Wet weather: 1,137 mm (45 in) a year falls on Charlton Down, more than on 87% of UK towns
Peak summer warmth arrives in July, with afternoons near 21.3°C (70°F). Its January nights stay gentler than in 75% of UK towns. Only 19°C separates winter nights from summer afternoons. Gritters and ice scrapers earn their keep on roughly 44 nights a year below 0°C.
Met Office 1991–2020 averages for the town itself.
A year in Charlton Down at a glance
Each month’s typical high and low, in °C.
What a year in Charlton Down feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,137 mm of rain a year
December is the wettest month and July the driest. About 39 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Yeovilton
44 air frosts and 10 days of 25°C a year
On about 44 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 10 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 Yeovilton
Yeovilton is 19 miles north-west of Charlton Down, 20 m (66 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 | 8.6°C | 2.0°C | 70 mm | 10.0 | 58 |
| February | 9.0°C | 1.8°C | 51 mm | 9.7 | 77 |
| March | 11.2°C | 3.0°C | 49 mm | 7.6 | 114 |
| April | 13.9°C | 4.5°C | 52 mm | 3.8 | 163 |
| May | 17.1°C | 7.4°C | 47 mm | 0.5 | 191 |
| June | 19.9°C | 10.3°C | 58 mm | 0.0 | 188 |
| July | 21.9°C | 12.2°C | 50 mm | 0.0 | 192 |
| August | 21.6°C | 12.2°C | 61 mm | 0.0 | 175 |
| September | 19.2°C | 10.0°C | 53 mm | 0.0 | 142 |
| October | 15.3°C | 7.6°C | 81 mm | 1.8 | 104 |
| November | 11.5°C | 4.4°C | 80 mm | 5.5 | 69 |
| December | 9.0°C | 2.3°C | 77 mm | 10.3 | 52 |
| Year | 14.9°C | 6.5°C | 728 mm | 49 | 1,524 |
Met Office historic station data, Yeovilton, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Charlton Down 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 Dorset 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 |
|---|---|---|---|
| Charlton Down | 21.3°C | 2.2°C | 1,137 mm |
| Charminster 1.3 mi | 21.3°C about the same | 2.3°C about the same | 1,131 mm |
| Dorchester 3.0 mi | 21.7°C about the same | 2.4°C about the same | 1,089 mm |
| Puddletown 4.9 mi | 21.6°C about the same | 2.2°C about the same | 1,058 mm |
| Maiden Newton 5.3 mi | 21.1°C about the same | 1.4°C 0.8°C colder | 1,084 mm |
| Crossways 6.8 mi | 21.8°C about the same | 2.5°C about the same | 968 mm |
| Milborne St Andrew 7.9 mi | 21.3°C about the same | 2.1°C about the same | 1,054 mm |
Charlton Down 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 | 8.0°C 46°F | 2.2°C 36°F | 5.0°C | 131 mm 5.2 in |
| February | 8.4°C 47°F | 2.0°C 36°F | 5.1°C | 94 mm 3.7 in |
| March | 10.7°C 51°F | 3.2°C 38°F | 6.9°C | 80 mm 3.2 in |
| April | 13.6°C 56°F | 4.6°C 40°F | 9.0°C | 74 mm 2.9 in |
| May | 16.8°C 62°F | 7.3°C 45°F | 12.0°C | 64 mm 2.5 in |
| June | 19.5°C 67°F | 10.2°C 50°F | 14.7°C | 64 mm 2.5 in |
| July | 21.3°C 70°F | 12.1°C 54°F | 16.7°C | 60 mm 2.4 in |
| August | 21.1°C 70°F | 12.0°C 54°F | 16.5°C | 85 mm 3.3 in |
| September | 18.7°C 66°F | 10.0°C 50°F | 14.3°C | 84 mm 3.3 in |
| October | 14.9°C 59°F | 7.6°C 46°F | 11.2°C | 131 mm 5.2 in |
| November | 11.1°C 52°F | 4.5°C 40°F | 7.7°C | 135 mm 5.3 in |
| December | 8.5°C 47°F | 2.5°C 37°F | 5.5°C | 136 mm 5.4 in |
| Year | 14.4°C | 6.5°C | 10.4°C | 1,137 mm |
Where Charlton Down’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 Charlton Down’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 Yeovilton, 19 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 Charlton Down’s climate
How warm does Charlton Down get in summer?
July is the warmest month, with average highs of 21.3°C (70°F). About 10 days a year reach 25°C (77°F), fewer than 52% of UK towns.
How cold does Charlton Down get in winter?
February nights average 2.0°C (36°F). The air drops below freezing on about 44 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Charlton Down get?
About 1,137 mm (45 in) a year, more than 87% of UK towns. December is the wettest month (136 mm) and July the driest (60 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Yeovilton (19 miles away), averages 1,524 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 Charlton Down. 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 Charlton Down →
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.