Photo: mym · CC BY-SA 2.0Few UK towns get less rain than Harlton: 577 mm (23 in) a year
Sunny July days climb to about 22.9°C (73°F). The gap between a January night and a July afternoon is 21°C. By warm days alone, it ranks hotter than 94% of UK towns. From June to September, highs of 19–23°C make it easy to spend the day outdoors.
Met Office 1991–2020 averages for the town itself.
A year in Harlton at a glance
Each month’s typical high and low, in °C.
What a year in Harlton feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 577 mm of rain a year
August is the wettest month and March the driest. About 12 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
47 air frosts and 21 days of 25°C a year
On about 47 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 21 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 Cambridge NIAB
Cambridge NIAB is 7.1 miles north-east of Harlton, 26 m (85 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 |
|---|---|---|---|---|
| January | 7.7°C | 1.9°C | 49 mm | 9.0 |
| February | 8.3°C | 1.8°C | 36 mm | 8.7 |
| March | 11.0°C | 3.1°C | 33 mm | 5.2 |
| April | 14.1°C | 4.7°C | 38 mm | 2.6 |
| May | 17.4°C | 7.4°C | 43 mm | 0.6 |
| June | 20.4°C | 10.5°C | 49 mm | 0.0 |
| July | 23.1°C | 12.6°C | 48 mm | 0.0 |
| August | 22.9°C | 12.6°C | 56 mm | 0.0 |
| September | 19.6°C | 10.5°C | 51 mm | 0.0 |
| October | 15.1°C | 7.9°C | 59 mm | 0.7 |
| November | 10.7°C | 4.5°C | 53 mm | 3.7 |
| December | 8.0°C | 2.2°C | 50 mm | 9.2 |
| Year | 14.9°C | 6.6°C | 563 mm | 40 |
Met Office historic station data, Cambridge NIAB, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Harlton 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 Cambridgeshire 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 |
|---|---|---|---|
| Harlton | 22.9°C | 1.6°C | 577 mm |
| Haslingfield 1.1 mi | 23.0°C about the same | 1.6°C about the same | 576 mm |
| Barrington 1.7 mi | 22.9°C about the same | 1.6°C about the same | 574 mm |
| Orwell 2.2 mi | 23.0°C about the same | 1.6°C about the same | 555 mm |
| Comberton 2.4 mi | 23.0°C about the same | 1.6°C about the same | 577 mm |
| Harston 2.5 mi | 23.1°C about the same | 1.6°C about the same | 551 mm |
| Foxton 3.0 mi | 23.2°C about the same | 1.7°C about the same | 540 mm |
Harlton 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 | 7.5°C 45°F | 1.6°C 35°F | 4.6°C | 50 mm 2.0 in |
| February | 8.2°C 47°F | 1.5°C 35°F | 4.9°C | 38 mm 1.5 in |
| March | 10.9°C 52°F | 2.8°C 37°F | 6.9°C | 34 mm 1.3 in |
| April | 14.1°C 57°F | 4.4°C 40°F | 9.2°C | 38 mm 1.5 in |
| May | 17.4°C 63°F | 7.1°C 45°F | 12.2°C | 44 mm 1.7 in |
| June | 20.3°C 69°F | 10.2°C 50°F | 15.2°C | 49 mm 1.9 in |
| July | 22.9°C 73°F | 12.2°C 54°F | 17.5°C | 51 mm 2.0 in |
| August | 22.6°C 73°F | 12.2°C 54°F | 17.4°C | 59 mm 2.3 in |
| September | 19.4°C 67°F | 10.2°C 50°F | 14.8°C | 50 mm 1.9 in |
| October | 15.0°C 59°F | 7.6°C 46°F | 11.3°C | 59 mm 2.3 in |
| November | 10.5°C 51°F | 4.2°C 40°F | 7.4°C | 55 mm 2.2 in |
| December | 7.8°C 46°F | 1.9°C 35°F | 4.9°C | 51 mm 2.0 in |
| Year | 14.7°C | 6.3°C | 10.5°C | 577 mm |
Where Harlton’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 Harlton’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 Cambridge NIAB, 7.1 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 Harlton’s climate
How warm does Harlton get in summer?
July is the warmest month, with average highs of 22.9°C (73°F). About 21 days a year reach 25°C (77°F), more than 94% of UK towns.
How cold does Harlton get in winter?
February nights average 1.5°C (35°F). The air drops below freezing on about 47 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Harlton get?
About 577 mm (23 in) a year, less than 97% of UK towns. August is the wettest month (59 mm) and March the driest (34 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 Harlton. 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 Harlton →
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.