500  
CDUS46 KSGX 121021  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
221 AM PST TUE DEC 12 2023  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR DECEMBER 11 2023...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1998 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 75 3:35 PM 83 2004 67 8 54  
MINIMUM 44 7:04 AM 34 1998 44 0 40  
2011  
AVERAGE 60 55 5 47  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.07 2022 0.06 -0.06 1.07  
MONTH TO DATE T 0.60 -0.60 1.12  
SINCE JUL 1 2.53 1.99 0.54 3.81  
SINCE OCT 1 0.37 1.81 -1.44 3.51  
SINCE JAN 1 20.97 10.35 10.62 5.21  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5 10 -5 18  
MONTH TO DATE 69 101 -32 131  
SINCE DEC 1 69 101 -32 131  
SINCE JUL 1 162 263 -101 357  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 2 0 2 0  
SINCE DEC 1 2 0 2 0  
SINCE JAN 1 1695 1967 -272 2301    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION W (290)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 3.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 53 10:00 PM  
LOWEST 14 3:00 PM  
AVERAGE 34  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 84 2010  
MINIMUM TEMPERATURE (F) 43 36 2007  
 
SUNRISE AND SUNSET  
DECEMBER 12 2023......SUNRISE 6:46 AM PST SUNSET 4:42 PM PST  
DECEMBER 13 2023......SUNRISE 6:47 AM PST SUNSET 4:42 PM PST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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