The United Kingdom recorded a record‑high temperature in May 2026, while a heat dome over Europe produced record‑high temperatures in multiple countries during the same month. France also recorded its hottest May day on record in May 2026.

Ireland recorded a new May maximum temperature of 28.8 °C at two weather stations, according to the Guardian. The Guardian also reported that temperatures across parts of Europe were about 10‑15 °C above average for the time of year in May 2026. French officials issued health warnings and ordered restrictions on outdoor work because of the heatwave, as reported by France 24. The South China Morning Post noted that Spain was expected to reach a temperature of 38 °C later in the week. ABC Australia reported that UK authorities issued a heat warning as temperatures rose to about 35 °C.

Accounts differ on June 2026 temperatures in the United Kingdom. Qatar reported that June 2026 was the second‑warmest June on record for the United Kingdom. Another source described the United Kingdom as having set a provisional June temperature record of 37.7 °C at Lingwood, Norfolk. Al Jazeera reported that England experienced its warmest June on record in 2026 and also that June 2026 was the second‑warmest June on record for the United Kingdom. GDELT reported the provisional June record of 37.7 °C, noting it beats the previous UK June record of 35.6 °C set in 1976.