095  
CXUS51 KILN 011418  
CLMDAY  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE WILMINGTON OH  
911 AM EST MON JAN 1 2018  
   
...............................
 
 
   
..THE DAYTON CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1869 TO 2017  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 72 12/06/1998  
12/02/1982  
LOW -20 12/22/1989  
HIGHEST 60 12/04 39 21 66 12/26  
LOWEST -5 12/31 24 -29 1 12/15  
AVG. MAXIMUM 36.5 38.1 -1.6 36.6  
AVG. MINIMUM 21.2 24.3 -3.1 24.0  
MEAN 28.8 31.2 -2.4 30.3  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 12 9.6 2.4 9  
DAYS MIN <= 32 26 23.6 2.4 26  
DAYS MIN <= 0 3 0.9 2.1 0  
 
PRECIPITATION (INCHES)  
TOTALS 1.54 3.12 -1.58 2.99  
DAILY AVG. 0.05 0.10 -0.05 0.10  
DAYS >= .01 12 12.4 -0.4 12  
DAYS >= .10 3 6.5 -3.5 7  
DAYS >= .50 1 2.1 -1.1 2  
DAYS >= 1.00 0 0.6 -0.6 1  
GREATEST  
24 HR. TOTAL 0.71 12/23 TO 12/23 12/16 TO 12/17  
12/13 TO 12/13  
12/13 TO 12/13  
STORM TOTAL MM MM  
(MM/DD(HH)) MM 12/17(00) TO 12/17(00)  
12/13(00) TO 12/13(00)3  
12/13(00) TO 12/13(00)3  
 
SNOWFALL (INCHES)  
TOTALS 8.6 4.5 4.1 4.1  
SINCE 7/1 8.6 5.5 3.1 4.1  
DAYS >= TRACE 12 4.6 7.4 9  
DAYS >= 1.0 3 1.2 1.8 1  
GREATEST  
24 HR TOTAL 3.3 12/29 TO 12/29 12/13 TO 12/13  
12/13 TO 12/13  
12/13 TO 12/13  
STORM TOTAL MM MM  
(MM/DD(HH)) MM 12/13(00) TO 12/13(00)  
12/13(00) TO 12/13(00)3  
12/13(00) TO 12/13(00)3  
 
DEGREE_DAYS  
HEATING TOTAL 1113 1048 65 1068  
SINCE 7/1 2120 2159 -39 1841  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 899 891 8 1247    
................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 10.3  
RESULTANT WIND SPEED/DIRECTION 6/244  
HIGHEST WIND SPEED/DIRECTION 38/280 DATE 12/13  
HIGHEST GUST SPEED/DIRECTION 47/290 DATE 12/13  
 
SKY COVER  
AVERAGE SKY COVER 0.70  
 
AVERAGE RH (PERCENT) 77  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 1  
LIGHT RAIN 6 FREEZING RAIN 0  
LT FREEZING RAIN 1 HAIL 0  
HEAVY SNOW 1 SNOW 2  
LIGHT SNOW 12 SLEET 2  
FOG 17 FOG W/VIS <= 1/4 MILE 1  
HAZE 6  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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