Summer 2026 is provisionally the hottest on record for the UK, with an average mean temperature of 16.5°C. That is the Met Office's verdict in its summer statistics, in a series that goes back to 1884. If you run a kitchen, an office or a shop, the practical question is what that does to the kit you rely on, and that comes after the numbers.
The headline figures
These are the numbers from the Met Office that stood out to us, all provisional unless stated.
- 16.5°C. The UK summer mean temperature. The previous record, 16.1°C, was set just last year. The Met Office says the margin is 0.40°C, which is a lot for a seasonal average.
- Seventh. Where the famous summer of 1976 now sits. The top five warmest summers have all come since 2003.
- 38.2°C. The summer's peak, at Hartpury College on 13 August.
- 54. The number of Met Office weather stations that broke their all-time daily maximum temperature record this summer.
The days that did it
Averages hide the part people remember, which is the run of days when it was properly hot. A Met Office blog on the daily temperatures counts them.
- 55 days above 28°C. The old record was 41 days, shared by 1976 and 1995. Summer 2026 added another 14.
- Nine days above 35°C. The Met Office calls this almost double the previous record, set in 2020.
- Every summer month above 35°C. It was the first year in which every summer month experienced temperatures above 35°C.
Those day counts come from the Met Office's gridded dataset, so the blog notes they can differ slightly from the station figures you may see elsewhere.
The records that arrived early
The heat did not wait for June. On 25 May, Kew Gardens reached 34.8°C, the highest temperature ever recorded in meteorological spring, beating the previous record of 32.8°C from 1922 and 1944. The Met Office added that breaking the old May record was around three times more likely in today's climate, and that "What was around a 1-in-100 year event is now around a 1-in-33 year event."
- 36.1°C at Gosport on 24 June. A provisional June record when it was reported, beating 35.6°C from 1976 and 1957. The Met Office's later summer review says Lingwood in Norfolk went further, reaching 38.0°C for a new June record.
- 6.5mm. The rain England recorded in July, its driest July on record in a series dating back to 1836. The previous record was 13.4mm, set in 1911.
The Met Office also puts the summer as a whole at roughly a 1 in 9 year event in today's climate. In its words, in a climate unaffected by human emissions it would have been "exceptionally unlikely".
What it means for next summer
The Met Office blog says 35°C days are now expected, on average, almost every other summer, and that "the UK will need further adaptation of infrastructure to cope with the increasing frequency of hot summers". It lists cooling homes and workplaces among the things to think about. That is the part we can help with.
Cooling equipment rejects heat into the air outside. The hotter that air, and the longer it stays hot, the harder a condenser has to work, and the more it shows up any weakness: a blocked coil, a low refrigerant charge, a unit that was marginal for the room on a normal day. We covered how this plays out in kitchens and cold rooms in our guide to the red heat-health alert.
What to do now
- Book servicing before May. This year's spring record fell on 25 May, so a service booked in late spring is already late. Autumn and winter give you the most room to plan a visit around your own trading. A routine air conditioning service is where coil cleaning and outdoor unit checks get done.
- Check sizing. If a room never cooled properly in the hot weeks, say so to your engineer. It may be the unit, or it may be that the room, the equipment in it or the number of people changed since it was installed.
- Look at the condensers. Clear space round outdoor units, remove leaf litter and debris, and make sure nothing is blocking airflow.
- Follow a checklist. Our sister-site guide to getting AC ready for summer is a good one to put in the diary for April.
