Seasons

Arctic sea ice reaches its maximum extent this month. The Sea Ice Index houses a repository of data used to track sea ice trends and changes.

NCEI’s environmental data provide critical information for retailers, manufacturers, and the companies that invest in them.

The NOAA/NASA Suomi National Polar-orbiting Partnership satellite shows how the holidays affect nighttime light intensity around the globe.

See which places have the best chance of being a winter wonderland on December 25 according to weather history.

Forecasters are predicting some impacts from La Niña conditions this winter in outlooks for the Midwest, Great Lakes, and Missouri basin.

Our maps help identify which day of the year, on average, has the highest maximum temperature across the United States.

Based on 30 years of climate records, our map shows when you can expect to see temperatures dip to 32°F or below for the last time.

Find out when you should expect the coldest day of the year in your area with our map based on the U.S. Climate Normals.

Meteorologists and climatologists define seasons differently from “regular” or astronomical spring, summer, fall, and winter.