Warm afternoons come to East Grinstead more often than to 86% of UK towns
January nights here settle around 1.7°C (35°F). Wet weather is most frequent in November and least in July. By frosts alone, it ranks colder than 66% of UK towns. Garden chairs stay out from June to September, the months with highs of 20–23°C.
Met Office 1991–2020 averages for the town itself.
A year in East Grinstead at a glance
Each month’s typical high and low, in °C.
What a year in East Grinstead feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 836 mm of rain a year
November is the wettest month and July the driest. About 25 days a year bring 10 mm (0.4 in) or more. 20th wettest of 40 West Sussex towns of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Eastbourne
45 air frosts and 19 days of 25°C a year
On about 45 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 19 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 Eastbourne
Eastbourne is 29 miles south-east of East Grinstead, 7 m (23 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 | 8.5°C | 3.9°C | 83 mm | 4.5 | 70 |
| February | 8.6°C | 3.6°C | 58 mm | 3.8 | 90 |
| March | 10.5°C | 4.9°C | 48 mm | 1.1 | 134 |
| April | 13.3°C | 6.7°C | 45 mm | 0.2 | 203 |
| May | 16.3°C | 9.6°C | 46 mm | 0.0 | 236 |
| June | 18.9°C | 12.5°C | 47 mm | 0.0 | 239 |
| July | 21.0°C | 14.7°C | 54 mm | 0.0 | 252 |
| August | 21.3°C | 14.9°C | 60 mm | 0.0 | 233 |
| September | 19.2°C | 12.6°C | 60 mm | 0.0 | 172 |
| October | 15.7°C | 9.9°C | 93 mm | 0.0 | 121 |
| November | 11.9°C | 6.9°C | 98 mm | 0.6 | 78 |
| December | 9.3°C | 4.5°C | 100 mm | 3.8 | 62 |
| Year | 14.5°C | 8.7°C | 792 mm | 14 | 1,889 |
Met Office historic station data, Eastbourne, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How East Grinstead 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 West Sussex 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 |
|---|---|---|---|
| East Grinstead | 22.5°C | 1.7°C | 836 mm |
| Felbridge 1.8 mi | 22.3°C about the same | 1.8°C about the same | 861 mm |
| Ashurst Wood 2.0 mi | 22.4°C about the same | 1.8°C about the same | 886 mm |
| Dormansland 2.4 mi | 22.0°C 0.5°C cooler | 1.6°C about the same | 856 mm |
| Crawley Down 2.8 mi | 22.3°C about the same | 1.6°C about the same | 869 mm |
| Forest Row 3.2 mi | 21.7°C 0.8°C cooler | 1.7°C about the same | 959 mm |
| Lingfield 3.2 mi | 22.7°C about the same | 1.8°C about the same | 773 mm |
East Grinstead 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 | 1.7°C 35°F | 4.7°C | 94 mm 3.7 in |
| February | 8.1°C 47°F | 1.4°C 35°F | 4.8°C | 64 mm 2.5 in |
| March | 11.0°C 52°F | 3.0°C 37°F | 7.0°C | 52 mm 2.0 in |
| April | 14.3°C 58°F | 4.8°C 41°F | 9.6°C | 58 mm 2.3 in |
| May | 17.3°C 63°F | 7.3°C 45°F | 12.4°C | 53 mm 2.1 in |
| June | 20.3°C 68°F | 10.0°C 50°F | 15.2°C | 54 mm 2.1 in |
| July | 22.5°C 73°F | 12.4°C 54°F | 17.5°C | 51 mm 2.0 in |
| August | 22.5°C 73°F | 12.6°C 55°F | 17.6°C | 63 mm 2.5 in |
| September | 19.5°C 67°F | 9.8°C 50°F | 14.7°C | 60 mm 2.4 in |
| October | 15.0°C 59°F | 7.6°C 46°F | 11.3°C | 95 mm 3.7 in |
| November | 10.8°C 51°F | 4.4°C 40°F | 7.6°C | 96 mm 3.8 in |
| December | 8.2°C 47°F | 2.2°C 36°F | 5.2°C | 96 mm 3.8 in |
| Year | 14.8°C | 6.4°C | 10.6°C | 836 mm |
Where East Grinstead’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 2 Met Office 2 km grid squares whose centre lies inside East Grinstead’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 Eastbourne, 29 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 East Grinstead’s climate
How warm does East Grinstead get in summer?
July is the warmest month, with average highs of 22.5°C (73°F). About 19 days a year reach 25°C (77°F), more than 86% of UK towns.
How cold does East Grinstead get in winter?
February nights average 1.4°C (35°F). The air drops below freezing on about 45 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does East Grinstead get?
About 836 mm (33 in) a year, more than 60% of UK towns. November is the wettest month (96 mm) and July the driest (51 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Eastbourne (29 miles away), averages 1,889 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 East Grinstead. 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 East Grinstead →
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