A record-smashing hurricane season in the central North Pacific. Water rationing in Puerto Rico. The biggest one-year jump in atmospheric carbon dioxide concentrations. These and more of 2015's extreme events had one thing in common: El Niño.
If you had to pick your Fourth of July picnic location based solely on past weather, where does the climate record say you'll have the least chance of rain? Our interactive map shows historic odds of rain on your parade.