126  
CXUS53 KDMX 011312  
CLMALO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DES MOINES IA  
709 AM CST MON JAN 1 2018  
   
...............................
 
 
   
..THE WATERLOO IA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1895 TO 2017  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 67 12/03/2012  
12/05/2001  
12/04/1998  
LOW -29 12/25/2000  
12/10/1919  
HIGHEST 66 12/04 49 17 43 12/26  
LOWEST -17 12/31 -11 -6 -17 12/18  
AVG. MAXIMUM 31.3 30.8 0.5 28.3  
AVG. MINIMUM 12.5 13.5 -1.0 15.9  
MEAN 21.9 22.2 -0.3 22.1  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 16 15.4 0.6 14  
DAYS MIN <= 32 31 29.2 1.8 29  
DAYS MIN <= 0 5 5.7 -0.7 6  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 5.92 2015  
MINIMUM 0.16 1995  
TOTALS 0.46 1.20 -0.74 1.87  
DAILY AVG. 0.01 0.04 -0.03 0.06  
DAYS >= .01 7 8.4 -1.4 8  
DAYS >= .10 2 3.4 -1.4 5  
DAYS >= .50 0 0.5 -0.5 2  
DAYS >= 1.00 0 0.1 -0.1 0  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 34.0 5  
0  
-26215  
TOTALS 7.7 9.9 -2.2 10.5  
SINCE 7/1 7.7 13.3 -5.6 10.5  
SNOWDEPTH AVG. 1 4 -3 2  
DAYS >= 1.0 3 3.1 -0.1 5  
GREATEST  
SNOW DEPTH 5 12/31 5 12/24  
12/30 12/20  
12/19  
24 HR TOTAL 5.0 12/29 TO 12/29  
 
DEGREE_DAYS  
HEATING TOTAL 1330 1328 2 1323  
SINCE 7/1 2721 2811 -90 2312  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 720 799 -79 869    
.............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 10.1  
HIGHEST WIND SPEED/DIRECTION 38/310 DATE 12/13  
HIGHEST GUST SPEED/DIRECTION 50/330 DATE 12/13  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.40  
NUMBER OF DAYS FAIR 15  
NUMBER OF DAYS PC 9  
NUMBER OF DAYS CLOUDY 7  
 
AVERAGE RH (PERCENT) 68  
 
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 0 SNOW 2  
LIGHT SNOW 10 SLEET 0  
FOG 10 FOG W/VIS <= 1/4 MILE 0  
HAZE 10  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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