Midwinter lows in Barnham stay above those of 83% of UK towns
In July the day’s top temperature is typically 22.5°C (72°F). Summer afternoons here are warmer than in 78% of UK towns. The rainiest month is November; the driest is May. Long walks are most pleasant from June to September, when afternoons reach 20–22°C.
Met Office 1991–2020 averages for the town itself.
A year in Barnham at a glance
Each month’s typical high and low, in °C.
What a year in Barnham 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 May the driest. About 24 days a year bring 10 mm (0.4 in) or more. 31st wettest of 40 West Sussex towns of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Eastbourne
34 air frosts and 11 days of 25°C a year
On about 34 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 Eastbourne
Eastbourne is 41 miles east of Barnham, 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 Barnham 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 |
|---|---|---|---|
| Barnham | 22.5°C | 2.4°C | 804 mm |
| Walberton 1.1 mi | 22.3°C about the same | 2.2°C about the same | 871 mm |
| Yapton 2.7 mi | 22.3°C about the same | 2.6°C about the same | 777 mm |
| Tangmere 3.1 mi | 21.8°C 0.6°C cooler | 2.4°C about the same | 827 mm |
| Bognor Regis 3.7 mi | 21.8°C 0.7°C cooler | 3.0°C 0.6°C milder | 765 mm |
| Arundel 3.8 mi | 22.2°C about the same | 2.3°C about the same | 813 mm |
| Westhampnett 4.4 mi | 21.8°C 0.6°C cooler | 2.4°C about the same | 826 mm |
Barnham 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 | 8.5°C 47°F | 2.4°C 36°F | 5.5°C | 87 mm 3.4 in |
| February | 8.9°C 48°F | 2.2°C 36°F | 5.5°C | 62 mm 2.4 in |
| March | 11.3°C 52°F | 3.4°C 38°F | 7.4°C | 49 mm 1.9 in |
| April | 14.5°C 58°F | 4.7°C 41°F | 9.6°C | 49 mm 1.9 in |
| May | 17.7°C 64°F | 7.6°C 46°F | 12.6°C | 48 mm 1.9 in |
| June | 20.5°C 69°F | 10.4°C 51°F | 15.4°C | 52 mm 2.0 in |
| July | 22.5°C 72°F | 12.3°C 54°F | 17.4°C | 50 mm 2.0 in |
| August | 22.5°C 72°F | 12.3°C 54°F | 17.4°C | 62 mm 2.4 in |
| September | 19.9°C 68°F | 10.1°C 50°F | 15.0°C | 62 mm 2.5 in |
| October | 16.1°C 61°F | 8.0°C 46°F | 12.1°C | 93 mm 3.7 in |
| November | 11.9°C 53°F | 4.9°C 41°F | 8.4°C | 95 mm 3.7 in |
| December | 9.2°C 49°F | 2.9°C 37°F | 6.0°C | 95 mm 3.7 in |
| Year | 15.3°C | 6.8°C | 11.0°C | 804 mm |
Where Barnham’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 1 Met Office 2 km grid square whose centre lies inside Barnham’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, 41 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 Barnham’s climate
How warm does Barnham get in summer?
July is the warmest month, with average highs of 22.5°C (72°F). About 11 days a year reach 25°C (77°F), more than 52% of UK towns.
How cold does Barnham get in winter?
February nights average 2.2°C (36°F). The air drops below freezing on about 34 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Barnham get?
About 804 mm (32 in) a year, more than 55% of UK towns. November is the wettest month (95 mm) and May the driest (48 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Eastbourne (41 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 Barnham. 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 Barnham →
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