926  
CDUS46 KSGX 220925  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
225 AM PDT THU MAY 22 2025  
   
...............................  
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 21 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 95 2:30 PM 101 2000 80 15 76  
MINIMUM 63 5:03 AM 47 2002 56 7 55  
AVERAGE 79 68 11 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2018 0.01 -0.01 0.00  
2018  
2019  
MONTH TO DATE 0.25 0.25 -0.00 0.15  
SINCE JUL 1 6.12 11.57 -5.45 19.80  
SINCE OCT 1 6.12 11.39 -5.27 17.64  
SINCE JAN 1 5.97 8.29 -2.32 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 32 30 2 24  
SINCE MAR 1 376 307 69 414  
SINCE JUL 1 1134 1281 -147 1302  
 
COOLING  
YESTERDAY 14 4 10 1  
MONTH TO DATE 102 74 28 21  
SINCE MAR 1 159 154 5 46  
SINCE JAN 1 178 167 11 46    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION SW (240)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (230)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 63 6:00 AM  
LOWEST 15 2:00 PM  
AVERAGE 39  
   
......................................................  
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 96 2005  
MINIMUM TEMPERATURE (F) 56 48 2002  
 
SUNRISE AND SUNSET  
MAY 22 2025...........SUNRISE 5:44 AM PDT SUNSET 7:51 PM PDT  
MAY 23 2025...........SUNRISE 5:44 AM PDT SUNSET 7:51 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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