State of the UK Climate in 2025

This report provides a summary of the state of the UK's climate in 2025. It presents the latest assessment of UK climate trends, variations and extremes based on the most up to date observations from the land network of weather stations. These observations are placed into context using long-running climate series extending back to the 19th Century. 

The key findings of the report state that the UK's climate has warmed at approximately 0.25°C per decade since the 1980s. Changes can be seen on annual, seasonal, monthly and daily timescales, with extremes affected most.

• 2025 was the warmest year in the UK series from 1884, with the last 4 years in the top five warmest. This is the sixth time this century this record has been set.
• 2025 included the UK's warmest spring and summer, with the six months, March to August, all in the top ten warmest of their respective monthly series.
• The most recent decade, 2016–2025, has been 0.51°C warmer than 1991–2020, and 1.33°C warmer than 1961–1990, with warming extending northwards and uphill.
• The number of days over 30°C and nights over 18°C has more than quadrupled for Greater London for the most recent decade, 2016–2025, compared to 1961–1990.
• The average hottest day of the year has warmed by over 4.5°C in a swathe from Kent to Lincolnshire for the most recent decade, 2016–2025, compared to 1961–1990.
• The number of ‘icing days’ (maximum temperature below 0°C) has more than halved for the UK for the most recent decade, 2016–2025, compared to 1961–1990, and the number of hard frosts (minimum temperature below −8°C) has reduced by a factor of more than four.