991  
CDUS43 KLOT 212133  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
433 PM CDT FRI MAR 21 2025  
   
...............................  
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR MARCH 21 2025  
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 60 2:48 PM 87 2012 49 11 41  
MINIMUM 31 1:50 AM 9 1885 33 -2 27  
1888  
AVERAGE 46 41 5 34  
 
PRECIPITATION (IN)  
TODAY 0.00 1.07 2007 0.08 -0.08 0.00  
MONTH TO DATE 2.58 1.62 0.96 2.16  
SINCE MAR 1 2.58 1.62 0.96 2.16  
SINCE JAN 1 5.08 5.58 -0.50 6.31  
 
SNOWFALL (IN)  
TODAY 0.0 8.5 1992 0.1 -0.1 0.0  
MONTH TO DATE 2.8 4.5 -1.7 T  
SINCE MAR 1 2.8 4.5 -1.7 T  
SINCE JUL 1 17.6 36.1 -18.5 21.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 19 24 -5 31  
MONTH TO DATE 459 583 -124 416  
SINCE MAR 1 459 583 -124 416  
SINCE JUL 1 4594 5052 -458 4104  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 47 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 14.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 12:00 AM  
LOWEST 33 3:00 PM  
AVERAGE 54  
   
......................................................  
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 83 2012  
MINIMUM TEMPERATURE (F) 33 -1 1888  
 
SUNRISE AND SUNSET  
MARCH 21 2025.........SUNRISE 6:53 AM CDT SUNSET 7:05 PM CDT  
MARCH 22 2025.........SUNRISE 6:51 AM CDT SUNSET 7:06 PM CDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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