Hardly any UK towns collect more rain than Bryn: 1,590 mm (63 in) a year
A clear January night here typically dips to 2.3°C (36°F). The rainiest month is January; the driest is April. Its January nights stay gentler than in 78% of UK towns. The heating season runs November to April: each of those months averages under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in Bryn at a glance
Each month’s typical high and low, in °C.
What a year in Bryn feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,590 mm of rain a year
January is the wettest month and April the driest. About 64 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
34 air frosts and 6 days of 25°C a year
On about 34 nights a year the air drops below freezing, and on about under 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 Cardiff Bute Park
Cardiff Bute Park is 24 miles east of Bryn, 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 Bryn 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 West Glamorgan 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 |
|---|---|---|---|
| Bryn | 20.6°C | 2.3°C | 1,590 mm |
| Cwmavon 1.9 mi | 20.6°C about the same | 2.7°C about the same | 1,569 mm |
| Maesteg 2.5 mi | 18.8°C 1.8°C cooler | 2.1°C about the same | 2,076 mm |
| Port Talbot 3.7 mi | 21.4°C 0.8°C warmer | 3.9°C 1.6°C milder | 1,240 mm |
| Croeserw 3.8 mi | 19.0°C 1.6°C cooler | 1.6°C 0.7°C colder | 2,409 mm |
| Pont Rhyd-y-cyff 4.0 mi | 19.7°C 0.9°C cooler | 2.3°C about the same | 1,732 mm |
| Baglan 4.4 mi | 21.3°C 0.7°C warmer | 3.7°C 1.4°C milder | 1,283 mm |
Bryn 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 | 7.7°C 46°F | 2.3°C 36°F | 5.0°C | 184 mm 7.2 in |
| February | 8.4°C 47°F | 2.7°C 37°F | 5.6°C | 116 mm 4.5 in |
| March | 10.4°C 51°F | 3.7°C 39°F | 7.1°C | 112 mm 4.4 in |
| April | 13.3°C 56°F | 5.2°C 41°F | 9.3°C | 85 mm 3.4 in |
| May | 16.5°C 62°F | 8.1°C 47°F | 12.4°C | 91 mm 3.6 in |
| June | 19.1°C 66°F | 10.7°C 51°F | 14.8°C | 102 mm 4.0 in |
| July | 20.6°C 69°F | 12.6°C 55°F | 16.6°C | 129 mm 5.1 in |
| August | 20.3°C 69°F | 12.7°C 55°F | 16.5°C | 139 mm 5.5 in |
| September | 18.2°C 65°F | 10.8°C 51°F | 14.5°C | 123 mm 4.8 in |
| October | 14.7°C 58°F | 8.3°C 47°F | 11.5°C | 168 mm 6.6 in |
| November | 11.1°C 52°F | 5.4°C 42°F | 8.2°C | 167 mm 6.6 in |
| December | 8.7°C 48°F | 3.2°C 38°F | 6.0°C | 175 mm 6.9 in |
| Year | 14.1°C | 7.1°C | 10.6°C | 1,590 mm |
Where Bryn’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 Bryn’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 Cardiff Bute Park, 24 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 Bryn’s climate
How warm does Bryn get in summer?
July is the warmest month, with average highs of 20.6°C (69°F). About 6 days a year reach 25°C (77°F), fewer than 73% of UK towns.
How cold does Bryn get in winter?
January nights average 2.3°C (36°F). The air drops below freezing on about 34 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Bryn get?
About 1,590 mm (63 in) a year, more than 97% of UK towns. January is the wettest month (184 mm) and April the driest (85 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 Bryn. 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 Bryn →
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