596  
CDUS41 KGYX 180910  
CLIPWM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GRAY ME  
410 AM EST FRI DEC 18 2020  
   
...............................
 
 
   
..THE PORTLAND ME CLIMATE SUMMARY FOR DECEMBER 17 2020
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1941 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 21 11:59 PM 57 1984 37 -16 32  
MINIMUM 12 8:29 AM -12 1942 20 -8 24  
AVERAGE 17 28 -11 28  
 
PRECIPITATION (IN)  
YESTERDAY 0.86 2.88 1973 0.13 0.73 0.23  
MONTH TO DATE 3.50 2.33 1.17 6.08  
SINCE DEC 1 3.50 2.33 1.17 6.08  
SINCE JAN 1 39.76 45.56 -5.80 50.00  
 
SNOWFALL (IN)  
YESTERDAY 17.6 22.3 1970 0.5 17.1 2.5  
MONTH TO DATE 19.3 6.0 13.3 12.7  
SINCE DEC 1 19.3 6.0 13.3 12.7  
SINCE JUL 1 19.4 7.9 11.5 13.0  
SNOW DEPTH 3  
 
DEGREE DAYS  
HEATING  
YESTERDAY 48 37 11 37  
MONTH TO DATE 556 573 -17 554  
SINCE DEC 1 556 573 -17 554  
SINCE JUL 1 1823 2064 -241 1989  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 681 359 322 474    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 16 RESULTANT WIND DIRECTION N (10)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 76 HIGHEST GUST DIRECTION E (80)  
AVERAGE WIND SPEED 16.5  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY SNOW  
SNOW  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
BLOWING SNOW  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 1:00 PM  
LOWEST 51 1:00 AM  
AVERAGE 72  
   
......................................................
 
 
THE PORTLAND ME CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 37 53 1996  
MINIMUM TEMPERATURE (F) 20 -9 1963  
 
SUNRISE AND SUNSET  
DECEMBER 18 2020......SUNRISE 7:10 AM EST SUNSET 4:06 PM EST  
DECEMBER 19 2020......SUNRISE 7:11 AM EST SUNSET 4:07 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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