Photo: John Lord · CC BY-SA 2.0Wattstown sits near the top of UK towns for rain, with 2,114 mm (83 in) a year
Midsummer highs settle at about 20.0°C (68°F). Frosty nights outnumber those of 78% of UK towns. Wet weather is most frequent in December and least in May. 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 Wattstown at a glance
Each month’s typical high and low, in °C.
What a year in Wattstown feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 2,114 mm of rain a year
December is the wettest month and May the driest. About 74 days a year bring 10 mm (0.4 in) or more.
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 2 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 14 miles south-east of Wattstown, 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 Wattstown 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 |
|---|---|---|---|
| Wattstown | 20.0°C | 1.5°C | 2,114 mm |
| Tylorstown and Pontygwaith 0.8 mi | 20.0°C about the same | 1.5°C about the same | 2,114 mm |
| Porth 1.7 mi | 19.9°C about the same | 1.7°C about the same | 2,153 mm |
| Tonypandy 1.9 mi | 20.1°C about the same | 1.5°C about the same | 2,101 mm |
| Ferndale 2.2 mi | 19.5°C about the same | 1.2°C about the same | 2,382 mm |
| Rhondda 2.5 mi | 19.5°C about the same | 1.7°C about the same | 2,402 mm |
| Ynysybwl 2.7 mi | 20.3°C about the same | 1.9°C about the same | 1,800 mm |
Wattstown 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 | 6.8°C 44°F | 1.5°C 35°F | 4.1°C | 252 mm 9.9 in |
| February | 7.3°C 45°F | 1.6°C 35°F | 4.5°C | 179 mm 7.0 in |
| March | 9.5°C 49°F | 2.7°C 37°F | 6.1°C | 154 mm 6.0 in |
| April | 12.5°C 55°F | 4.2°C 40°F | 8.4°C | 118 mm 4.6 in |
| May | 15.8°C 60°F | 7.0°C 45°F | 11.4°C | 115 mm 4.5 in |
| June | 18.2°C 65°F | 9.8°C 50°F | 14.1°C | 119 mm 4.7 in |
| July | 20.0°C 68°F | 11.6°C 53°F | 15.9°C | 130 mm 5.1 in |
| August | 19.6°C 67°F | 11.5°C 53°F | 15.7°C | 160 mm 6.3 in |
| September | 17.3°C 63°F | 9.5°C 49°F | 13.4°C | 159 mm 6.3 in |
| October | 13.4°C 56°F | 6.9°C 44°F | 10.2°C | 236 mm 9.3 in |
| November | 9.8°C 50°F | 4.2°C 40°F | 7.0°C | 234 mm 9.2 in |
| December | 7.5°C 46°F | 2.2°C 36°F | 4.9°C | 261 mm 10.3 in |
| Year | 13.1°C | 6.1°C | 9.6°C | 2,114 mm |
Where Wattstown’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 Wattstown’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 Wattstown’s climate
How warm does Wattstown get in summer?
July is the warmest month, with average highs of 20.0°C (68°F). About 5 days a year reach 25°C (77°F), fewer than 75% of UK towns.
How cold does Wattstown get in winter?
January nights average 1.5°C (35°F). The air drops below freezing on about 48 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Wattstown get?
About 2,114 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 Wattstown. 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 Wattstown →
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