426  
CDUS43 KLOT 270636  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
136 AM CDT THU APR 27 2017  
 
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 26 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 74 153 PM 89 1986 63 11 68  
MINIMUM 60 1101 PM 27 2006 42 18 42  
AVERAGE 67 53 14 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.22 1.76 1995 0.12 0.10 0.00  
MONTH TO DATE 3.02 2.90 0.12 1.26  
SINCE MAR 1 7.03 5.40 1.63 4.60  
SINCE JAN 1 11.42 8.92 2.50 6.67  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.8 1910 0.0 0.0 0.0  
MONTH TO DATE 0.0 1.2 -1.2 1.1  
SINCE MAR 1 7.8 6.8 1.0 3.7  
SINCE JUL 1 26.1 36.3 -10.2 31.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 13 -13 10  
MONTH TO DATE 269 446 -177 440  
SINCE MAR 1 1054 1287 -233 1105  
SINCE JUL 1 4979 6021 -1042 5113  
 
COOLING  
YESTERDAY 2 0 2 0  
MONTH TO DATE 12 0 12 7  
SINCE MAR 1 12 1 11 7  
SINCE JAN 1 12 1 11 7    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 11.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 1100 PM  
LOWEST 57 1100 AM  
AVERAGE 74  
   
......................................................
 
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 64 87 1986  
MINIMUM TEMPERATURE (F) 43 29 1945  
 
 
SUNRISE AND SUNSET  
APRIL 27 2017.........SUNRISE 553 AM CDT SUNSET 746 PM CDT  
APRIL 28 2017.........SUNRISE 551 AM CDT SUNSET 747 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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