Image caption
Graph showing how much cooler or warmer than average it was in Houston, TX in January 2025. The graph also marks the date when the first signs of spring appear (also known as 'first leaf' or 'leaf out') on average (January 22), as well as when it occurred this year (January 31). Colder than average temperatures led to spring leaf out arriving as much as nine days late. To check on the arrival of spring at a different location, visit the USA National Phenology Network's visualization tool.