259  
CDUS46 KSGX 200027  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
527 PM PDT FRI SEP 19 2025  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 19 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 89 2:43 PM 100 2015 91 -2 75  
MINIMUM 71 6:06 AM 56 2005 64 7 61  
AVERAGE 80 77 3 68  
 
PRECIPITATION (IN)  
TODAY 0.00 T 2016 0.00 0.00 0.00  
MONTH TO DATE 0.09 0.05 0.04 T  
SINCE JUL 1 0.09 0.13 -0.04 T  
SINCE OCT 1 6.31 11.59 -5.28 17.64  
SINCE JAN 1 6.16 8.49 -2.33 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 15 12 3 3  
MONTH TO DATE 282 262 20 293  
SINCE SEP 1 282 262 20 293  
SINCE JAN 1 1671 1635 36 1667    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (260)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 4.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 7:00 AM  
LOWEST 40 2:00 PM  
AVERAGE 58  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 90 104 2015  
MINIMUM TEMPERATURE (F) 63 53 1999  
 
SUNRISE AND SUNSET  
SEPTEMBER 19 2025.....SUNRISE 6:37 AM PDT SUNSET 6:51 PM PDT  
SEPTEMBER 20 2025.....SUNRISE 6:37 AM PDT SUNSET 6:49 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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