422  
CDUS46 KSGX 250923  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
223 AM PDT SUN MAY 25 2025  
   
...............................
 
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 24 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 77 3:35 PM 97 2021 81 -4 68  
MINIMUM 58 11:59 PM 48 2010 57 1 56  
AVERAGE 68 69 -1 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2018 0.01 -0.01 T  
2023  
2024  
MONTH TO DATE 0.25 0.27 -0.02 0.15  
SINCE JUL 1 6.12 11.59 -5.47 19.80  
SINCE OCT 1 6.12 11.41 -5.29 17.64  
SINCE JAN 1 5.97 8.31 -2.34 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 3  
MONTH TO DATE 32 33 -1 31  
SINCE MAR 1 376 310 66 421  
SINCE JUL 1 1134 1284 -150 1309  
 
COOLING  
YESTERDAY 3 4 -1 0  
MONTH TO DATE 121 86 35 21  
SINCE MAR 1 178 166 12 46  
SINCE JAN 1 197 179 18 46    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION W (250)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 7.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 84 11:00 PM  
LOWEST 42 1:00 PM  
AVERAGE 63  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 92 2020  
2021  
MINIMUM TEMPERATURE (F) 57 48 2010  
 
SUNRISE AND SUNSET  
MAY 25 2025...........SUNRISE 5:43 AM PDT SUNSET 7:53 PM PDT  
MAY 26 2025...........SUNRISE 5:42 AM PDT SUNSET 7:53 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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