United Kingdom

The United Kingdom has a temperate maritime climate: mild year-round, rarely extreme, and famously changeable. London and the south average 6°C in January and 22°C in July, while Edinburgh and the north run 2-3 degrees cooler. Rain is spread across the year, with the wettest months typically October through January in the west (Wales, Scotland, northwest England) and more evenly distributed in the southeast. May, June, and September offer the best combination of mild temperatures, longer daylight, and lower rainfall. July and August are the warmest and busiest months, though heatwaves above 30°C are rare and short-lived. Scotland’s Highlands get reliable snow from December to March for the Cairngorms and Glencoe ski areas, while Cornwall and Devon’s microclimate often delivers the mildest winter temperatures on the mainland.