Frosty mornings in Builth Wells outnumber those of 90% of UK towns
A warm July spell here typically peaks at 20.5°C (69°F). It is a wet place: more rain falls here than on 86% of UK towns. A year here swings 19°C from midwinter lows to midsummer highs. 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 Builth Wells at a glance
Each month’s typical high and low, in °C.
What a year in Builth Wells feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,121 mm of rain a year
December is the wettest month and June the driest. About 36 days a year bring 10 mm (0.4 in) or more. 3rd wettest of 7 Powys towns of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Ross-on-Wye
A frosty town: 52 air frosts and 7 days of 25°C a year
On about 52 nights a year the air drops below freezing, and on about 2 days it stays below freezing all day. About 7 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 Ross-on-Wye
Ross-on-Wye is 39 miles south-east of Builth Wells, 67 m (220 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 | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.0°C | 2.2°C | 76 mm | 9.0 | 55 |
| February | 8.7°C | 2.1°C | 55 mm | 8.4 | 77 |
| March | 11.2°C | 3.3°C | 53 mm | 4.9 | 118 |
| April | 14.2°C | 5.0°C | 55 mm | 2.0 | 165 |
| May | 17.4°C | 7.8°C | 57 mm | 0.1 | 202 |
| June | 20.3°C | 10.7°C | 56 mm | 0.0 | 201 |
| July | 22.3°C | 12.6°C | 52 mm | 0.0 | 209 |
| August | 21.7°C | 12.5°C | 64 mm | 0.0 | 188 |
| September | 19.1°C | 10.3°C | 57 mm | 0.0 | 143 |
| October | 14.8°C | 7.7°C | 85 mm | 1.2 | 104 |
| November | 10.9°C | 4.6°C | 80 mm | 4.5 | 63 |
| December | 8.3°C | 2.4°C | 79 mm | 8.8 | 47 |
| Year | 14.7°C | 6.8°C | 768 mm | 39 | 1,570 |
Met Office historic station data, Ross-On-Wye, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Builth Wells 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 Powys 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 |
|---|---|---|---|
| Builth Wells | 20.5°C | 1.5°C | 1,121 mm |
| Llandrindod Wells 6.6 mi | 20.7°C about the same | 1.0°C about the same | 1,089 mm |
| Rhayader 11.6 mi | 18.8°C 1.7°C cooler | 1.0°C about the same | 1,453 mm |
Builth Wells 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 | 7.0°C 45°F | 1.5°C 35°F | 4.2°C | 129 mm 5.1 in |
| February | 7.6°C 46°F | 1.5°C 35°F | 4.5°C | 99 mm 3.9 in |
| March | 10.0°C 50°F | 2.7°C 37°F | 6.3°C | 81 mm 3.2 in |
| April | 13.0°C 55°F | 4.2°C 40°F | 8.6°C | 70 mm 2.8 in |
| May | 16.3°C 61°F | 6.9°C 44°F | 11.6°C | 71 mm 2.8 in |
| June | 18.9°C 66°F | 9.6°C 49°F | 14.2°C | 67 mm 2.6 in |
| July | 20.5°C 69°F | 11.4°C 53°F | 16.0°C | 69 mm 2.7 in |
| August | 20.0°C 68°F | 11.3°C 52°F | 15.7°C | 79 mm 3.1 in |
| September | 17.6°C 64°F | 9.1°C 48°F | 13.4°C | 77 mm 3.0 in |
| October | 13.7°C 57°F | 6.8°C 44°F | 10.2°C | 122 mm 4.8 in |
| November | 9.9°C 50°F | 3.9°C 39°F | 6.9°C | 119 mm 4.7 in |
| December | 7.5°C 45°F | 1.9°C 35°F | 4.7°C | 138 mm 5.4 in |
| Year | 13.5°C | 5.9°C | 9.7°C | 1,121 mm |
Where Builth Wells’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 Builth Wells’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 Ross-On-Wye, 39 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 Builth Wells’s climate
How warm does Builth Wells get in summer?
July is the warmest month, with average highs of 20.5°C (69°F). About 7 days a year reach 25°C (77°F), fewer than 66% of UK towns.
How cold does Builth Wells get in winter?
February nights average 1.5°C (35°F). The air drops below freezing on about 52 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Builth Wells get?
About 1,121 mm (44 in) a year, more than 86% of UK towns. December is the wettest month (138 mm) and June the driest (67 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Ross-on-Wye (39 miles away), averages 1,570 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 Builth Wells. 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 Builth Wells →
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