936  
CDUS43 KLOT 110632  
CLICHI  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
131 AM CDT SUN MAY 11 2008  
 
...................................  
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 10 2008  
 
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)  
YESTERDAY  
MAXIMUM 61 141 PM 89 1896 68 -7 84  
MINIMUM 38 349 AM 28 1983 45 -7 56  
AVERAGE 50 57 -7 70  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.84 1951 0.11 -0.11 0.00  
MONTH TO DATE 2.04 1.11 0.93 0.13  
SINCE MAR 1 7.39 7.44 -0.05 7.28  
SINCE JAN 1 12.85 10.82 2.03 10.61  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1945 0.0 0.0 0.0  
1907  
1902  
MONTH TO DATE 0.0 T 0.0 0.0  
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  
YESTERDAY 15 9 6 0  
MONTH TO DATE 85 104 -19 41  
SINCE MAR 1 1472 1475 -3 1281  
SINCE JUL 1 6163 6321 -158 5963  
 
COOLING  
YESTERDAY 0 1 -1 5  
MONTH TO DATE 0 10 -10 14  
SINCE MAR 1 0 20 -20 23  
SINCE JAN 1 0 20 -20 23    
..............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 6.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 79 400 AM  
LOWEST 37 1100 AM  
AVERAGE 58  
 
..........................................................  
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 89 1982  
MINIMUM TEMPERATURE (F) 46 33 1981  
 
 
SUNRISE AND SUNSET  
MAY 11 2008...........SUNRISE 535 AM CDT SUNSET 802 PM CDT  
MAY 12 2008...........SUNRISE 534 AM CDT SUNSET 803 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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