Few UK towns have milder winter nights than Harman's Cross
Peak summer warmth arrives in July, with afternoons near 20.6°C (69°F). From frosty January to warm July, readings climb 17°C. Warm afternoons come less often than in 81% of UK towns. From June to September, highs of 19–21°C make it easy to spend the day outdoors.
Met Office 1991–2020 averages for the town itself.
A year in Harman's Cross at a glance
Each month’s typical high and low, in °C.
What a year in Harman's Cross feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 918 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 Hurn (Bournemouth Airport)
20 air frosts and 4 days of 25°C a year
On about 20 nights a year the air drops below freezing; days that stay below freezing are rare. About 4 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 Hurn (Bournemouth Airport)
Hurn (Bournemouth Airport) is 14 miles north-east of Harman's Cross, 10 m (33 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 | 8.8°C | 1.8°C | 96 mm | 11.1 | 65 |
| February | 9.1°C | 1.6°C | 67 mm | 10.9 | 80 |
| March | 11.4°C | 2.8°C | 62 mm | 8.3 | 122 |
| April | 14.2°C | 4.3°C | 58 mm | 4.7 | 178 |
| May | 17.4°C | 7.3°C | 49 mm | 0.6 | 211 |
| June | 20.1°C | 10.2°C | 54 mm | 0.0 | 217 |
| July | 22.3°C | 12.2°C | 50 mm | 0.0 | 221 |
| August | 22.0°C | 12.0°C | 60 mm | 0.0 | 198 |
| September | 19.6°C | 9.6°C | 69 mm | 0.0 | 156 |
| October | 15.6°C | 7.4°C | 101 mm | 2.2 | 108 |
| November | 11.8°C | 4.1°C | 108 mm | 6.9 | 76 |
| December | 9.2°C | 2.0°C | 104 mm | 11.6 | 59 |
| Year | 15.1°C | 6.3°C | 877 mm | 56 | 1,690 |
Met Office historic station data, Hurn, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Harman's Cross 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 |
|---|---|---|---|
| Harman's Cross | 20.6°C | 3.7°C | 918 mm |
| Swanage 2.5 mi | 20.6°C about the same | 4.0°C about the same | 909 mm |
| Wareham 6.5 mi | 22.1°C 1.5°C warmer | 2.5°C 1.2°C colder | 860 mm |
| Sandford 6.7 mi | 22.1°C 1.5°C warmer | 2.5°C 1.2°C colder | 852 mm |
| Upton 7.9 mi | 22.0°C 1.3°C warmer | 2.9°C 0.8°C colder | 875 mm |
| Poole 8.2 mi | 22.0°C 1.4°C warmer | 3.0°C 0.7°C colder | 919 mm |
| Lytchett Matravers 9.7 mi | 22.2°C 1.6°C warmer | 2.0°C 1.7°C colder | 918 mm |
Harman's Cross 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 | 8.6°C 48°F | 3.7°C 39°F | 6.2°C | 101 mm 4.0 in |
| February | 8.6°C 47°F | 3.4°C 38°F | 6.0°C | 73 mm 2.9 in |
| March | 10.5°C 51°F | 4.4°C 40°F | 7.4°C | 63 mm 2.5 in |
| April | 12.9°C 55°F | 5.9°C 43°F | 9.4°C | 57 mm 2.2 in |
| May | 15.9°C 61°F | 8.7°C 48°F | 12.3°C | 51 mm 2.0 in |
| June | 18.5°C 65°F | 11.4°C 53°F | 14.9°C | 59 mm 2.3 in |
| July | 20.6°C 69°F | 13.4°C 56°F | 17.0°C | 53 mm 2.1 in |
| August | 20.6°C 69°F | 13.5°C 56°F | 17.0°C | 62 mm 2.4 in |
| September | 18.6°C 65°F | 11.6°C 53°F | 15.1°C | 69 mm 2.7 in |
| October | 15.2°C 59°F | 9.3°C 49°F | 12.3°C | 107 mm 4.2 in |
| November | 11.7°C 53°F | 6.3°C 43°F | 9.0°C | 113 mm 4.4 in |
| December | 9.3°C 49°F | 4.1°C 39°F | 6.7°C | 112 mm 4.4 in |
| Year | 14.3°C | 8.0°C | 11.1°C | 918 mm |
Where Harman's Cross’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 Harman's Cross’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 Hurn, 14 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 Harman's Cross’s climate
How warm does Harman's Cross get in summer?
July is the warmest month, with average highs of 20.6°C (69°F). About 4 days a year reach 25°C (77°F), fewer than 81% of UK towns.
How cold does Harman's Cross get in winter?
February nights average 3.4°C (38°F). The air drops below freezing on about 20 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Harman's Cross get?
About 918 mm (36 in) a year, more than 71% of UK towns. November is the wettest month (113 mm) and May the driest (51 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Hurn (Bournemouth Airport) (14 miles away), averages 1,690 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 Harman's Cross. 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 Harman's Cross →
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