Few UK towns get more rain than Llansteffan: 1,344 mm (53 in) a year
About 1,344 mm (53 in) of rain falls in a typical year; July afternoons reach 19.8°C (68°F) and January nights drop to 2.2°C (36°F). Only about 4 days a year reach 25°C, fewer than in 92% of UK towns. In January, nights here are milder than in 72% of UK towns.
A year in Llansteffan at a glance
Each month’s typical high and low, in °C.
What a year in Llansteffan feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,344 mm of rain a year
December is the wettest month and May the driest. About 46 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Aberporth
44 air frosts and 4 days of 25°C a year
On about 44 nights a year the air drops below freezing, and on about under 1 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 Aberporth
Aberporth is 26 miles north of Llansteffan, 133 m (436 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 | 7.8°C | 3.4°C | 90 mm | 4.5 | 60 |
| February | 7.9°C | 3.3°C | 67 mm | 3.8 | 79 |
| March | 9.4°C | 4.2°C | 58 mm | 1.8 | 127 |
| April | 11.6°C | 5.7°C | 54 mm | 0.4 | 172 |
| May | 14.3°C | 8.2°C | 55 mm | 0.0 | 210 |
| June | 16.6°C | 10.7°C | 64 mm | 0.0 | 203 |
| July | 18.3°C | 12.5°C | 67 mm | 0.0 | 187 |
| August | 18.3°C | 12.7°C | 75 mm | 0.0 | 169 |
| September | 16.7°C | 11.2°C | 71 mm | 0.0 | 141 |
| October | 13.6°C | 8.9°C | 107 mm | 0.0 | 99 |
| November | 10.5°C | 6.2°C | 117 mm | 0.6 | 59 |
| December | 8.5°C | 4.1°C | 107 mm | 3.5 | 49 |
| Year | 12.8°C | 7.6°C | 931 mm | 15 | 1,554 |
Met Office historic station data, Aberporth, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Llansteffan compares
Against the 2,178 towns and cities of 2,500 or more in England and Wales, each with its own Met Office averages, and its place among Dyfed 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 |
|---|---|---|---|
| Llansteffan | 19.8°C | 2.2°C | 1,344 mm |
| Kidwelly 4.5 mi | 20.0°C about the same | 2.6°C about the same | 1,268 mm |
| St Clears 5.6 mi | 20.8°C 1.0°C warmer | 2.2°C about the same | 1,337 mm |
| Carmarthen 6.8 mi | 20.2°C about the same | 2.2°C about the same | 1,459 mm |
| Trimsaran 7.2 mi | 20.1°C about the same | 2.2°C about the same | 1,343 mm |
| Pontyates 7.3 mi | 19.6°C about the same | 2.2°C about the same | 1,490 mm |
| Carway 7.5 mi | 20.1°C about the same | 2.2°C about the same | 1,349 mm |
Llansteffan 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 | 7.8°C 46°F | 2.2°C 36°F | 5.0°C | 140 mm 5.5 in |
| February | 8.3°C 47°F | 2.2°C 36°F | 5.2°C | 101 mm 4.0 in |
| March | 10.2°C 50°F | 3.1°C 38°F | 6.6°C | 88 mm 3.5 in |
| April | 12.9°C 55°F | 4.7°C 40°F | 8.7°C | 83 mm 3.3 in |
| May | 15.8°C 60°F | 7.1°C 45°F | 11.4°C | 81 mm 3.2 in |
| June | 18.2°C 65°F | 9.9°C 50°F | 14.0°C | 82 mm 3.2 in |
| July | 19.8°C 68°F | 11.8°C 53°F | 15.8°C | 86 mm 3.4 in |
| August | 19.6°C 67°F | 11.8°C 53°F | 15.6°C | 115 mm 4.5 in |
| September | 17.7°C 64°F | 9.7°C 50°F | 13.7°C | 107 mm 4.2 in |
| October | 14.3°C 58°F | 7.4°C 45°F | 10.8°C | 153 mm 6.0 in |
| November | 10.9°C 52°F | 4.5°C 40°F | 7.7°C | 155 mm 6.1 in |
| December | 8.5°C 47°F | 2.7°C 37°F | 5.6°C | 155 mm 6.1 in |
| Year | 13.7°C | 6.4°C | 10.0°C | 1,344 mm |
Where Llansteffan’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 Llansteffan’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 Aberporth, 26 miles away, months of 1991–2020 averaged.
- Comparisons: every town and city of 2,500 or more in England and Wales, read the same way.
Met Office HadUK-Grid · Met Office Climate Data Portal · Historic station data. Open Government Licence v3.0.
Questions about Llansteffan’s climate
How warm does Llansteffan get in summer?
July is the warmest month, with average highs of 19.8°C (68°F). About 4 days a year reach 25°C (77°F), fewer than 92% of UK towns.
How cold does Llansteffan get in winter?
January nights average 2.2°C (36°F). The air drops below freezing on about 44 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Llansteffan get?
About 1,344 mm (53 in) a year, more than 95% of UK towns. December is the wettest month (155 mm) and May the driest (81 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Aberporth (26 miles away), averages 1,554 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 Llansteffan. 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 Llansteffan →
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