May was warmer than average for most places of the UK. At the beginning of the month an unsettled westerly regime brought rain south-eastwards. Thereafter, temperatures and sunshine increased. The early-May Bank Holiday was the warmest since its introduction in 1978. Despite cooler temperatures, the second week remained dry and sunny for many parts. The second half of the month was dominated by high pressure and easterly winds bringing warm air and sunshine. However, it stayed cooler and cloudier along the east coast.