Westhumble sits near the top of UK towns for frosts
In July the day’s top temperature is typically 22.7°C (73°F). The rainiest month is November; the driest is June. By warm days alone, it ranks hotter than 94% of UK towns. Plan time outside from June to September, when highs sit at 19–23°C.
Met Office 1991–2020 averages for the town itself.
A year in Westhumble at a glance
Each month’s typical high and low, in °C.
What a year in Westhumble feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 804 mm of rain a year
November is the wettest month and June the driest. About 22 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Heathrow
A frosty town: 63 air frosts and 21 days of 25°C a year
On about 63 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 21 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 Heathrow
Heathrow is 16 miles north of Westhumble, 25 m (82 ft) above sea level. It is the nearest of the 37 long-running stations the Met Office publishes in full.
| Month | High | Low | Rain | Air frosts | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.4°C | 2.7°C | 59 mm | 6.8 | 59 |
| February | 9.0°C | 2.6°C | 45 mm | 6.2 | 76 |
| March | 11.7°C | 4.1°C | 39 mm | 3.0 | 120 |
| April | 15.0°C | 6.0°C | 42 mm | 0.8 | 169 |
| May | 18.4°C | 9.1°C | 46 mm | 0.0 | 197 |
| June | 21.6°C | 12.0°C | 47 mm | 0.0 | 197 |
| July | 23.9°C | 14.2°C | 46 mm | 0.0 | 206 |
| August | 23.4°C | 14.1°C | 54 mm | 0.0 | 192 |
| September | 20.2°C | 11.6°C | 50 mm | 0.0 | 150 |
| October | 15.8°C | 8.8°C | 65 mm | 0.3 | 111 |
| November | 11.5°C | 5.3°C | 67 mm | 2.7 | 68 |
| December | 8.8°C | 3.1°C | 57 mm | 7.2 | 53 |
| Year | 15.6°C | 7.8°C | 616 mm | 27 | 1,597 |
Met Office historic station data, Heathrow (London Airport), 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Westhumble 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 Surrey 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 |
|---|---|---|---|
| Westhumble | 22.7°C | 1.4°C | 804 mm |
| Dorking 1.9 mi | 22.4°C about the same | 1.3°C about the same | 830 mm |
| Box Hill 2.0 mi | 22.7°C about the same | 0.7°C 0.7°C colder | 818 mm |
| Westcott 2.4 mi | 22.4°C about the same | 1.3°C about the same | 830 mm |
| Great Bookham and Fetcham 2.7 mi | 22.7°C about the same | 1.7°C about the same | 753 mm |
| Brockham 2.7 mi | 22.7°C about the same | 1.4°C about the same | 808 mm |
| Leatherhead 3.3 mi | 22.3°C about the same | 1.8°C about the same | 754 mm |
Westhumble 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 | 7.7°C 46°F | 1.4°C 34°F | 4.5°C | 83 mm 3.3 in |
| February | 8.4°C 47°F | 1.3°C 34°F | 4.8°C | 65 mm 2.5 in |
| March | 11.2°C 52°F | 2.7°C 37°F | 6.9°C | 51 mm 2.0 in |
| April | 14.2°C 58°F | 4.1°C 39°F | 9.2°C | 52 mm 2.1 in |
| May | 17.4°C 63°F | 6.8°C 44°F | 12.1°C | 53 mm 2.1 in |
| June | 20.3°C 69°F | 9.6°C 49°F | 15.0°C | 48 mm 1.9 in |
| July | 22.7°C 73°F | 11.8°C 53°F | 17.3°C | 53 mm 2.1 in |
| August | 22.2°C 72°F | 11.7°C 53°F | 17.0°C | 62 mm 2.4 in |
| September | 19.3°C 67°F | 9.4°C 49°F | 14.4°C | 64 mm 2.5 in |
| October | 15.0°C 59°F | 6.8°C 44°F | 10.9°C | 88 mm 3.5 in |
| November | 10.8°C 51°F | 3.7°C 39°F | 7.2°C | 94 mm 3.7 in |
| December | 8.1°C 47°F | 1.7°C 35°F | 4.9°C | 90 mm 3.5 in |
| Year | 14.8°C | 5.9°C | 10.4°C | 804 mm |
Where Westhumble’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 Westhumble’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 Heathrow (London Airport), 16 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 Westhumble’s climate
How warm does Westhumble get in summer?
July is the warmest month, with average highs of 22.7°C (73°F). About 21 days a year reach 25°C (77°F), more than 94% of UK towns.
How cold does Westhumble get in winter?
February nights average 1.3°C (34°F). The air drops below freezing on about 63 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Westhumble get?
About 804 mm (32 in) a year, more than 55% of UK towns. November is the wettest month (94 mm) and June the driest (48 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Heathrow (16 miles away), averages 1,597 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 Westhumble. 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 Westhumble →
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.