877  
CXUS53 KFSD 011600  
CLMHON  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
953 AM CST FRI JAN 01 2021  
   
...............................
 
 
   
..THE HURON CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2020
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1881 TO 2020  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 71 12/06/1939  
LOW -34 12/25/1884  
HIGHEST 60 12/22 MM MM 42 12/07  
12/22  
LOWEST -9 12/24 MM MM -7 12/11  
AVG. MAXIMUM 37.8 29.0 8.8 29.4  
AVG. MINIMUM 14.1 9.5 4.6 13.8  
MEAN 25.9 19.2 6.7 21.6  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 10 17.0 -7.0 20  
DAYS MIN <= 32 31 30.6 0.4 31  
DAYS MIN <= 0 1 7.2 -6.2 3  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 2.15 1931  
MINIMUM T 1986  
TOTALS 0.52 0.52 0.00 1.01  
DAILY AVG. 0.02 0.02 0.00 0.03  
DAYS >= .01 4 5.8 -1.8 7  
DAYS >= .10 2 1.6 0.4 2  
DAYS >= .50 0 0.1 -0.1 1  
DAYS >= 1.00 0 0.0 0.0 0  
GREATEST  
24 HR. TOTAL 0.25 12/29 TO 12/29  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 26.0 2009  
TOTALS 6.8 8.0 -1.2 10.0  
SINCE 7/1 14.1 16.3 -2.2 MM  
SNOWDEPTH AVG. 1 4  
DAYS >= 1.0 2 2.2 -0.2 2  
GREATEST  
SNOW DEPTH 5 12/30 11 12/31  
12/31  
24 HR TOTAL 3.0 12/29 TO 12/29  
 
DEGREE DAYS  
HEATING TOTAL 1204 1418 -214 1336  
SINCE 7/1 2855 3119 -264 MM  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 879 742 137 MM    
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 9.8  
HIGHEST WIND SPEED/DIRECTION 46/350 DATE 12/23  
HIGHEST GUST SPEED/DIRECTION 66/350 DATE 12/23  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.29  
NUMBER OF DAYS FAIR 22  
NUMBER OF DAYS PC 5  
NUMBER OF DAYS CLOUDY 4  
 
AVERAGE RH (PERCENT) 73  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 0  
LIGHT RAIN 0 FREEZING RAIN 0  
LT FREEZING RAIN 1 HAIL 0  
HEAVY SNOW 1 SNOW 2  
LIGHT SNOW 7 SLEET 0  
FOG 11 FOG W/VIS <= 1/4 MILE 3  
HAZE 0  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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