NOAA

government

Last mentioned: Mar 4, 2026

Timeline

Jan 1, 2026
Current Data Release

New mapping confirms 50-year warming trend across nearly all major U.S. metropolitan areas.
Jan 1, 2012
Record Early Spring

One of the earliest recorded 'first leaf' dates across the Eastern U.S., leading to major crop losses.
Invalid Date
Acceleration

Spring warming begins to outpace other seasons in the Southwest and Northeast.
Jan 1, 1970
Baseline Year

Modern climatological records begin tracking the current warming trend in earnest.

Stories mentioning NOAA 1

U.S. Spring Temperatures Rise Sharply: Analyzing 50 Years of Seasonal Warming

New climatological data reveals that spring temperatures across the United States have risen by an average of 2.2°F since 1970, with some regions seeing increases of over 5°F. This shift is shortening winters, extending allergy seasons, and creating volatile conditions for the agricultural sector.

Mar 4, 2026 2 sources