570  
CDUS46 KSGX 302154  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
254 PM PDT FRI MAY 30 2025  
   
...............................
 
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 28 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 76 MM 103 2003 81 -5 80  
MINIMUM 60 MM 50 2010 57 3 54  
2019  
AVERAGE 68 69 -1 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2022 0.01 -0.01 0.00  
2023  
MONTH TO DATE 0.25 0.29 -0.04 0.15  
SINCE JUL 1 6.12 11.61 -5.49 19.80  
SINCE OCT 1 6.12 11.43 -5.31 17.64  
SINCE JAN 1 5.97 8.33 -2.36 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 32 37 -5 34  
SINCE MAR 1 376 314 62 424  
SINCE JUL 1 1134 1288 -154 1312  
 
COOLING  
YESTERDAY 3 5 -2 2  
MONTH TO DATE 137 104 33 25  
SINCE MAR 1 194 184 10 50  
SINCE JAN 1 213 197 16 50    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED MM RESULTANT WIND DIRECTION MM  
HIGHEST WIND SPEED MM HIGHEST WIND DIRECTION MM  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED MM  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER MM  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST MM  
LOWEST MM  
AVERAGE MM  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 99 2002  
MINIMUM TEMPERATURE (F) 57 49 2010  
 
SUNRISE AND SUNSET  
MAY 29 2025...........SUNRISE 5:41 AM PDT SUNSET 7:55 PM PDT  
MAY 30 2025...........SUNRISE 5:41 AM PDT SUNSET 7:56 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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