St. Patrick’s Day, the annual celebration of all things Irish, is being marked in cities across the country on Monday with boisterous parades and celebrations. New York City hosts one of the largest and oldest parades in the United States.

The St. Patrick’s Day parade in New York City will start with damp weather in the presence of clouds on Monday, yet atmospheric conditions will transition toward sunny skies in the later of the day. The combination of rain showers that persisted overnight can lead to weather being cold,

Hundreds of thousands marched up Fifth Avenue and nearly 2 million lined the street for NYC's St. Patrick's Day Parade on Monday.