Photo: Jaggery · CC BY-SA 2.0Gilfach Goch sits near the top of UK towns for rain, with 2,103 mm (83 in) a year
Winter’s chill peaks in January, at about 0.8°C (34°F) after dark. None of its 6 nearest neighbours has colder January nights. December is the wettest month, May the driest. Central heating does most of its work from November to April, in months below 10°C on average.
Met Office 1991–2020 averages for the town itself.
A year in Gilfach Goch at a glance
Each month’s typical high and low, in °C.
What a year in Gilfach Goch feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 2,103 mm of rain a year
December is the wettest month and May the driest. About 77 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
A frosty town: 52 air frosts and 4 days of 25°C a year
On about 52 nights a year the air drops below freezing, and on about 3 days it stays below freezing all day. About 4 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 14 miles south-east of Gilfach Goch, 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 Gilfach Goch 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 Mid 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 |
|---|---|---|---|
| Gilfach Goch | 20.1°C | 0.8°C | 2,103 mm |
| Hendreforgan 0.7 mi | 20.3°C about the same | 1.5°C 0.7°C milder | 1,868 mm |
| Tonypandy 1.8 mi | 20.1°C about the same | 1.5°C 0.6°C milder | 2,101 mm |
| Tonyrefail 2.1 mi | 20.6°C about the same | 1.6°C 0.8°C milder | 1,865 mm |
| Ogmore Vale 3.0 mi | 19.9°C about the same | 1.4°C 0.6°C milder | 2,068 mm |
| Porth 3.2 mi | 19.9°C about the same | 1.7°C 0.9°C milder | 2,153 mm |
| Nant-y-moel 3.3 mi | 18.4°C 1.6°C cooler | 1.5°C 0.7°C milder | 2,478 mm |
Gilfach Goch 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 | 6.6°C 44°F | 0.8°C 34°F | 3.7°C | 241 mm 9.5 in |
| February | 7.5°C 46°F | 1.5°C 35°F | 4.5°C | 179 mm 7.0 in |
| March | 9.7°C 49°F | 2.6°C 37°F | 6.1°C | 154 mm 6.0 in |
| April | 12.7°C 55°F | 4.2°C 40°F | 8.4°C | 118 mm 4.6 in |
| May | 15.8°C 60°F | 6.8°C 44°F | 11.4°C | 115 mm 4.5 in |
| June | 18.4°C 65°F | 9.8°C 50°F | 14.1°C | 119 mm 4.7 in |
| July | 20.1°C 68°F | 11.8°C 53°F | 15.9°C | 130 mm 5.1 in |
| August | 19.7°C 67°F | 11.4°C 53°F | 15.7°C | 160 mm 6.3 in |
| September | 17.5°C 64°F | 9.4°C 49°F | 13.4°C | 159 mm 6.3 in |
| October | 13.7°C 57°F | 6.6°C 44°F | 10.2°C | 236 mm 9.3 in |
| November | 10.1°C 50°F | 4.0°C 39°F | 7.0°C | 234 mm 9.2 in |
| December | 7.8°C 46°F | 2.0°C 36°F | 4.9°C | 261 mm 10.3 in |
| Year | 13.3°C | 5.9°C | 9.6°C | 2,103 mm |
Where Gilfach Goch’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 Gilfach Goch’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, 14 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 Gilfach Goch’s climate
How warm does Gilfach Goch get in summer?
July is the warmest month, with average highs of 20.1°C (68°F). About 4 days a year reach 25°C (77°F), fewer than 81% of UK towns.
How cold does Gilfach Goch get in winter?
January nights average 0.8°C (34°F). The air drops below freezing on about 52 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Gilfach Goch get?
About 2,103 mm (83 in) a year, more than almost every UK town. December is the wettest month (261 mm) and May the driest (115 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 Gilfach Goch. 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 Gilfach Goch →
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.