0.1 | 203 |
| June | 19.1°C | 10.5°C | 60 mm | 0.0 | 182 |
| July | 21.6°C | 12.7°C | 60 mm | 0.0 | 197 |
| August | 21.4°C | 12.6°C | 59 mm | 0.0 | 184 |
| September | 18.3°C | 10.5°C | 53 mm | 0.0 | 141 |
| October | 14.1°C | 7.6°C | 61 mm | 0.3 | 106 |
| November | 9.9°C | 4.3°C | 57 mm | 2.9 | 69 |
| December | 7.2°C | 2.0°C | 52 mm | 8.6 | 60 |
| Year | 13.8°C | 6.6°C | 616 mm | 35 | 1,571 |
Met Office historic station data, Waddington, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Thornham 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 |
|---|---|---|---|
| Thornham | 21.6°C | 2.0°C | 680 mm |
| Hunstanton 4.5 mi | 22.2°C 0.6°C warmer | 1.7°C about the same | 606 mm |
| Heacham 5.6 mi | 22.4°C 0.8°C warmer | 1.7°C about the same | 612 mm |
| Snettisham 6.9 mi | 22.4°C 0.7°C warmer | 1.4°C 0.6°C colder | 635 mm |
| Dersingham 8.6 mi | 22.1°C about the same | 1.5°C 0.5°C colder | 687 mm |
| Wells-next-the-Sea 10.9 mi | 21.5°C about the same | 2.3°C about the same | 632 mm |
Thornham 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 | 2.0°C 36°F | 4.6°C | 53 mm 2.1 in |
| February | 7.5°C 46°F | 1.6°C 35°F | 4.6°C | 47 mm 1.9 in |
| March | 9.8°C 50°F | 2.9°C 37°F | 6.4°C | 44 mm 1.7 in |
| April | 12.9°C 55°F | 4.8°C 41°F | 8.8°C | 46 mm 1.8 in |
| May | 16.1°C 61°F | 7.6°C 46°F | 11.9°C | 47 mm 1.9 in |
| June | 19.0°C 66°F | 10.4°C 51°F | 14.7°C | 63 mm 2.5 in |
| July | 21.6°C 71°F | 12.7°C 55°F | 17.2°C | 61 mm 2.4 in |
| August | 21.6°C 71°F | 12.7°C 55°F | 17.2°C | 66 mm 2.6 in |
| September | 18.5°C 65°F | 10.5°C 51°F | 14.5°C | 51 mm 2.0 in |
| October | 14.4°C 58°F | 7.8°C 46°F | 11.1°C | 67 mm 2.6 in |
| November | 10.2°C 50°F | 4.3°C 40°F | 7.3°C | 70 mm 2.7 in |
| December | 7.3°C 45°F | 1.9°C 35°F | 4.6°C | 65 mm 2.6 in |
| Year | 13.8°C | 6.6°C | 10.2°C | 680 mm |
Where Thornham’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the Met Office 2 km grid square nearest Thornham’s centre (the town is smaller than one square).
- 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 Waddington, 49 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 Thornham’s climate
How warm does Thornham get in summer?
July is the warmest month, with average highs of 21.6°C (71°F). About 11 days a year reach 25°C (77°F), fewer than 51% of UK towns.
How cold does Thornham get in winter?
February nights average 1.6°C (35°F). The air drops below freezing on about 26 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Thornham get?
About 680 mm (27 in) a year, less than 71% of UK towns. November is the wettest month (70 mm) and March the driest (44 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Waddington (49 miles away), averages 1,571 hours of bright sunshine a year. Sunshine isn’t on the town grid, so this is the station’s figure.
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 Thornham. 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 Thornham →
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