214  
CDUS43 KLOT 240634  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
1232 AM CST WED JAN 24 2018  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 23 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 39 1221 AM 65 1909 31 8 42  
MINIMUM 28 1159 PM -18 1963 16 12 36  
AVERAGE 34 24 10 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.07 0.89 1999 0.05 0.02 0.00  
MONTH TO DATE 1.51 1.33 0.18 2.74  
SINCE DEC 1 2.10 3.58 -1.48 4.51  
SINCE JAN 1 1.51 1.33 0.18 2.74  
 
SNOWFALL (IN)  
YESTERDAY 0.5 4.5 1897 0.4 0.1 0.0  
MONTH TO DATE 4.3 7.9 -3.6 0.4  
SINCE DEC 1 9.6 16.1 -6.5 18.1  
SINCE JUL 1 9.7 17.5 -7.8 18.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 41 -10 26  
MONTH TO DATE 991 951 40 846  
SINCE DEC 1 2156 2106 50 2077  
SINCE JUL 1 3199 3362 -163 2906  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 12.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
LIGHT SNOW  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 89 400 AM  
LOWEST 69 200 PM  
AVERAGE 79  
   
......................................................
 
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 31 65 1967  
MINIMUM TEMPERATURE (F) 16 -15 1897  
 
 
SUNRISE AND SUNSET  
JANUARY 24 2018.......SUNRISE 711 AM CST SUNSET 456 PM CST  
JANUARY 25 2018.......SUNRISE 711 AM CST SUNSET 458 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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