871  
CXUS53 KFSD 011613 RRA  
CLMSUX  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
953 AM CST FRI JAN 01 2021  
   
...............................
 
 
...THE SIOUX CITY IA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2020...  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1889 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 -28 12/29/1917  
HIGHEST 58 12/08 MM MM 50 12/07  
12/21  
12/22  
LOWEST -5 12/24 MM MM 1 12/16  
AVG. MAXIMUM 39.6 32.1 7.5 35.7  
AVG. MINIMUM 15.4 13.0 2.4 18.5  
MEAN 27.5 22.6 4.9 27.1  
DAYS MAX >= 90 0 0.0 0.0 MM  
DAYS MAX <= 32 9 14.3 -5.3 MM  
DAYS MIN <= 32 31 30.0 1.0 30  
DAYS MIN <= 0 2 4.7 -2.7 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 2.87 1911  
MINIMUM 0.01 1943  
TOTALS 0.51 0.80 -0.29 1.96  
DAILY AVG. 0.02 0.03 -0.01 0.06  
DAYS >= .01 4 6.9 -2.9 5  
DAYS >= .10 2 2.4 -0.4 2  
DAYS >= .50 0 0.3 -0.3 1  
DAYS >= 1.00 0 0.0 0.0 1  
GREATEST  
24 HR. TOTAL 0.26 12/29 TO 12/29  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 34.0 2009  
TOTALS 7.4 7.8 -0.4 2.7  
SINCE 7/1 14.6 13.2 1.4 MM  
SNOWDEPTH AVG. 1 0  
DAYS >= 1.0 2 2.5 -0.5 2  
GREATEST  
SNOW DEPTH 4 12/30 2 12/16  
12/31  
12/17  
24 HR TOTAL 4.0 12/29 TO 12/29  
 
DEGREE DAYS  
HEATING TOTAL 1155 1316 -161 1170  
SINCE 7/1 2623 2793 -170 MM  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 1062 869 193 MM    
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 9.7  
HIGHEST WIND SPEED/DIRECTION 46/320 DATE 12/23  
HIGHEST GUST SPEED/DIRECTION 67/330 DATE 12/23  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.27  
NUMBER OF DAYS FAIR 20  
NUMBER OF DAYS PC 6  
NUMBER OF DAYS CLOUDY 5  
 
AVERAGE RH (PERCENT) 70  
 
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 0 HAIL 0  
HEAVY SNOW 2 SNOW 2  
LIGHT SNOW 4 SLEET 0  
FOG 13 FOG W/VIS <= 1/4 MILE 4  
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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