776  
CDUS46 KSGX 310936  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
236 AM PDT SAT MAY 31 2025  
   
...............................
 
 
   
..THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR MAY 30 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 100R 3:07 PM 94 2004 82 18 83  
MINIMUM 61 4:08 AM 49 1998 57 4 55  
AVERAGE 81 70 11 69  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 T 2004 0.01 -0.01 0.00  
2018  
2023  
MONTH TO DATE 0.25 0.30 -0.05 0.15  
SINCE JUL 1 6.12 11.62 -5.50 19.80  
SINCE OCT 1 6.12 11.44 -5.32 17.64  
SINCE JAN 1 5.97 8.34 -2.37 16.29  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 32 37 -5 34  
SINCE MAR 1 376 314 62 424  
SINCE JUL 1 1134 1288 -154 1312  
 
COOLING  
YESTERDAY 16 5 11 4  
MONTH TO DATE 159 114 45 32  
SINCE MAR 1 216 194 22 57  
SINCE JAN 1 235 207 28 57    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION W (260)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 7.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 4:00 AM  
LOWEST 16 1:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 96 2006  
MINIMUM TEMPERATURE (F) 57 52 1998  
 
SUNRISE AND SUNSET  
MAY 31 2025...........SUNRISE 5:40 AM PDT SUNSET 7:56 PM PDT  
JUNE 1 2025..........SUNRISE 5:40 AM PDT SUNSET 7:57 PM PDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab CA Page Main Text Page