Increasing greenhouse gas buildup and exceptionally high ocean temperatures drove the significantly hot conditions, the new report said.

Map of the U.S. notable weather and climate events in 2025.

With an annual average temperature of 72.6 degrees, 2025 ended up tied with 2023 for the second-hottest year on record in San Antonio.

January was America's coldest in over three decades, but it wasn't enough to keep the planet from setting another monthly global warmth record, according to just released data. January shivering: January 2025 was the Lower 48's chilliest January since 1988 ...

The world warmed to yet another monthly heat record in January, despite an abnormally chilly United States, a cooling La Nina and predictions of a slightly less hot 2025, according to the European climate service Copernicus. The surprising January heat ...