264  
CDUS46 KSGX 190923  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
223 AM PDT FRI SEP 19 2025  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR SEPTEMBER 18 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 86 11:21 AM 106 2016 91 -5 79  
MINIMUM 71 6:40 AM 55 2010 64 7 57  
AVERAGE 79 77 2 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.09R 0.00 MM 0.01 0.08 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  
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 14 12 2 3  
MONTH TO DATE 267 250 17 290  
SINCE SEP 1 267 250 17 290  
SINCE JAN 1 1656 1623 33 1664    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SW (230)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 6.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 84 3:00 AM  
LOWEST 55 10:00 AM  
AVERAGE 70  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 91 100 2015  
MINIMUM TEMPERATURE (F) 64 56 2005  
 
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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