217  
CDUS46 KSGX 220024  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
524 PM PDT SUN SEP 21 2025  
   
...............................  
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 21 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 82 1:45 PM 105 2003 90 -8 79  
MINIMUM 65 5:44 AM 53 2007 63 2 58  
AVERAGE 74 76 -2 69  
 
PRECIPITATION (IN)  
TODAY 0.00 0.00 2004 0.01 -0.01 0.00  
2005  
2006  
MONTH TO DATE 0.09 0.06 0.03 T  
SINCE JUL 1 0.09 0.14 -0.05 T  
SINCE OCT 1 6.31 11.60 -5.29 17.64  
SINCE JAN 1 6.16 8.50 -2.34 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 9 12 -3 4  
MONTH TO DATE 306 286 20 301  
SINCE SEP 1 306 286 20 301  
SINCE JAN 1 1695 1659 36 1675    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 3.3  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 7:00 AM  
LOWEST 49 2:00 PM  
AVERAGE 65  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 90 105 2009  
MINIMUM TEMPERATURE (F) 63 54 2017  
 
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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