Dartmouth sits near the bottom of UK towns for frosts
Expect July afternoons of about 21.3°C (70°F). By warm days alone, it ranks cooler than 91% of UK towns. January is the wettest month, May the driest. Radiators earn their keep from November to April, the months that average under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in Dartmouth at a glance
Each month’s typical high and low, in °C.
What a year in Dartmouth feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,097 mm of rain a year
January is the wettest month and May the driest. About 41 days a year bring 10 mm (0.4 in) or more. 16th wettest of 47 Devon towns of 2,500+.
Rain by month
Millimetres
11 air frosts and 2 days of 25°C a year
On about 11 nights a year the air drops below freezing; days that stay below freezing are rare. About 2 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 Chivenor
Chivenor is 57 miles north-west of Dartmouth, 6 m (20 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 |
|---|---|---|---|---|
| January | 9.1°C | 3.6°C | 91 mm | 5.4 |
| February | 9.4°C | 3.4°C | 70 mm | 5.0 |
| March | 11.2°C | 4.5°C | 60 mm | 2.6 |
| April | 13.7°C | 5.9°C | 56 mm | 0.9 |
| May | 16.5°C | 8.6°C | 55 mm | 0.0 |
| June | 19.0°C | 11.4°C | 68 mm | 0.0 |
| July | 20.7°C | 13.3°C | 74 mm | 0.0 |
| August | 20.5°C | 13.4°C | 77 mm | 0.0 |
| September | 18.8°C | 11.5°C | 70 mm | 0.0 |
| October | 15.4°C | 9.1°C | 107 mm | 0.4 |
| November | 12.1°C | 6.2°C | 106 mm | 1.8 |
| December | 9.9°C | 4.3°C | 107 mm | 4.6 |
| Year | 14.7°C | 7.9°C | 941 mm | 21 |
Met Office historic station data, Chivenor, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Dartmouth 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 Devon 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 |
|---|---|---|---|
| Dartmouth | 21.3°C | 3.9°C | 1,097 mm |
| Stoke Gabriel 4.1 mi | 21.6°C about the same | 3.6°C about the same | 1,110 mm |
| Brixham 4.2 mi | 21.2°C about the same | 4.1°C about the same | 1,105 mm |
| Paignton 6.5 mi | 21.0°C about the same | 3.9°C about the same | 1,090 mm |
| Totnes 7.0 mi | 21.3°C about the same | 3.5°C about the same | 1,154 mm |
| Chillington 7.1 mi | 20.8°C about the same | 4.0°C about the same | 1,179 mm |
| Marldon 7.3 mi | 21.3°C about the same | 3.1°C 0.8°C colder | 1,124 mm |
Dartmouth 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 | 9.5°C 49°F | 3.9°C 39°F | 6.7°C | 141 mm 5.5 in |
| February | 10.1°C 50°F | 4.0°C 39°F | 7.0°C | 93 mm 3.7 in |
| March | 11.4°C 52°F | 4.9°C 41°F | 8.1°C | 80 mm 3.1 in |
| April | 13.8°C 57°F | 5.9°C 43°F | 9.7°C | 69 mm 2.7 in |
| May | 16.4°C 61°F | 8.2°C 47°F | 12.3°C | 59 mm 2.3 in |
| June | 19.1°C 66°F | 10.8°C 51°F | 15.0°C | 66 mm 2.6 in |
| July | 21.3°C 70°F | 12.5°C 55°F | 17.0°C | 63 mm 2.5 in |
| August | 21.2°C 70°F | 12.9°C 55°F | 17.1°C | 78 mm 3.1 in |
| September | 19.3°C 67°F | 11.5°C 53°F | 15.4°C | 71 mm 2.8 in |
| October | 16.0°C 61°F | 9.5°C 49°F | 12.8°C | 120 mm 4.7 in |
| November | 12.9°C 55°F | 6.9°C 44°F | 9.9°C | 127 mm 5.0 in |
| December | 10.6°C 51°F | 4.8°C 41°F | 7.7°C | 132 mm 5.2 in |
| Year | 15.1°C | 8.0°C | 11.5°C | 1,097 mm |
Where Dartmouth’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 Dartmouth’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 Chivenor, 57 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 Dartmouth’s climate
How warm does Dartmouth get in summer?
July is the warmest month, with average highs of 21.3°C (70°F). About 2 days a year reach 25°C (77°F), fewer than 91% of UK towns.
How cold does Dartmouth get in winter?
January nights average 3.9°C (39°F). The air drops below freezing on about 11 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Dartmouth get?
About 1,097 mm (43 in) a year, more than 84% of UK towns. January is the wettest month (141 mm) and May the driest (59 mm).
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 Dartmouth. 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 Dartmouth →
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