554  
CDUS43 KDMX 310639  
CLIMCW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DES MOINES IA  
139 AM CDT SUN AUG 31 2025  
   
...............................  
 
   
..THE MASON CITY IA CLIMATE SUMMARY FOR AUGUST 30 2025  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1893 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 71 322 PM 99 2012 79 -8 78  
MINIMUM 57 1156 PM 30 1915 55 2 57  
AVERAGE 64 67 -3 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.21 1962 0.13 -0.13 0.00  
MONTH TO DATE 4.17 3.67 0.50 1.59  
SINCE JUN 1 21.12 13.49 7.63 12.40  
SINCE JAN 1 31.82 27.19 4.63 28.26  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE JUN 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 2 -1 0  
MONTH TO DATE 27 23 4 18  
SINCE JUN 1 43 72 -29 30  
SINCE JUL 1 30 33 -3 21  
 
COOLING  
YESTERDAY 0 4 -4 3  
MONTH TO DATE 153 146 7 153  
SINCE JUN 1 611 500 111 498  
SINCE JAN 1 638 538 100 515    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 5.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 78 300 PM  
AVERAGE 89  
   
......................................................  
 
THE MASON CITY IA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 94 1948  
MINIMUM TEMPERATURE (F) 54 38 2009  
 
SUNRISE AND SUNSET  
AUGUST 31 2025........SUNRISE 637 AM CDT SUNSET 749 PM CDT  
SEPTEMBER 1 2025.....SUNRISE 638 AM CDT SUNSET 748 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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