178  
CDUS43 KDMX 170647  
CLIMCW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DES MOINES IA  
1247 AM CST SUN DEC 17 2023  
   
...............................
 
 
   
..THE MASON CITY IA CLIMATE SUMMARY FOR DECEMBER 16 2023
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1893 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 41 102 PM 61 1939 29 12 24  
MINIMUM 35 1159 PM -21 1932 13 22 18  
AVERAGE 38 21 17 21  
 
PRECIPITATION (IN)  
YESTERDAY 0.11 0.50 1908 0.04 0.07 0.05  
MONTH TO DATE 0.11 0.70 -0.59 0.78  
SINCE DEC 1 0.11 0.70 -0.59 0.78  
SINCE JAN 1 24.40 35.66 -11.26 28.54  
 
SNOWFALL (IN)  
YESTERDAY MM 5.0 1940 0.3 MM 1.2  
MONTH TO DATE T 4.3 -4.3 7.7  
SINCE DEC 1 T 4.3 -4.3 7.7  
SINCE JUL 1 1.9 7.7 -5.8 11.7  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 44 -17 44  
MONTH TO DATE 558 655 -97 621  
SINCE DEC 1 558 655 -97 621  
SINCE JUL 1 1940 2312 -372 2233  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 743 602 141 675    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 5.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 800 AM  
LOWEST 89 600 AM  
AVERAGE 95  
   
......................................................
 
 
THE MASON CITY IA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 29 57 1939  
MINIMUM TEMPERATURE (F) 13 -18 1983  
 
SUNRISE AND SUNSET  
DECEMBER 17 2023......SUNRISE 739 AM CST SUNSET 439 PM CST  
DECEMBER 18 2023......SUNRISE 740 AM CST SUNSET 440 PM CST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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