954  
CDUS46 KSGX 290925  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
225 AM PDT MON SEP 29 2025  
   
...............................  
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 28 2025...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 81 3:24 PM 100 1999 87 -6 89  
2022  
MINIMUM 64 12:04 AM 52 1998 62 2 58  
AVERAGE 73 74 -1 74  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2019 0.01 -0.01 0.00  
MONTH TO DATE 0.12 0.09 0.03 T  
SINCE JUL 1 0.12 0.17 -0.05 T  
SINCE OCT 1 6.34 11.63 -5.29 17.64  
SINCE JAN 1 6.19 8.53 -2.34 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 8 10 -2 9  
MONTH TO DATE 385 359 26 362  
SINCE SEP 1 385 359 26 362  
SINCE JAN 1 1774 1732 42 1736    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 5.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 12:00 AM  
LOWEST 47 3:00 PM  
AVERAGE 67  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 104 2020  
MINIMUM TEMPERATURE (F) 61 53 1998  
 
SUNRISE AND SUNSET  
SEPTEMBER 29 2025.....SUNRISE 6:44 AM PDT SUNSET 6:37 PM PDT  
SEPTEMBER 30 2025.....SUNRISE 6:44 AM PDT SUNSET 6:36 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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