Trefonen is wetter than 79% of UK towns: 1,029 mm (41 in) of rain a year
In January the night’s low is typically 1.4°C (34°F). Winter nights are cold: in January they are colder than in 79% of UK towns. A year here swings 19°C from midwinter lows to midsummer highs. Plan time outside from June to September, when highs sit at 17–20°C.
Met Office 1991–2020 averages for the town itself.
A year in Trefonen at a glance
Each month’s typical high and low, in °C.
What a year in Trefonen feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,029 mm of rain a year
December 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 Shawbury
45 air frosts and 6 days of 25°C a year
On about 45 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 6 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 Shawbury
Shawbury is 19 miles east of Trefonen, 72 m (236 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 | 7.5°C | 1.2°C | 57 mm | 11.7 | 50 |
| February | 8.1°C | 1.2°C | 43 mm | 10.8 | 71 |
| March | 10.3°C | 2.3°C | 43 mm | 8.2 | 109 |
| April | 13.2°C | 3.9°C | 47 mm | 4.4 | 148 |
| May | 16.3°C | 6.7°C | 54 mm | 0.9 | 181 |
| June | 19.1°C | 9.6°C | 59 mm | 0.0 | 173 |
| July | 21.1°C | 11.5°C | 58 mm | 0.0 | 179 |
| August | 20.7°C | 11.4°C | 64 mm | 0.0 | 156 |
| September | 18.1°C | 9.3°C | 61 mm | 0.0 | 127 |
| October | 14.2°C | 6.6°C | 69 mm | 1.8 | 92 |
| November | 10.3°C | 3.5°C | 61 mm | 6.7 | 59 |
| December | 7.7°C | 1.3°C | 66 mm | 11.2 | 48 |
| Year | 13.9°C | 5.7°C | 682 mm | 56 | 1,392 |
Met Office historic station data, Shawbury, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Trefonen 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 Shropshire 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 |
|---|---|---|---|
| Trefonen | 20.0°C | 1.4°C | 1,029 mm |
| Morda 2.0 mi | 20.8°C 0.8°C warmer | 1.9°C 0.6°C milder | 886 mm |
| Oswestry 2.9 mi | 20.8°C 0.8°C warmer | 1.8°C about the same | 896 mm |
| Pant 2.9 mi | 20.9°C 0.9°C warmer | 1.7°C about the same | 892 mm |
| Llanymynech 3.7 mi | 21.3°C 1.3°C warmer | 2.0°C 0.6°C milder | 732 mm |
| Whittington 4.9 mi | 21.0°C 0.9°C warmer | 2.0°C 0.7°C milder | 819 mm |
| Gobowen 5.2 mi | 20.8°C 0.8°C warmer | 1.9°C 0.6°C milder | 918 mm |
Trefonen 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 | 7.1°C 45°F | 1.4°C 34°F | 4.2°C | 101 mm 4.0 in |
| February | 7.5°C 45°F | 1.2°C 34°F | 4.4°C | 76 mm 3.0 in |
| March | 9.6°C 49°F | 2.3°C 36°F | 6.0°C | 74 mm 2.9 in |
| April | 12.6°C 55°F | 4.1°C 39°F | 8.3°C | 69 mm 2.7 in |
| May | 15.7°C 60°F | 6.7°C 44°F | 11.2°C | 65 mm 2.5 in |
| June | 18.3°C 65°F | 9.6°C 49°F | 13.9°C | 84 mm 3.3 in |
| July | 20.0°C 68°F | 11.4°C 53°F | 15.7°C | 77 mm 3.0 in |
| August | 19.9°C 68°F | 11.4°C 53°F | 15.6°C | 78 mm 3.1 in |
| September | 17.2°C 63°F | 9.3°C 49°F | 13.2°C | 81 mm 3.2 in |
| October | 13.3°C 56°F | 6.7°C 44°F | 10.0°C | 104 mm 4.1 in |
| November | 9.9°C 50°F | 4.0°C 39°F | 6.9°C | 102 mm 4.0 in |
| December | 7.5°C 45°F | 1.6°C 35°F | 4.6°C | 120 mm 4.7 in |
| Year | 13.2°C | 5.8°C | 9.5°C | 1,029 mm |
Where Trefonen’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 Trefonen’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 Shawbury, 19 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 Trefonen’s climate
How warm does Trefonen get in summer?
July is the warmest month, with average highs of 20.0°C (68°F). About 6 days a year reach 25°C (77°F), fewer than 72% of UK towns.
How cold does Trefonen get in winter?
February nights average 1.2°C (34°F). The air drops below freezing on about 45 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Trefonen get?
About 1,029 mm (41 in) a year, more than 79% of UK towns. December is the wettest month (120 mm) and May the driest (65 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Shawbury (19 miles away), averages 1,392 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 Trefonen. 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 Trefonen →
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