663  
CDUS43 KLOT 202149  
CLICHI  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
435 PM CDT SUN APR 20 2008  
 
...................................  
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR APRIL 20 2008  
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1971 TO 2000  
CLIMATE RECORD PERIOD 1871 TO 2008  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 72 1220 PM 87 1985 60 12 68  
MINIMUM 44 530 AM 24 1897 39 5 38  
AVERAGE 58 49 9 53  
 
PRECIPITATION (IN)  
TODAY 0.00 2.37 2000 0.13 -0.13 0.00  
MONTH TO DATE 2.01 2.45 -0.44 1.48  
SINCE MAR 1 4.64 5.10 -0.46 5.14  
SINCE JAN 1 10.10 8.48 1.62 8.47  
 
SNOWFALL (IN)  
TODAY 0.0 0.2 1943 T 0.0 0.0  
MONTH TO DATE T 1.6 -1.6 3.0  
SINCE MAR 1 7.9 7.6 0.3 5.3  
SINCE JUL 1 60.3 38.0 22.3 35.6  
 
DEGREE DAYS  
HEATING  
TODAY 7 16 -9 12  
MONTH TO DATE 340 376 -36 460  
SINCE MAR 1 1266 1234 32 1157  
SINCE JUL 1 5957 6080 -123 5839  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 1 -1 6  
SINCE JAN 1 0 1 -1 6    
..............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 4.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 1200 AM  
LOWEST 44 1200 PM  
AVERAGE 65  
 
..........................................................  
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 60 88 1985  
MINIMUM TEMPERATURE (F) 39 27 1986  
 
 
SUNRISE AND SUNSET  
APRIL 20 2008.........SUNRISE 603 AM CDT SUNSET 739 PM CDT  
APRIL 21 2008.........SUNRISE 601 AM CDT SUNSET 740 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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