031  
CDUS46 KMTR 210041  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
541 PM PDT WED SEP 20 2017  
 
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 2017
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 71 200 PM 93 2015 74 -3 73  
1990  
MINIMUM 60 343 AM 48 1965 56 4 58  
1954  
1947  
AVERAGE 66 65 1 66  
 
PRECIPITATION (IN)  
TODAY 0.00 0.08 2005 0.00 0.00 0.00  
MONTH TO DATE 0.22 0.08 0.14 0.00  
SINCE OCT 1 31.14 20.56 10.58 17.23  
SINCE JAN 1 22.19 13.20 8.99 12.44  
 
SNOWFALL (IN)  
TODAY 0.0 0.0  
MONTH TO DATE 0.0  
SINCE SEP 1 0.0  
SINCE JUL 1 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 2 -2 0  
MONTH TO DATE 1 40 -39 38  
SINCE SEP 1 1 40 -39 38  
SINCE JUL 1 61 153 -92 141  
 
COOLING  
TODAY 1 1 0 1  
MONTH TO DATE 129 35 94 28  
SINCE SEP 1 129 35 94 28  
SINCE JAN 1 261 132 129 93    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION W (270)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 11.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 600 AM  
LOWEST 64 1200 AM  
AVERAGE 77  
   
......................................................
 
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 95 2003  
MINIMUM TEMPERATURE (F) 56 45 1955  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2017.....SUNRISE 656 AM PDT SUNSET 709 PM PDT  
SEPTEMBER 21 2017.....SUNRISE 657 AM PDT SUNSET 707 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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