527  
CDUS43 KLOT 220639  
CLIORD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE CHICAGO IL  
139 AM CDT THU MAY 22 2025  
   
...............................
 
 
   
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 21 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 52 4:57 PM 92 1934 72 -20 89  
1977  
MINIMUM 48 8:23 AM 31 2002 52 -4 61  
AVERAGE 50 62 -12 75  
 
PRECIPITATION (IN)  
YESTERDAY 0.06 1.96 2018 0.15 -0.09 0.00  
MONTH TO DATE 1.01 3.11 -2.10 3.05  
SINCE MAR 1 6.66 9.31 -2.65 10.11  
SINCE JAN 1 9.16 13.27 -4.11 14.26  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1969 0.0 0.0 0.0  
2004  
MONTH TO DATE T 0.0 0.0 0.0  
SINCE MAR 1 2.8 6.8 -4.0 1.0  
SINCE JUL 1 17.6 38.4 -20.8 22.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 15 5 10 0  
MONTH TO DATE 162 157 5 54  
SINCE MAR 1 1220 1433 -213 1067  
SINCE JUL 1 5355 5902 -547 4755  
 
COOLING  
YESTERDAY 0 2 -2 10  
MONTH TO DATE 26 30 -4 51  
SINCE MAR 1 34 40 -6 60  
SINCE JAN 1 34 40 -6 60    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 9.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 12:00 AM  
LOWEST 83 2:00 PM  
AVERAGE 90  
   
......................................................
 
 
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 94 1925  
MINIMUM TEMPERATURE (F) 53 36 2006  
 
SUNRISE AND SUNSET  
MAY 22 2025...........SUNRISE 5:25 AM CDT SUNSET 8:12 PM CDT  
MAY 23 2025...........SUNRISE 5:24 AM CDT SUNSET 8:13 PM CDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab IL Page
The Nexlab IN Page Main Text Page