St Erme and Trispen sits near the top of UK towns for mild winters
The warmest part of a July day comes in at 19.9°C (68°F) on average. Rain is plentiful here, more than falls on 85% of UK towns. Seasons differ by 16°C, from the coldest nights to the warmest afternoons. Keep the boiler serviced for the months from November to April, which average under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in St Erme and Trispen at a glance
Each month’s typical high and low, in °C.
What a year in St Erme and Trispen feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,117 mm of rain a year
November is the wettest month and June the driest. About 36 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Camborne
22 air frosts and 3 days of 25°C a year
On about 22 nights a year the air drops below freezing; days that stay below freezing are rare. About 3 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 Camborne
Camborne is 15 miles south-west of St Erme and Trispen, 87 m (285 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 | 9.2°C | 4.9°C | 121 mm | 2.2 | 60 |
| February | 9.1°C | 4.6°C | 95 mm | 2.1 | 82 |
| March | 10.2°C | 5.4°C | 72 mm | 1.1 | 121 |
| April | 12.1°C | 6.6°C | 73 mm | 0.0 | 181 |
| May | 14.5°C | 8.8°C | 61 mm | 0.0 | 208 |
| June | 16.9°C | 11.2°C | 63 mm | 0.0 | 205 |
| July | 18.7°C | 13.2°C | 69 mm | 0.0 | 190 |
| August | 19.0°C | 13.4°C | 79 mm | 0.0 | 180 |
| September | 17.5°C | 12.0°C | 78 mm | 0.0 | 154 |
| October | 14.6°C | 10.0°C | 111 mm | 0.0 | 108 |
| November | 11.8°C | 7.4°C | 130 mm | 0.2 | 68 |
| December | 9.9°C | 5.6°C | 126 mm | 1.7 | 54 |
| Year | 13.6°C | 8.6°C | 1,076 mm | 7 | 1,611 |
Met Office historic station data, Camborne, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How St Erme and Trispen 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 Cornwall 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 |
|---|---|---|---|
| St Erme and Trispen | 19.9°C | 3.5°C | 1,117 mm |
| Shortlanesend 2.7 mi | 19.9°C about the same | 3.6°C about the same | 1,093 mm |
| Truro 3.6 mi | 20.0°C about the same | 3.7°C about the same | 1,144 mm |
| Probus 3.8 mi | 19.7°C about the same | 3.5°C about the same | 1,133 mm |
| St Newlyn East 3.9 mi | 20.5°C 0.6°C warmer | 3.8°C about the same | 1,062 mm |
| Grampound Road 4.4 mi | 19.9°C about the same | 3.5°C about the same | 1,209 mm |
| Threemilestone 5.1 mi | 19.5°C about the same | 3.9°C about the same | 1,192 mm |
St Erme and Trispen 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 | 9.1°C 48°F | 3.5°C 38°F | 6.2°C | 129 mm 5.1 in |
| February | 9.3°C 49°F | 3.4°C 38°F | 6.3°C | 98 mm 3.9 in |
| March | 10.8°C 51°F | 4.4°C 40°F | 7.7°C | 77 mm 3.0 in |
| April | 12.9°C 55°F | 5.0°C 41°F | 9.1°C | 70 mm 2.8 in |
| May | 15.5°C 60°F | 7.4°C 45°F | 11.3°C | 63 mm 2.5 in |
| June | 18.1°C 65°F | 10.2°C 50°F | 14.1°C | 63 mm 2.5 in |
| July | 19.9°C 68°F | 12.1°C 54°F | 15.9°C | 70 mm 2.8 in |
| August | 19.9°C 68°F | 12.3°C 54°F | 16.2°C | 80 mm 3.2 in |
| September | 17.9°C 64°F | 10.4°C 51°F | 14.1°C | 77 mm 3.0 in |
| October | 14.9°C 59°F | 8.2°C 47°F | 11.5°C | 121 mm 4.7 in |
| November | 11.7°C 53°F | 5.6°C 42°F | 8.7°C | 138 mm 5.4 in |
| December | 9.7°C 50°F | 3.9°C 39°F | 6.8°C | 131 mm 5.2 in |
| Year | 14.1°C | 7.2°C | 10.7°C | 1,117 mm |
Where St Erme and Trispen’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 St Erme and Trispen’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 Camborne, 15 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 St Erme and Trispen’s climate
How warm does St Erme and Trispen get in summer?
July is the warmest month, with average highs of 19.9°C (68°F). About 3 days a year reach 25°C (77°F), fewer than 84% of UK towns.
How cold does St Erme and Trispen get in winter?
February nights average 3.4°C (38°F). The air drops below freezing on about 22 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does St Erme and Trispen get?
About 1,117 mm (44 in) a year, more than 85% of UK towns. November is the wettest month (138 mm) and June the driest (63 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Camborne (15 miles away), averages 1,611 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 St Erme and Trispen. 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 St Erme and Trispen →
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