Martham is drier than 86% of UK towns: 628 mm (25 in) of rain a year
On a normal July day the thermometer tops out near 21.6°C (71°F). Wet weather is most frequent in November and least in April. By frosts alone, it ranks gentler than 81% of UK towns. Warm coats and heating bills mark the months from November to April, when means dip under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in Martham at a glance
Each month’s typical high and low, in °C.
What a year in Martham feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 628 mm of rain a year
November is the wettest month and April the driest. About 14 days a year bring 10 mm (0.4 in) or more. 35th wettest of 52 Norfolk towns of 2,500+.
Rain by month
Millimetres
32 air frosts and 11 days of 25°C a year
On about 32 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 Cambridge NIAB
Cambridge NIAB is 72 miles south-west of Martham, 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 Martham 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 |
|---|---|---|---|
| Martham | 21.6°C | 1.9°C | 628 mm |
| Hemsby 2.6 mi | 21.3°C about the same | 2.2°C about the same | 630 mm |
| Ormesby St Margaret 3.3 mi | 21.6°C about the same | 2.1°C about the same | 627 mm |
| Caister-on-Sea 5.4 mi | 21.6°C about the same | 2.3°C about the same | 567 mm |
| Acle 5.6 mi | 22.1°C 0.5°C warmer | 2.1°C about the same | 631 mm |
| Sutton 5.6 mi | 21.7°C about the same | 2.1°C about the same | 666 mm |
| Stalham 6.4 mi | 21.2°C about the same | 2.2°C about the same | 667 mm |
Martham 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 | 1.9°C 35°F | 4.6°C | 51 mm 2.0 in |
| February | 7.9°C 46°F | 2.0°C 36°F | 4.9°C | 42 mm 1.7 in |
| March | 10.2°C 50°F | 3.2°C 38°F | 6.7°C | 41 mm 1.6 in |
| April | 13.0°C 55°F | 4.9°C 41°F | 8.9°C | 32 mm 1.3 in |
| May | 16.2°C 61°F | 7.8°C 46°F | 12.0°C | 40 mm 1.6 in |
| June | 19.1°C 66°F | 10.5°C 51°F | 14.8°C | 51 mm 2.0 in |
| July | 21.6°C 71°F | 12.7°C 55°F | 17.1°C | 61 mm 2.4 in |
| August | 21.8°C 71°F | 12.7°C 55°F | 17.3°C | 58 mm 2.3 in |
| September | 19.0°C 66°F | 10.8°C 51°F | 14.9°C | 55 mm 2.2 in |
| October | 14.9°C 59°F | 8.2°C 47°F | 11.5°C | 62 mm 2.5 in |
| November | 10.7°C 51°F | 4.6°C 40°F | 7.7°C | 71 mm 2.8 in |
| December | 7.9°C 46°F | 2.4°C 36°F | 5.1°C | 64 mm 2.5 in |
| Year | 14.1°C | 6.8°C | 10.5°C | 628 mm |
Where Martham’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 Martham’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 Cambridge NIAB, 72 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 Martham’s climate
How warm does Martham get in summer?
August is the warmest month, with average highs of 21.8°C (71°F). About 11 days a year reach 25°C (77°F), more than 52% of UK towns.
How cold does Martham get in winter?
January nights average 1.9°C (35°F). The air drops below freezing on about 32 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Martham get?
About 628 mm (25 in) a year, less than 86% of UK towns. November is the wettest month (71 mm) and April the driest (32 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 Martham. 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 Martham →
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.