640  
CDUS43 KDMX 220733  
CLIMCW  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DES MOINES IA  
232 AM CDT FRI SEP 22 2017  
   
...............................
 
 
   
..THE MASON CITY IA CLIMATE SUMMARY FOR SEPTEMBER 21 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1893 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 89 353 PM 93 1937 71 18 86  
MINIMUM 48 428 AM 29 1999 46 2 66  
AVERAGE 69 59 10 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.40 1980 0.11 -0.11 0.63  
MONTH TO DATE 1.99 2.34 -0.35 6.75  
SINCE SEP 1 1.99 2.34 -0.35 6.75  
SINCE JAN 1 24.91 28.70 -3.79 38.01  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2002 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 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 0 7 -7 0  
MONTH TO DATE 46 92 -46 24  
SINCE SEP 1 46 92 -46 24  
SINCE JUL 1 69 128 -59 42  
 
COOLING  
YESTERDAY 4 1 3 11  
MONTH TO DATE 54 46 8 72  
SINCE SEP 1 54 46 8 72  
SINCE JAN 1 553 602 -49 680    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION S (170)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 11.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 100 AM  
LOWEST 47 300 PM  
AVERAGE 72  
   
......................................................
 
 
 
THE MASON CITY IA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 94 1937  
MINIMUM TEMPERATURE (F) 46 25 1913  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 22 2017.....SUNRISE 701 AM CDT SUNSET 710 PM CDT  
SEPTEMBER 23 2017.....SUNRISE 702 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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