An analysis of U.S. cities shows more than half are having one of their 5 hottest years on record.
The cool days of late November will turn warmer on average in the coming decades.
An examination of how high temperatures throughout the year are projected to rise by the end of the century under two different emissions scenarios.
Halloween weather can be highly variable depending on the year.
Later frosts mean longer growing seasons for the U.S.
This is how much the average frost-free season has changed since 1970.
The decrease in cool nights is one feature of an overall fall warming trend.
Climate change is altering important elements affecting fall foliage.