505  
CDUS46 KSGX 302152  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
252 PM PDT FRI MAY 30 2025  
   
...............................
 
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 27 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 84 MM 99 2000 81 3 80  
MINIMUM 60 MM 46 1998 57 3 53  
AVERAGE 72 69 3 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.01 2001 0.00 0.00 0.00  
MONTH TO DATE 0.25 0.28 -0.03 0.15  
SINCE JUL 1 6.12 11.60 -5.48 19.80  
SINCE OCT 1 6.12 11.42 -5.30 17.64  
SINCE JAN 1 5.97 8.32 -2.35 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 32 36 -4 34  
SINCE MAR 1 376 313 63 424  
SINCE JUL 1 1134 1287 -153 1312  
 
COOLING  
YESTERDAY 7 5 2 2  
MONTH TO DATE 134 99 35 23  
SINCE MAR 1 191 179 12 48  
SINCE JAN 1 210 192 18 48    
...............................................................
 
 
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) 81 103 2003  
MINIMUM TEMPERATURE (F) 57 50 2010  
2019  
 
SUNRISE AND SUNSET  
MAY 28 2025...........SUNRISE 5:41 AM PDT SUNSET 7:55 PM PDT  
MAY 29 2025...........SUNRISE 5:41 AM PDT SUNSET 7:55 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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