719  
CDUS46 KSGX 240024  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
524 PM PDT FRI MAY 23 2025  
   
...............................  
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 23 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 83 2:02 PM 97 2001 81 2 69  
MINIMUM 59 4:32 AM 50 2010 57 2 55  
AVERAGE 71 68 3 62  
 
PRECIPITATION (IN)  
TODAY 0.00 0.19 2008 0.00 0.00 0.00  
MONTH TO DATE 0.25 0.26 -0.01 0.15  
SINCE JUL 1 6.12 11.58 -5.46 19.80  
SINCE OCT 1 6.12 11.40 -5.28 17.64  
SINCE JAN 1 5.97 8.30 -2.33 16.29  
 
DEGREE DAYS  
HEATING  
TODAY 0 1 -1 3  
MONTH TO DATE 32 32 0 28  
SINCE MAR 1 376 309 67 418  
SINCE JUL 1 1134 1283 -149 1306  
 
COOLING  
TODAY 6 4 2 0  
MONTH TO DATE 118 82 36 21  
SINCE MAR 1 175 162 13 46  
SINCE JAN 1 194 175 19 46    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (240)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 6.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 3:00 AM  
LOWEST 33 1:00 PM  
AVERAGE 63  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 97 2021  
MINIMUM TEMPERATURE (F) 57 48 2010  
 
SUNRISE AND SUNSET  
MAY 23 2025...........SUNRISE 5:44 AM PDT SUNSET 7:51 PM PDT  
MAY 24 2025...........SUNRISE 5:43 AM PDT SUNSET 7:52 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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