173  
CDUS46 KSGX 300918  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
218 AM PDT TUE SEP 30 2025  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 29 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 84 2:21 PM 104 2020 87 -3 90  
MINIMUM 62 6:12 AM 53 1998 61 1 57  
AVERAGE 73 74 -1 74  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2019 0.01 -0.01 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  
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 9 -1 9  
MONTH TO DATE 393 368 25 371  
SINCE SEP 1 393 368 25 371  
SINCE JAN 1 1782 1741 41 1745    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (240)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 6.1  
 
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 6:00 AM  
LOWEST 44 3:00 PM  
AVERAGE 64  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 108 2020  
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.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab CA Page Main Text Page