
The “global warming”
United Kingdom
The most comparable previous years:
Year
How many years ago
What happened
2025
1 year
The warmest full summer in UK recorded history – an average of 16.1°C
2022
4 years
The first officially recorded 40°C in the UK – a record of 40.3°C
2018
8 years
At the time, the second warmest summer; prolonged heat and drought
2006
20 years
One of the five warmest summers on record
2003
23 years
A very hot summer in the UK and a catastrophic heatwave in Europe
1995
31 years
The longest recorded British heatwave – 39 days
1976
50 years
The famous major drought and 16 days above 32°C
1947
79 years
A heatwave lasting approximately 26 days
1933
93 years
The warmest summer on record until 1976
The Met Office states that 1976 still holds the record for the highest average summer maximum temperature. The summer of 2025 was warmer in terms of the overall mean temperature, but the daytime heat in 1976 was more persistent: 16 days above 32°C compared with nine in 2025. Met Office comparison: 2025 and 1976