Ice on the ground: Dummer sees more frosts than 87% of UK towns
Midsummer highs settle at about 21.7°C (71°F). It is a wet place: more rain falls here than on 75% of UK towns. Expect the heaviest rain in November and the lightest in May. The outdoor season runs from June to September, with highs of 18–22°C.
Met Office 1991–2020 averages for the town itself.
A year in Dummer at a glance
Each month’s typical high and low, in °C.
What a year in Dummer feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 948 mm of rain a year
November is the wettest month and May the driest. About 29 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: 51 air frosts and 13 days of 25°C a year
On about 51 nights a year the air drops below freezing, and on about 2 days it stays below freezing all day. About 13 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 36 miles north-east of Dummer, 25 m (82 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 | 8.4°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 Dummer 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 Hampshire 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 |
|---|---|---|---|
| Dummer | 21.7°C | 1.4°C | 948 mm |
| Oakley 2.8 mi | 22.2°C 0.6°C warmer | 1.6°C about the same | 834 mm |
| Basingstoke 4.8 mi | 22.3°C 0.7°C warmer | 1.8°C about the same | 805 mm |
| Overton 4.9 mi | 22.1°C about the same | 1.6°C about the same | 811 mm |
| Old Basing 6.7 mi | 22.7°C 1.0°C warmer | 1.9°C 0.5°C milder | 736 mm |
| Whitchurch 7.7 mi | 22.2°C 0.6°C warmer | 1.7°C about the same | 823 mm |
| Four Marks 8.4 mi | 21.8°C about the same | 1.1°C about the same | 931 mm |
Dummer 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 | 1.4°C 35°F | 4.4°C | 98 mm 3.9 in |
| February | 7.6°C 46°F | 1.1°C 34°F | 4.4°C | 75 mm 2.9 in |
| March | 10.2°C 50°F | 2.4°C 36°F | 6.3°C | 64 mm 2.5 in |
| April | 13.3°C 56°F | 3.9°C 39°F | 8.6°C | 66 mm 2.6 in |
| May | 16.6°C 62°F | 6.8°C 44°F | 11.7°C | 58 mm 2.3 in |
| June | 19.4°C 67°F | 9.6°C 49°F | 14.5°C | 62 mm 2.4 in |
| July | 21.7°C 71°F | 11.6°C 53°F | 16.7°C | 63 mm 2.5 in |
| August | 21.3°C 70°F | 11.6°C 53°F | 16.5°C | 74 mm 2.9 in |
| September | 18.5°C 65°F | 9.4°C 49°F | 14.0°C | 70 mm 2.8 in |
| October | 14.3°C 58°F | 7.0°C 45°F | 10.7°C | 104 mm 4.1 in |
| November | 10.2°C 50°F | 3.9°C 39°F | 7.1°C | 111 mm 4.4 in |
| December | 7.6°C 46°F | 1.7°C 35°F | 4.6°C | 103 mm 4.1 in |
| Year | 14.0°C | 5.9°C | 9.9°C | 948 mm |
Where Dummer’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 Dummer’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 Heathrow (London Airport), 36 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 Dummer’s climate
How warm does Dummer get in summer?
July is the warmest month, with average highs of 21.7°C (71°F). About 13 days a year reach 25°C (77°F), more than 64% of UK towns.
How cold does Dummer get in winter?
February nights average 1.1°C (34°F). The air drops below freezing on about 51 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Dummer get?
About 948 mm (37 in) a year, more than 75% of UK towns. November is the wettest month (111 mm) and May the driest (58 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Heathrow (36 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 Dummer. 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 Dummer →
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.