974  
CDUS46 KSGX 210929  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
229 AM PDT SUN SEP 21 2025  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 20 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 92 3:13 PM 104 2015 90 2 78  
MINIMUM 67 6:25 AM 53 1999 63 4 60  
AVERAGE 80 77 3 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.29 2005 0.00 0.00 T  
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  
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 15 12 3 4  
MONTH TO DATE 297 274 23 297  
SINCE SEP 1 297 274 23 297  
SINCE JAN 1 1686 1647 39 1671    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (240)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 5.0  
 
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 84 5:00 AM  
LOWEST 32 3:00 PM  
AVERAGE 58  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 90 105 2003  
MINIMUM TEMPERATURE (F) 63 53 2007  
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2025.....SUNRISE 6:38 AM PDT SUNSET 6:48 PM PDT  
SEPTEMBER 22 2025.....SUNRISE 6:39 AM PDT SUNSET 6:47 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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