374  
CDUS46 KSGX 280925  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
225 AM PDT SUN SEP 28 2025  
   
...............................  
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 27 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 78 2:50 PM 112 2010 88 -10 85  
MINIMUM 64 11:59 PM 51 2013 62 2 59  
AVERAGE 71 75 -4 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.03R 0.00 MM 0.00 0.03 0.00  
MONTH TO DATE 0.12 0.08 0.04 T  
SINCE JUL 1 0.12 0.16 -0.04 T  
SINCE OCT 1 6.34 11.62 -5.28 17.64  
SINCE JAN 1 6.19 8.52 -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 6 10 -4 7  
MONTH TO DATE 377 349 28 353  
SINCE SEP 1 377 349 28 353  
SINCE JAN 1 1766 1722 44 1727    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 6.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 2:00 AM  
LOWEST 54 2:00 PM  
AVERAGE 71  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 100 1999  
2022  
MINIMUM TEMPERATURE (F) 62 52 1998  
 
SUNRISE AND SUNSET  
SEPTEMBER 28 2025.....SUNRISE 6:43 AM PDT SUNSET 6:38 PM PDT  
SEPTEMBER 29 2025.....SUNRISE 6:44 AM PDT SUNSET 6:37 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