043  
CDUS43 KLOT 170647  
CLIMDW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
147 AM CDT SAT MAY 17 2025  
   
...............................  
 
   
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR MAY 16 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1928 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 89 3:50 PM 94 1962 71 18 76  
MINIMUM 63 MM 35 1940 52 11 52  
AVERAGE 76 62 14 64  
 
PRECIPITATION (IN)  
YESTERDAY T 1.38 1974 0.12 -0.12 0.19  
MONTH TO DATE 0.60 2.12 -1.52 3.35  
SINCE MAR 1 7.18 7.57 -0.39 11.83  
SINCE JAN 1 8.54 10.51 -1.97 14.81  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 6 -6 1  
MONTH TO DATE 92 119 -27 40  
SINCE MAR 1 1069 1346 -277 985  
SINCE JUL 1 5007 5669 -662 4534  
 
COOLING  
YESTERDAY 11 2 9 0  
MONTH TO DATE 38 24 14 26  
SINCE MAR 1 51 35 16 43  
SINCE JAN 1 51 35 16 43    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 41 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 60 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 16.1  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
SANDSTORM  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 56 4:00 AM  
LOWEST 17 4:00 PM  
AVERAGE 37  
   
......................................................  
 
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 94 1962  
MINIMUM TEMPERATURE (F) 52 36 1929  
1973  
 
SUNRISE AND SUNSET  
MAY 17 2025...........SUNRISE 5:29 AM CDT SUNSET 8:06 PM CDT  
MAY 18 2025...........SUNRISE 5:28 AM CDT SUNSET 8:07 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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