The United Kingdom recorded its hottest May Day temperature on record on May 1, 2024, with peak readings reaching 34.8°C [1].
This temperature spike is significant because it breaks a record that had stood since 1944 [5]. The event highlights a growing trend of extreme spring weather patterns in Northern Europe.
Measurements were reported at two primary London sites: Kew Gardens and Heathrow Airport [1]. While some reports cite the peak of 34.8°C [1], [2] at Heathrow, other data suggests the temperature there was 33.6°C [4]. Another report listed the London temperature at 34°C [3].
Meteorologists said the extreme heat was due to a heat dome over the UK. This atmospheric phenomenon traps warm air near the surface, preventing it from escaping into the upper atmosphere, and leads to prolonged periods of high temperatures.
Such conditions created significant disruption across the country. During the heatwave, travelers faced nearly three-hour waits at the Port of Dover as the region baked under the unusual warmth [2].
The discrepancy in exact readings across different monitoring stations is common during rapid heat spikes. However, the consensus among reporting agencies remains that the May 1, 2024, event surpassed all previous May Day records [1], [2], [3].
“The UK recorded its hottest May Day temperature on record on May 1, 2024.”
The occurrence of a record-breaking heatwave in early May indicates a shift in seasonal temperature baselines for the UK. The presence of a 'heat dome' suggests that stagnant high-pressure systems are becoming more effective at trapping heat earlier in the year, which may increase the frequency of extreme weather events during the spring transition.
