627  
CDUS46 KMTR 180825  
CLILVK  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  
125 AM PDT THU SEP 18 2025  
   
...............................  
 
   
..THE LIVERMORE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 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 99R 3:19 PM 99 1991 85 14 74  
MINIMUM 60 6:05 AM 44 1959 55 5 54  
AVERAGE 80 70 10 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.22 1940 0.00 0.00 0.00  
MONTH TO DATE 0.02 0.02 0.00 T  
SINCE OCT 1 8.70 15.12 -6.42 14.23  
SINCE JAN 1 4.51 9.89 -5.38 11.04  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 1  
MONTH TO DATE 0 0 0 2  
SINCE SEP 1 0 0 0 2  
SINCE JUL 1 0 7 -7 4  
 
COOLING  
YESTERDAY 15 6 9 0  
MONTH TO DATE 128 109 19 104  
SINCE SEP 1 128 109 19 104  
SINCE JAN 1 715 735 -20 1026    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (260)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 3.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 65 3:00 AM  
LOWEST 19 2:00 PM  
AVERAGE 42  
   
......................................................  
 
THE LIVERMORE AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 103 1939  
MINIMUM TEMPERATURE (F) 55 41 1978  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 6:52 AM PDT SUNSET 7:10 PM PDT  
SEPTEMBER 19 2025.....SUNRISE 6:53 AM PDT SUNSET 7:08 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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