677  
CDUS43 KDVN 180646  
CLIIOW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE QUAD CITIES IA IL  
146 AM CDT THU SEP 18 2025  
   
...............................  
 
   
..THE IOWA CITY IA CLIMATE SUMMARY FOR SEPTEMBER 17 2025  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 9999 TO 9999  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 91 155 PM MM MM 77 14 88  
MINIMUM 62 520 AM MM MM 54 8 59  
AVERAGE 77 66 11 74  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 MM MM 0.11 -0.11 0.00  
MONTH TO DATE 0.04 1.91 -1.87 0.00  
SINCE SEP 1 0.04 1.91 -1.87 0.00  
SINCE JAN 1 21.55 27.75 -6.20 31.87  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 37 26 11 16  
SINCE SEP 1 37 26 11 16  
SINCE JUL 1 48 32 16 21  
 
COOLING  
YESTERDAY 12 3 9 9  
MONTH TO DATE 104 80 24 68  
SINCE SEP 1 104 80 24 68  
SINCE JAN 1 1116 999 117 992    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 4.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 100 AM  
LOWEST 35 100 PM  
AVERAGE 61  
   
......................................................  
 
THE IOWA CITY IA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 MM MM  
MINIMUM TEMPERATURE (F) 53 MM MM  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 650 AM CDT SUNSET 710 PM CDT  
SEPTEMBER 19 2025.....SUNRISE 651 AM CDT SUNSET 708 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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