Tredegar is among the wettest of UK towns: 1,612 mm (63 in) of rain a year
The warmest part of a July day comes in at 19.5°C (67°F) on average. A year here swings 19°C from midwinter lows to midsummer highs. In January, nights here are colder than in 83% of UK towns. Frost greets about 48 mornings a year, so leave time to clear the car.
Met Office 1991–2020 averages for the town itself.
A year in Tredegar at a glance
Each month’s typical high and low, in °C.
What a year in Tredegar feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,612 mm of rain a year
December is the wettest month and June the driest. About 55 days a year bring 10 mm (0.4 in) or more. 7th wettest of 38 Gwent towns of 2,500+.
Rain by month
Millimetres
48 air frosts and 5 days of 25°C a year
On about 48 nights a year the air drops below freezing, and on about 3 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 Cardiff Bute Park
Cardiff Bute Park is 20 miles south of Tredegar, 9 m (30 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 |
|---|---|---|---|---|
| January | 8.6°C | 2.5°C | 127 mm | 8.1 |
| February | 9.1°C | 2.5°C | 93 mm | 7.5 |
| March | 11.3°C | 3.9°C | 85 mm | 3.9 |
| April | 14.4°C | 5.7°C | 72 mm | 1.4 |
| May | 17.4°C | 8.5°C | 78 mm | 0.0 |
| June | 20.1°C | 11.3°C | 73 mm | 0.0 |
| July | 21.8°C | 13.1°C | 84 mm | 0.0 |
| August | 21.4°C | 12.9°C | 105 mm | 0.0 |
| September | 19.1°C | 10.7°C | 87 mm | 0.0 |
| October | 15.2°C | 8.0°C | 128 mm | 1.0 |
| November | 11.6°C | 4.9°C | 131 mm | 3.7 |
| December | 9.1°C | 2.9°C | 140 mm | 8.3 |
| Year | 14.9°C | 7.2°C | 1,201 mm | 34 |
Met Office historic station data, Cardiff Bute Park, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Tredegar 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 Gwent 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 |
|---|---|---|---|
| Tredegar | 19.5°C | 1.3°C | 1,612 mm |
| Ebbw Vale 1.4 mi | 18.9°C 0.6°C cooler | 1.0°C about the same | 1,705 mm |
| Rhymney 2.1 mi | 19.4°C about the same | 1.1°C about the same | 1,677 mm |
| Abertysswg 2.5 mi | 19.4°C about the same | 1.5°C about the same | 1,721 mm |
| Pontlottyn 2.7 mi | 19.3°C about the same | 1.1°C about the same | 1,722 mm |
| Brynmawr 3.3 mi | 19.4°C about the same | 1.1°C about the same | 1,522 mm |
| Nantyglo 3.3 mi | 19.0°C 0.5°C cooler | 1.0°C about the same | 1,537 mm |
Tredegar 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 | 1.3°C 34°F | 3.7°C | 192 mm 7.5 in |
| February | 6.4°C 44°F | 0.8°C 33°F | 3.6°C | 144 mm 5.7 in |
| March | 8.6°C 48°F | 2.0°C 36°F | 5.4°C | 114 mm 4.5 in |
| April | 11.8°C 53°F | 3.7°C 39°F | 7.7°C | 95 mm 3.7 in |
| May | 15.1°C 59°F | 6.4°C 44°F | 10.7°C | 94 mm 3.7 in |
| June | 17.8°C 64°F | 9.3°C 49°F | 13.5°C | 91 mm 3.6 in |
| July | 19.5°C 67°F | 11.1°C 52°F | 15.3°C | 100 mm 3.9 in |
| August | 19.0°C 66°F | 11.1°C 52°F | 15.1°C | 114 mm 4.5 in |
| September | 16.6°C 62°F | 8.9°C 48°F | 12.8°C | 115 mm 4.5 in |
| October | 12.8°C 55°F | 6.6°C 44°F | 9.7°C | 171 mm 6.7 in |
| November | 9.1°C 48°F | 3.6°C 39°F | 6.3°C | 182 mm 7.2 in |
| December | 6.7°C 44°F | 1.6°C 35°F | 4.1°C | 201 mm 7.9 in |
| Year | 12.5°C | 5.5°C | 9.0°C | 1,612 mm |
Where Tredegar’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 1 Met Office 2 km grid square whose centre lies inside Tredegar’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 Cardiff Bute Park, 20 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 Tredegar’s climate
How warm does Tredegar get in summer?
July is the warmest month, with average highs of 19.5°C (67°F). About 5 days a year reach 25°C (77°F), fewer than 76% of UK towns.
How cold does Tredegar get in winter?
February nights average 0.8°C (33°F). The air drops below freezing on about 48 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Tredegar get?
About 1,612 mm (63 in) a year, more than 98% of UK towns. December is the wettest month (201 mm) and June the driest (91 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 Tredegar. 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 Tredegar →
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