549  
CDUS43 KLOT 300632  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1232 AM CST SAT DEC 30 2023  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 29 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 40 11:31 AM 63 1984 33 7 59  
MINIMUM 31 11:59 PM -15 1880 21 10 43  
AVERAGE 36 27 9 51  
 
PRECIPITATION (IN)  
YESTERDAY 0.14 0.93 2019 0.06 0.08 0.00  
MONTH TO DATE 2.89 1.98 0.91 2.16  
SINCE DEC 1 2.89 1.98 0.91 2.16  
SINCE JAN 1 33.65 37.73 -4.08 31.99  
 
SNOWFALL (IN)  
YESTERDAY 0.0 5.8 2000 0.3 -0.3 0.0  
MONTH TO DATE 0.3 7.0 -6.7 3.2  
SINCE DEC 1 0.3 7.0 -6.7 3.2  
SINCE JUL 1 3.0 9.0 -6.0 4.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 29 38 -9 14  
MONTH TO DATE 734 993 -259 1048  
SINCE DEC 1 734 993 -259 1048  
SINCE JUL 1 1698 2144 -446 2113  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1145 1003 142 1174    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 9.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 1:00 AM  
LOWEST 85 7:00 PM  
AVERAGE 91  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 33 61 1884  
MINIMUM TEMPERATURE (F) 21 -7 1909  
 
SUNRISE AND SUNSET  
DECEMBER 30 2023......SUNRISE 7:19 AM CST SUNSET 4:29 PM CST  
DECEMBER 31 2023......SUNRISE 7:19 AM CST SUNSET 4:30 PM CST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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