A record-breaking heatwave affected Iceland from May 6 to 15, 2025, with temperatures reaching 26.6°C (79.9°F) at Egilsstaðir Airport and setting a new national May temperature record. The 10-day event was described by the Icelandic Meteorological Office as the most significant May heatwave in the country’s meteorological history.
The United Arab Emirates recorded 51.6°C (124.9°F) in the town of Sweihan, Al Ain Region, Emirate of Abu Dhabi, at 13:45 LT (09:45 UTC) on May 25, 2025, breaking the country’s May temperature record for the second consecutive day, just 0.4°C (0.7°F) below the all-time national maximum.
Havana’s Casablanca weather station recorded 38°C (100.4°F) on May 20, 2025, setting a new May temperature record. This surpassed the previous high of 37.3°C (99.1°F) recorded on May 19, 2024, according to Cuba’s Institute of Meteorology (INSMET).
A strong cold outbreak gripped southeastern Australia on May 20, 2025, causing widespread frost and record-breaking low temperatures across Victoria and parts of South Australia. Coldstream dropped to -5.5°C (22.1°F), Morwell reached -3.9°C (25.0°F), Kanagulk -4.1°C (24.6°F), and Ballarat -3.0°C (26.6°F) during the state’s coldest morning so far this year.Coldstream dropped to –5.5°C (22.1°F), Morwell reached –3.9°C (25.0°F), Kanagulk –4.1°C (24.6°F), and Ballarat –3.0°C (26.6°F) during the state’s coldest morning so far this year.
Camp Mabry broke a 100-year-old daily heat on Thursday, May 15, 2025, as an early-season heat wave caused multiple daily heat records to break across south-central Texas. The heat wave is forecast to continue through the weekend into the next week, with some areas expected to see the highest May temperatures on record.
Charleston, South Carolina, set a new daily rainfall record on Sunday, May 11, 2025, after a moisture-laden storm system brought prolonged periods of heavy rain to the region. The event marked the highest recorded precipitation for that date at Charleston International Airport, with widespread impacts extending across the Southeast and mid-Atlantic. Flash flood threats are expected to persist through Wednesday, May 14, according to the Weather Prediction Center (WPC).
Record rains drenched New Orleans on Wednesday, May 7, 2025, as severe storms brought flash floods and strong gusts to parts of Louisiana, causing widespread damage.
A powerful storm system drenched Southern Nevada on May 6, triggering flash flood warnings, airport delays, and a swift-water rescue in Henderson after a man was swept into a wash and disappeared. Rainfall totals shattered multiple records across the Las Vegas Valley, with Harry Reid International Airport logging the highest May rainfall in over five decades.
Record-breaking temperatures were measured in Japan on Wednesday, March 26, 2025, with 143 stations either tying or breaking the record for the hottest March day on record.
Beijing recorded its earliest 30°C (86°F) temperature in 66 years on March 22, 2025, as an early heat wave spread across northeastern China.
