St. Patrick's Day Weather History

What's the weather typically like on St. Patrick's Day?

See historical weather for 3/17 going back 55 years to 1970 in cities across America.

What to Expect on St. Patrick's Day

St. Patrick's Day marks the transition from winter to spring across much of the US. March 17th falls just before the spring equinox, and weather can be highly unpredictable. Cities hosting parades may face anything from 70°F sunshine to late-season snowstorms, sometimes within the same week.

The Chicago River dyeing ceremony has taken place in temperatures ranging from the low 20s to the mid-70s over the years.

Planning Tips for St. Patrick's Day

  • Chicago, Boston, and New York parades can face cold winds off the water even on mild days
  • Layer clothing for outdoor events since March temperatures can swing 30+ degrees in a single day
  • Southern cities are typically comfortable in the 60s-70s by mid-March

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