Pembrokeshire There are three weather stations in Pembrokeshire: at Tenby, Milford Haven and Penycwm, all on the coast. Milford Haven enjoys a mild climate and Tenby shows a similar range of temperatures throughout the year, while at Penycwm, on the west coast and 100m above sea level, temperatures are slightly lower. Pembrokeshire, though, featured twice in the 2016 wettest places in Wales at Whitechurch in the north of the county (1,390.4mm) and Scolton Country Park (1,284.8mm), near Haverfordwest. Orielton was the tenth driest place in Wales in 2016. The county has on average the highest coastal winter temperatures in Wales due
Pembrokeshire to its proximity to the relatively warm Atlantic Ocean. Inland, average temperatures tend to fall 0.5 °C for each 100 metres increase in height. The air pollution rating of Pembrokeshire is "Good", the lowest rating. The rocks in the county were formed between 600 and 290 million years ago. More recent rock formations were eroded when sea levels rose 80 million years ago, at the end of the Cretaceous Period. Around 60 million years ago, the Pembrokeshire landmass emerged through a combination of uplift and falling sea levels; the youngest rocks, from the Carboniferous Period, contain the Pembrokeshire Coalfield. The