531  
CDUS46 KMTR 180836  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
135 AM PDT THU OCT 18 2018  
 
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1927 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 69 540 AM 90 1988 70 -1 78  
MINIMUM 49 500 AM 42 1971 53 -4 50  
AVERAGE 59 62 -3 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.18 2004 0.04 -0.04 0.00  
MONTH TO DATE 0.16 0.36 -0.20 0.00  
SINCE OCT 1 0.16 0.36 -0.20 0.00  
SINCE JAN 1 10.97 13.65 -2.68 22.19  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0  
MONTH TO DATE 0.0  
SINCE SEP 1 0.0  
SINCE JUL 1 0.0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 4 2 1  
MONTH TO DATE 22 53 -31 19  
SINCE SEP 1 108 106 2 26  
SINCE JUL 1 226 219 7 86  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 17 17 0 18  
SINCE SEP 1 24 61 -37 177  
SINCE JAN 1 60 158 -98 309    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION W (290)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 10.7  
 
 
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 96 100 AM  
LOWEST 55 100 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 86 2012  
MINIMUM TEMPERATURE (F) 53 42 1946  
 
 
SUNRISE AND SUNSET  
OCTOBER 18 2018.......SUNRISE 721 AM PDT SUNSET 628 PM PDT  
OCTOBER 19 2018.......SUNRISE 722 AM PDT SUNSET 627 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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