Week St Mary sits near the top of UK towns for mild winters
Expect July afternoons of about 19.5°C (67°F). December is the wettest month, April the driest. Rain is plentiful here, more than falls on 87% of UK towns. Frost greets about 30 mornings a year, so leave time to clear the car.
Met Office 1991–2020 averages for the town itself.
A year in Week St Mary at a glance
Each month’s typical high and low, in °C.
What a year in Week St Mary feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,139 mm of rain a year
December is the wettest month and April the driest. About 34 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
30 air frosts and 5 days of 25°C a year
On about 30 nights a year the air drops below freezing; days that stay below freezing are rare. About 5 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 Chivenor
Chivenor is 28 miles north-east of Week St Mary, 6 m (20 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 | 9.1°C | 3.6°C | 91 mm | 5.4 |
| February | 9.4°C | 3.4°C | 70 mm | 5.0 |
| March | 11.2°C | 4.5°C | 60 mm | 2.6 |
| April | 13.7°C | 5.9°C | 56 mm | 0.9 |
| May | 16.5°C | 8.6°C | 55 mm | 0.0 |
| June | 19.0°C | 11.4°C | 68 mm | 0.0 |
| July | 20.7°C | 13.3°C | 74 mm | 0.0 |
| August | 20.5°C | 13.4°C | 77 mm | 0.0 |
| September | 18.8°C | 11.5°C | 70 mm | 0.0 |
| October | 15.4°C | 9.1°C | 107 mm | 0.4 |
| November | 12.1°C | 6.2°C | 106 mm | 1.8 |
| December | 9.9°C | 4.3°C | 107 mm | 4.6 |
| Year | 14.7°C | 7.9°C | 941 mm | 21 |
Met Office historic station data, Chivenor, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Week St Mary 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 Cornwall 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 |
|---|---|---|---|
| Week St Mary | 19.5°C | 3.2°C | 1,139 mm |
| Stratton 5.4 mi | 19.8°C about the same | 3.7°C about the same | 929 mm |
| Bude 5.5 mi | 19.8°C about the same | 4.0°C 0.9°C milder | 917 mm |
| Holsworthy 7.7 mi | 20.0°C about the same | 2.6°C 0.6°C colder | 1,172 mm |
| Launceston 10.0 mi | 20.4°C 0.9°C warmer | 2.7°C about the same | 1,269 mm |
| Withnoe 10.9 mi | 20.8°C 1.3°C warmer | 3.0°C about the same | 1,154 mm |
| Camelford 12.0 mi | 18.7°C 0.9°C cooler | 2.9°C about the same | 1,406 mm |
Week St Mary 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 | 8.6°C 47°F | 3.2°C 38°F | 5.9°C | 118 mm 4.6 in |
| February | 8.7°C 48°F | 2.9°C 37°F | 5.8°C | 102 mm 4.0 in |
| March | 10.4°C 51°F | 3.9°C 39°F | 7.1°C | 75 mm 2.9 in |
| April | 12.6°C 55°F | 5.0°C 41°F | 8.8°C | 62 mm 2.5 in |
| May | 15.5°C 60°F | 7.6°C 46°F | 11.5°C | 65 mm 2.6 in |
| June | 17.9°C 64°F | 10.3°C 51°F | 14.1°C | 72 mm 2.8 in |
| July | 19.5°C 67°F | 12.2°C 54°F | 15.9°C | 82 mm 3.2 in |
| August | 19.4°C 67°F | 12.3°C 54°F | 15.8°C | 86 mm 3.4 in |
| September | 17.8°C 64°F | 10.4°C 51°F | 14.1°C | 77 mm 3.0 in |
| October | 14.6°C 58°F | 8.2°C 47°F | 11.4°C | 126 mm 5.0 in |
| November | 11.3°C 52°F | 5.5°C 42°F | 8.4°C | 137 mm 5.4 in |
| December | 9.1°C 48°F | 3.5°C 38°F | 6.3°C | 137 mm 5.4 in |
| Year | 13.8°C | 7.1°C | 10.4°C | 1,139 mm |
Where Week St Mary’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 Week St Mary’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 Chivenor, 28 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 Week St Mary’s climate
How warm does Week St Mary get in summer?
July is the warmest month, with average highs of 19.5°C (67°F). About 5 days a year reach 25°C (77°F), fewer than 78% of UK towns.
How cold does Week St Mary get in winter?
February nights average 2.9°C (37°F). The air drops below freezing on about 30 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Week St Mary get?
About 1,139 mm (45 in) a year, more than 87% of UK towns. December is the wettest month (137 mm) and April the driest (62 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 Week St Mary. 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 Week St Mary →
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.