527  
CDUS46 KSGX 010025  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
525 PM PDT TUE SEP 30 2025  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 30 2025...  
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 80 3:18 PM 108 2020 87 -7 98  
MINIMUM 64 12:38 AM 52 2019 61 3 61  
AVERAGE 72 74 -2 80  
 
PRECIPITATION (IN)  
TODAY 0.00 T 2011 0.00 0.00 0.00  
2023  
MONTH TO DATE 0.12 0.10 0.02 T  
SINCE JUL 1 0.12 0.18 -0.06 T  
SINCE OCT 1 6.34 11.64 -5.30 17.64  
SINCE JAN 1 6.19 8.54 -2.35 16.29  
 
DEGREE DAYS  
HEATING  
TODAY 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  
TODAY 7 9 -2 15  
MONTH TO DATE 400 378 22 386  
SINCE SEP 1 400 378 22 386  
SINCE JAN 1 1789 1751 38 1760    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION W (260)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 5.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 5:00 AM  
LOWEST 38 2:00 PM  
AVERAGE 58  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 107 2012  
MINIMUM TEMPERATURE (F) 61 52 2019  
 
SUNRISE AND SUNSET  
SEPTEMBER 30 2025.....SUNRISE 6:44 AM PDT SUNSET 6:36 PM PDT  
OCTOBER 1 2025.......SUNRISE 6:45 AM PDT SUNSET 6:34 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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