Regardless if Punxsutawney Phil sees his shadow or not, spring is coming earlier across the U.S.
2015 was the 2nd hottest year on record for the U.S.
For most of the country, winter is warming faster than the other three seasons.
Increasing greenhouse gases are the overwhelming reason why 2015 will be the hottest year on record.
Halloween comes during a time of year that has highly variable weather.
What we know about hurricanes and climate change.
Through the first nine months of the year, 2015 has been the hottest on record globally.
This week marks the date of the 30-year future setting from the Back to the Future trilogy.