Midwinter lows in Haverfordwest stay above those of 94% of UK towns
Midsummer highs settle at about 19.5°C (67°F). It is a wet place: more rain falls here than on 92% of UK towns. Winter and summer sit 17°C apart. Gritters and ice scrapers earn their keep on roughly 27 nights a year below 0°C.
Met Office 1991–2020 averages for the town itself.
A year in Haverfordwest at a glance
Each month’s typical high and low, in °C.
What a year in Haverfordwest feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,264 mm of rain a year
November is the wettest month and April the driest. About 41 days a year bring 10 mm (0.4 in) or more. 13th wettest of 23 Dyfed towns of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Aberporth
27 air frosts and 4 days of 25°C a year
On about 27 nights a year the air drops below freezing; days that stay below freezing are rare. 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 29 miles north-east of Haverfordwest, 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 Haverfordwest 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 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 |
|---|---|---|---|
| Haverfordwest | 19.5°C | 3.0°C | 1,264 mm |
| Merlin's Bridge 1.0 mi | 19.5°C about the same | 2.7°C about the same | 1,273 mm |
| Crundale 2.0 mi | 19.4°C about the same | 3.0°C about the same | 1,274 mm |
| Johnston 3.2 mi | 19.2°C about the same | 2.8°C about the same | 1,184 mm |
| Neyland 6.4 mi | 19.9°C about the same | 2.8°C about the same | 1,194 mm |
| Milford Haven 6.5 mi | 19.2°C about the same | 4.2°C 1.2°C milder | 1,101 mm |
| Pembroke Dock 7.8 mi | 19.6°C about the same | 3.6°C 0.5°C milder | 1,193 mm |
Haverfordwest 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 | 8.8°C 48°F | 3.0°C 37°F | 6.1°C | 120 mm 4.7 in |
| February | 8.4°C 47°F | 2.6°C 37°F | 5.5°C | 86 mm 3.4 in |
| March | 10.1°C 50°F | 3.5°C 38°F | 6.8°C | 87 mm 3.4 in |
| April | 12.8°C 55°F | 4.9°C 41°F | 8.9°C | 71 mm 2.8 in |
| May | 15.6°C 60°F | 7.4°C 45°F | 11.5°C | 81 mm 3.2 in |
| June | 18.0°C 64°F | 10.2°C 50°F | 14.0°C | 86 mm 3.4 in |
| July | 19.5°C 67°F | 12.2°C 54°F | 15.6°C | 80 mm 3.2 in |
| August | 19.5°C 67°F | 11.8°C 53°F | 15.6°C | 103 mm 4.1 in |
| September | 17.7°C 64°F | 10.0°C 50°F | 13.8°C | 99 mm 3.9 in |
| October | 14.3°C 58°F | 8.0°C 46°F | 11.1°C | 144 mm 5.7 in |
| November | 11.2°C 52°F | 5.6°C 42°F | 8.3°C | 161 mm 6.3 in |
| December | 8.9°C 48°F | 3.0°C 37°F | 5.9°C | 147 mm 5.8 in |
| Year | 13.7°C | 6.8°C | 10.3°C | 1,264 mm |
Where Haverfordwest’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 Haverfordwest’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 Aberporth, 29 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 Haverfordwest’s climate
How warm does Haverfordwest get in summer?
August is the warmest month, with average highs of 19.5°C (67°F). About 4 days a year reach 25°C (77°F), fewer than 82% of UK towns.
How cold does Haverfordwest get in winter?
February nights average 2.6°C (37°F). The air drops below freezing on about 27 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Haverfordwest get?
About 1,264 mm (50 in) a year, more than 92% of UK towns. November is the wettest month (161 mm) and April the driest (71 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Aberporth (29 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 Haverfordwest. 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 Haverfordwest →
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.