540  
CDUS46 KMTR 180826  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
126 AM PDT SAT AUG 18 2018  
 
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 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 71 205 PM 82 1993 73 -2 72  
1988  
MINIMUM 55 1159 PM 48 1952 56 -1 60  
1945  
AVERAGE 63 64 -1 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.03 1976 0.00 0.00 0.00  
MONTH TO DATE 0.00 0.02 -0.02 T  
SINCE OCT 1 13.86 20.46 -6.60 30.92  
SINCE JAN 1 10.81 13.10 -2.29 21.97  
 
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 2 1 1 0  
MONTH TO DATE 44 28 16 6  
SINCE JUN 1 146 198 -52 128  
SINCE JUL 1 97 93 4 52  
 
COOLING  
YESTERDAY 0 1 -1 1  
MONTH TO DATE 2 17 -15 27  
SINCE JUN 1 21 62 -41 84  
SINCE JAN 1 32 81 -49 107    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION NW (300)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 12.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 300 AM  
LOWEST 53 200 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 85 1978  
MINIMUM TEMPERATURE (F) 56 48 1957  
 
 
SUNRISE AND SUNSET  
AUGUST 18 2018........SUNRISE 628 AM PDT SUNSET 758 PM PDT  
AUGUST 19 2018........SUNRISE 629 AM PDT SUNSET 757 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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