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Weather conditions on bar directly above are near Lakefront. Tabs under Moon Phases refer to O'Hare (official).

Archives for SPC Convective outlook are updated daily with a live map a the beginning of the article. Touch or click map to get possible update, and follow link at end of article for referral to NOAA/NWS Storm Prediction Center. Archives for Chicago's hourly weather data were updated 24-48 hours after end of each day prior to Dec. 2020.

Friday, April 30, 2010

APRIL CHICAGO NORMALS FOR TEMPERATURE, PRECIPITATION, SNOWFALL (1981-2010)

JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC

Day of MonthHighLowAverageHDDCDDPrecipitationSnowfall
15334442200.100.1
25434442100.110.1
35435442100.100.1
45435452000.110.1
55535452000.100.1
65536452000.100.0
75636461900.110.1
85636461900.110.0
95637461900.120.1
105737471800.110.0
115737471800.120.1
125838481800.110.0
135838481700.110.1
145838481700.110.0
155939491700.120.1
165939491600.110.0
176039501600.120.0
186040501600.110.1
196140501500.120.0
206140511500.110.0
216141511500.110.0
226241511400.120.0
236241521400.110.1
246342521300.110.0
256342521300.120.0
266342531300.120.0
276443531200.120.0
286443541200.120.0
296443541200.120.0
306544541100.120.0
MONTH5938.848.949293.381.2







HDD = A Heating Degree Day represents the number of degree(s) that the mean temperature for the day is below 65 degrees during a day.

CDD = A Cooling Degree Day represents the number of degree(s) that the mean temperature for the day is above 65 degrees during a day.







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