179  
CDUS46 KMTR 220841  
CLILVK  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
141 AM PDT MON SEP 22 2025  
   
...............................
 
 
   
..THE LIVERMORE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1930 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 87 3:03 PM 104 1943 85 2 90  
MINIMUM 59 6:18 AM 40 1960 54 5 56  
AVERAGE 73 70 3 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.46 2013 0.01 -0.01 0.00  
MONTH TO DATE 0.03 0.04 -0.01 0.01  
SINCE OCT 1 8.71 15.14 -6.43 14.24  
SINCE JAN 1 4.52 9.91 -5.39 11.05  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 0 1 -1 2  
SINCE SEP 1 0 1 -1 2  
SINCE JUL 1 0 8 -8 4  
 
COOLING  
YESTERDAY 8 5 3 8  
MONTH TO DATE 160 130 30 124  
SINCE SEP 1 160 130 30 124  
SINCE JAN 1 747 756 -9 1046    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION W (280)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 4.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 4:00 AM  
LOWEST 36 3:00 PM  
AVERAGE 65  
   
......................................................
 
 
THE LIVERMORE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 106 1949  
MINIMUM TEMPERATURE (F) 54 40 1960  
 
SUNRISE AND SUNSET  
SEPTEMBER 22 2025.....SUNRISE 6:55 AM PDT SUNSET 7:03 PM PDT  
SEPTEMBER 23 2025.....SUNRISE 6:56 AM PDT SUNSET 7:02 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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