Hardly any UK towns wake to more frost than Harmby
High summer brings afternoon highs near 19.8°C (68°F). Rain peaks in December and eases off in May. Summers stay cool: July afternoons here are cooler than in 79% of UK towns. From June to August, highs of 18–20°C make it easy to spend the day outdoors.
Met Office 1991–2020 averages for the town itself.
A year in Harmby at a glance
Each month’s typical high and low, in °C.
What a year in Harmby feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 846 mm of rain a year
December is the wettest month and May the driest. About 23 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
A frosty town: 57 air frosts and 5 days of 25°C a year
On about 57 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 5 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 Durham
Durham is 33 miles north of Harmby, 102 m (335 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 | 6.9°C | 1.3°C | 53 mm | 10.3 |
| February | 7.8°C | 1.4°C | 46 mm | 9.8 |
| March | 9.9°C | 2.5°C | 41 mm | 6.5 |
| April | 12.5°C | 4.1°C | 51 mm | 3.2 |
| May | 15.4°C | 6.5°C | 45 mm | 0.8 |
| June | 18.0°C | 9.3°C | 61 mm | 0.0 |
| July | 20.2°C | 11.3°C | 61 mm | 0.0 |
| August | 19.9°C | 11.3°C | 67 mm | 0.0 |
| September | 17.4°C | 9.2°C | 57 mm | 0.0 |
| October | 13.5°C | 6.5°C | 63 mm | 1.2 |
| November | 9.7°C | 3.6°C | 76 mm | 4.6 |
| December | 7.1°C | 1.4°C | 61 mm | 10.4 |
| Year | 13.2°C | 5.7°C | 681 mm | 47 |
Met Office historic station data, Durham, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Harmby 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 North Yorkshire 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 |
|---|---|---|---|
| Harmby | 19.8°C | 0.9°C | 846 mm |
| Leyburn 1.0 mi | 19.8°C about the same | 0.9°C about the same | 878 mm |
| Catterick Garrison 6.2 mi | 20.0°C about the same | 0.8°C about the same | 787 mm |
| Richmond 7.9 mi | 19.1°C 0.7°C cooler | 0.6°C about the same | 901 mm |
| Masham 8.1 mi | 20.4°C 0.6°C warmer | 0.9°C about the same | 788 mm |
| Brompton-on-Swale 8.5 mi | 20.6°C 0.9°C warmer | 1.1°C about the same | 697 mm |
| Catterick 8.6 mi | 20.6°C 0.9°C warmer | 1.1°C about the same | 695 mm |
Harmby 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 | 6.2°C 43°F | 0.9°C 34°F | 3.6°C | 81 mm 3.2 in |
| February | 6.8°C 44°F | 0.8°C 33°F | 3.8°C | 72 mm 2.8 in |
| March | 9.0°C 48°F | 1.9°C 35°F | 5.5°C | 58 mm 2.3 in |
| April | 11.8°C 53°F | 3.4°C 38°F | 7.7°C | 57 mm 2.2 in |
| May | 15.0°C 59°F | 5.9°C 43°F | 10.4°C | 52 mm 2.0 in |
| June | 17.6°C 64°F | 8.8°C 48°F | 13.3°C | 67 mm 2.6 in |
| July | 19.8°C 68°F | 10.8°C 51°F | 15.5°C | 62 mm 2.4 in |
| August | 19.3°C 67°F | 10.8°C 51°F | 15.1°C | 75 mm 2.9 in |
| September | 16.6°C 62°F | 8.7°C 48°F | 12.7°C | 70 mm 2.8 in |
| October | 12.8°C 55°F | 6.0°C 43°F | 9.4°C | 80 mm 3.2 in |
| November | 8.9°C 48°F | 3.2°C 38°F | 6.0°C | 86 mm 3.4 in |
| December | 6.5°C 44°F | 0.9°C 34°F | 3.7°C | 88 mm 3.5 in |
| Year | 12.5°C | 5.2°C | 8.9°C | 846 mm |
Where Harmby’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 Harmby’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 Durham, 33 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 Harmby’s climate
How warm does Harmby get in summer?
July is the warmest month, with average highs of 19.8°C (68°F). About 5 days a year reach 25°C (77°F), fewer than 75% of UK towns.
How cold does Harmby get in winter?
February nights average 0.8°C (33°F). The air drops below freezing on about 57 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Harmby get?
About 846 mm (33 in) a year, more than 62% of UK towns. December is the wettest month (88 mm) and May the driest (52 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 Harmby. 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 Harmby →
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.