Historic data

Detailed almanac search form
O'Hare daily summary
O'Hare monthly summary
O'Hare seasonal summary
O'Hare annual summary
Regional temp and precipitation
Illinois temp and precipitation
Data and records for Chicago and Rockford

NORMALS AND RECORDS
Chicago daily normals
Chicago official records
Chicago records by date
Record reports from O'Hare
Chicago hourly weather history

WINTERS
Chicago winters
Chicago monthly snow amounts
Chicago seasonal snowfall totals

OTHER
Frost and planting dates
Local holiday statistics
Sunrise and sunset
Moon phases
Chicago climate plots

Weather history in photos