329  
CDUS46 KMTR 010840  
CLISFO  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
140 AM PDT TUE AUG 01 2023  
   
...............................
 
 
   
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR JULY 31 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1927 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 70 12:01 PM 97 1993 73 -3 72  
MINIMUM 57 4:38 AM 49 1953 56 1 60  
1954  
1956  
AVERAGE 64 64 0 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.02 1949 0.00 0.00 0.00  
MONTH TO DATE T 0.00 0.00 0.00  
SINCE OCT 1 31.39 19.53 11.86 18.17  
SINCE JAN 1 20.14 12.56 7.58 1.89  
 
SNOWFALL (IN)  
YESTERDAY MM 0.0  
MONTH TO DATE MM  
SINCE JUN 1 MM  
SINCE JUL 1 MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 2 -1 0  
MONTH TO DATE 41 62 -21 57  
SINCE JUN 1 119 159 -40 116  
SINCE JUL 1 41 62 -21 57  
 
COOLING  
YESTERDAY 0 1 -1 1  
MONTH TO DATE 22 26 -4 19  
SINCE JUN 1 23 49 -26 64  
SINCE JAN 1 28 69 -41 84    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION NW (300)  
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 12.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 12:00 AM  
LOWEST 59 12:00 PM  
AVERAGE 73  
   
......................................................
 
 
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 89 1975  
MINIMUM TEMPERATURE (F) 56 48 1951  
 
SUNRISE AND SUNSET  
AUGUST 1 2023........SUNRISE 6:13 AM PDT SUNSET 8:18 PM PDT  
AUGUST 2 2023........SUNRISE 6:14 AM PDT SUNSET 8:17 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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