644  
CDUS46 KMTR 200826  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
126 AM PDT THU JUL 20 2017  
 
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR JULY 19 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1927 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 70 235 PM 90 1961 72 -2 69  
MINIMUM 54 527 AM 49 1981 56 -2 55  
AVERAGE 62 64 -2 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.00 2006 0.00 0.00 0.00  
MONTH TO DATE 0.00 0.00 0.00 T  
SINCE OCT 1 30.92 20.44 10.48 17.23  
SINCE JAN 1 21.97 13.08 8.89 12.44  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0  
MONTH TO DATE 0.0  
SINCE JUN 1 0.0  
SINCE JUL 1 0.0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 3 2 1 3  
MONTH TO DATE 30 38 -8 41  
SINCE JUN 1 106 143 -37 102  
SINCE JUL 1 30 38 -8 41  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 20 19 1 1  
SINCE JUN 1 47 40 7 20  
SINCE JAN 1 70 59 11 51    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 14 RESULTANT WIND DIRECTION W (280)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 15.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 89 500 AM  
LOWEST 47 200 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 93 1996  
MINIMUM TEMPERATURE (F) 56 49 1981  
 
 
SUNRISE AND SUNSET  
JULY 20 2017..........SUNRISE 604 AM PDT SUNSET 827 PM PDT  
JULY 21 2017..........SUNRISE 605 AM PDT SUNSET 827 PM PDT  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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