664  
CDUS43 KGRR 111428  
CLIGRR  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI  
926 AM EST MON DEC 11 2017  
 
   
...............................
 
 
   
..THE GRAND RAPIDS MI CLIMATE SUMMARY FOR DECEMBER 11 2017
 
 
VALID AS OF 0900 AM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1892 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 45 853 AM 63 1949 36 9 30  
MINIMUM 23 824 AM -3 1962 25 -2 22  
AVERAGE 34 30 4 26  
 
PRECIPITATION (IN)  
TODAY T 1.12 1899 0.09 -0.09 0.76  
MONTH TO DATE 0.34 0.98 -0.64 1.61  
SINCE DEC 1 0.34 0.98 -0.64 1.61  
SINCE JAN 1 37.81 36.75 1.06 44.94  
 
SNOWFALL (IN)  
TODAY T 14.2 2000 0.7 -0.7 8.9  
MONTH TO DATE 4.7 6.4 -1.7 23.6  
SINCE DEC 1 4.7 6.4 -1.7 23.6  
SINCE JUL 1 5.3 13.7 -8.4 24.4  
SNOW DEPTH 2  
 
DEGREE DAYS  
HEATING  
TODAY 31 35 -4 39  
MONTH TO DATE 334 362 -28 372  
SINCE DEC 1 334 362 -28 372  
SINCE JUL 1 1525 1700 -175 1320  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 719 699 20 936    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION E (90)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 5.5  
 
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
SNOW  
LIGHT SNOW  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 900 AM  
LOWEST 81 1200 AM  
AVERAGE 87  
   
......................................................
 
 
 
THE GRAND RAPIDS MI CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 36 60 1991  
1949  
1899  
MINIMUM TEMPERATURE (F) 25 -5 1958  
 
 
SUNRISE AND SUNSET  
DECEMBER 11 2017......SUNRISE 803 AM EST SUNSET 508 PM EST  
DECEMBER 12 2017......SUNRISE 804 AM EST SUNSET 508 PM EST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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