848  
CDUS46 KSGX 280035  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
535 PM PDT SUN JUL 27 2025  
   
...............................  
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR JULY 27 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 87 1:55 PM 102 1998 95 -8 93  
2023  
MINIMUM 59 5:33 AM 57 2012 65 -6 66  
AVERAGE 73 80 -7 80  
 
PRECIPITATION (IN)  
TODAY 0.00 T 2015 0.00 0.00 0.00  
MONTH TO DATE 0.00 0.04 -0.04 0.00  
SINCE JUL 1 0.00 0.04 -0.04 0.00  
SINCE OCT 1 6.22 11.50 -5.28 17.64  
SINCE JAN 1 6.07 8.40 -2.33 16.29  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 0 4 -4 2  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 8 15 -7 15  
MONTH TO DATE 297 382 -85 465  
SINCE JUN 1 585 632 -47 750  
SINCE JAN 1 835 846 -11 811    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 5:00 AM  
LOWEST 33 2:00 PM  
AVERAGE 62  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 95 102 1998  
MINIMUM TEMPERATURE (F) 65 57 2012  
 
SUNRISE AND SUNSET  
JULY 27 2025..........SUNRISE 5:59 AM PDT SUNSET 7:55 PM PDT  
JULY 28 2025..........SUNRISE 5:59 AM PDT SUNSET 7:54 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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