Coningsby is a village in Lincolnshire. Situated close to an RAF base and the Bain River, it is a peaceful area that most people pass by without pausing. The United Kingdom experienced its hottest day since reliable records began on July 19, 2022, when a thermometer there recorded 40.3°C, or 104.5 degrees Fahrenheit. Not just the hottest in a long time. the most hot. Never. Completely.
When you say that number out loud, it still seems a little surreal. A sunny bank holiday seems like a small miracle in Britain, a nation characterized in part by its relationship with gloomy skies and persistent drizzle. Even twenty years ago, it would have seemed ridiculous to think that it could reach temperatures more typical of the interior of Arizona or the outskirts of Madrid. And yet there it was, at the top of a list that no one really wanted to see extended, validated and confirmed by the Met Office.
It wasn’t an isolated incident. It had already been a harsh week before that record. The temperature at Heathrow had risen above 37°C. In the East Midlands, roads gave way. As the heat caused tracks to warp, rail networks imposed speed limits. In London, people fanned themselves with whatever was available, including newspapers and cardboard, while standing in whatever shade they could find. The city was not designed for this, and it was evident in both big and small ways.
Records from that era read like a roll call of locations that weren’t supposed to be on this kind of list. On July 18, the day before Coningsby’s peak, the temperature in Pitsford, Northamptonshire, reached 38.2°C. During the same hot week, Wales recorded its own record high, 37.1°C at Hawarden Airport in Flintshire. Charterhall in the Scottish Borders saw a temperature of 34.8°C. Even the figures for overnight minimums were concerning; Oxfordshire recorded the lowest nighttime temperature in England at 26.8°C, meaning that some places hardly cooled between sunset and sunrise.
Taking a moment to reflect on the accumulation of these records is worthwhile. In historical terms, the top ten hottest days in the UK are a relatively new phenomenon. The readings from 2019 and 2022 are at the top. 1990 and 2003 hold positions prior to that. Raunds gave a reading in Northamptonshire in 1911 that felt like a ceiling for many years. Records that were previously thought to be permanent are now being reclassified as way stations rather than endpoints on a longer trend.
When Kew Gardens in west London temporarily recorded 35.1°C in late May 2026—breaking the UK’s all-time May temperature record for the second day in a row—that trend showed no signs of slowing.
Even by midsummer standards, the Met Office described it as extraordinary. Hundreds of homes in Sussex and Kent that were left without supply due to the unexpected spike in demand were receiving an apology from South East Water. For welfare reasons, the Leatherhead Lions Club called off the donkey portion of their yearly bank holiday derby. Thousands of people in Gloucestershire watched the Cooper’s Hill cheese-rolling race despite the intense heat because some things in England just go on.
In comparison to the 1961–1990 baseline, the number of days in the UK above 28°C has more than doubled in the last ten years, and the number of days above 30°C has more than tripled, according to a Met Office observation that doesn’t require much interpretation. Out of the twelve monthly temperature records, seven are from 2003 or later. As this data accumulates year after year, it seems that the question of whether records will be broken has given way to one of when and how much.
The headline continues to be the 40.3°C recorded at Coningsby. However, it’s difficult to ignore the fact that it’s starting to resemble a preview rather than an anomaly.
