July in Silloth stays fresher than in 87% of UK towns
January mornings start at about 2.3°C (36°F). Only 17°C separates winter nights from summer afternoons. Frosty nights are scarcer than in 85% of UK towns. 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 Silloth at a glance
Each month’s typical high and low, in °C.
What a year in Silloth feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 948 mm of rain a year
October is the wettest month and April the driest. About 26 days a year bring 10 mm (0.4 in) or more. 20th wettest of 23 Cumbria towns of 2,500+.
Rain by month
Millimetres
30 air frosts and 1 days of 25°C a year
On about 30 nights a year the air drops below freezing; days that stay below freezing are rare. About 1 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 Newton Rigg
Newton Rigg is 28 miles south-east of Silloth, 169 m (554 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 | 6.4°C | 0.9°C | 103 mm | 11.1 |
| February | 7.0°C | 0.9°C | 81 mm | 10.6 |
| March | 9.1°C | 1.9°C | 69 mm | 8.6 |
| April | 12.0°C | 3.3°C | 52 mm | 4.8 |
| May | 15.3°C | 5.7°C | 56 mm | 1.8 |
| June | 17.6°C | 8.7°C | 67 mm | 0.0 |
| July | 19.5°C | 10.6°C | 75 mm | 0.0 |
| August | 18.9°C | 10.3°C | 81 mm | 0.0 |
| September | 16.6°C | 8.2°C | 76 mm | 0.1 |
| October | 12.8°C | 5.7°C | 102 mm | 2.9 |
| November | 9.1°C | 2.9°C | 103 mm | 7.1 |
| December | 6.8°C | 0.7°C | 118 mm | 12.0 |
| Year | 12.6°C | 5.0°C | 981 mm | 59 |
Met Office historic station data, Newton Rigg, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Silloth 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 Cumbria 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 |
|---|---|---|---|
| Silloth | 19.3°C | 2.3°C | 948 mm |
| Aspatria 7.6 mi | 19.5°C about the same | 1.3°C 0.9°C colder | 1,079 mm |
| Wigton 9.4 mi | 19.5°C about the same | 1.4°C 0.8°C colder | 1,019 mm |
| Annan 9.8 mi | 19.6°C about the same | 1.6°C 0.7°C colder | 1,036 mm |
| Dearham 11.5 mi | 18.8°C about the same | 1.9°C about the same | 1,040 mm |
| Maryport 11.7 mi | 18.8°C about the same | 2.1°C about the same | 1,045 mm |
Silloth 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 | 7.9°C 46°F | 2.3°C 36°F | 5.1°C | 89 mm 3.5 in |
| February | 8.3°C 47°F | 2.0°C 36°F | 5.2°C | 72 mm 2.8 in |
| March | 9.8°C 50°F | 2.9°C 37°F | 6.4°C | 65 mm 2.5 in |
| April | 12.4°C 54°F | 4.3°C 40°F | 8.4°C | 51 mm 2.0 in |
| May | 15.2°C 59°F | 6.7°C 44°F | 11.0°C | 57 mm 2.2 in |
| June | 17.5°C 64°F | 9.5°C 49°F | 13.6°C | 71 mm 2.8 in |
| July | 19.3°C 67°F | 11.4°C 53°F | 15.4°C | 80 mm 3.1 in |
| August | 19.0°C 66°F | 11.3°C 52°F | 15.2°C | 89 mm 3.5 in |
| September | 17.1°C 63°F | 9.8°C 50°F | 13.4°C | 81 mm 3.2 in |
| October | 14.0°C 57°F | 7.2°C 45°F | 10.6°C | 106 mm 4.2 in |
| November | 10.5°C 51°F | 4.6°C 40°F | 7.6°C | 94 mm 3.7 in |
| December | 8.2°C 47°F | 2.3°C 36°F | 5.3°C | 95 mm 3.7 in |
| Year | 13.3°C | 6.2°C | 9.8°C | 948 mm |
Where Silloth’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 2 Met Office 2 km grid squares whose centre lies inside Silloth’s built-up area.
- 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 Newton Rigg, 28 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 Silloth’s climate
How warm does Silloth get in summer?
July is the warmest month, with average highs of 19.3°C (67°F). About 1 days a year reach 25°C (77°F), fewer than 96% of UK towns.
How cold does Silloth get in winter?
February nights average 2.0°C (36°F). The air drops below freezing on about 30 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Silloth get?
About 948 mm (37 in) a year, more than 75% of UK towns. October is the wettest month (106 mm) and April the driest (51 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 Silloth. 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 Silloth →
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.