519  
CDUS46 KSGX 180929  
CLIONT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN DIEGO, CA  
129 AM PST MON DEC 18 2023  
   
...............................
 
 
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR DECEMBER 17 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 78 1:30 PM 85 1998 66 12 63  
MINIMUM 46 6:32 AM 36 2022 43 3 36  
AVERAGE 62 55 7 50  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.87 2008 0.06 -0.06 0.00  
MONTH TO DATE T 0.97 -0.97 1.35  
SINCE JUL 1 2.53 2.36 0.17 4.04  
SINCE OCT 1 0.37 2.18 -1.81 3.74  
SINCE JAN 1 20.97 10.72 10.25 5.44  
 
DEGREE DAYS  
HEATING  
YESTERDAY 3 10 -7 15  
MONTH TO DATE 99 161 -62 229  
SINCE DEC 1 99 161 -62 229  
SINCE JUL 1 192 323 -131 455  
 
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 2 RESULTANT WIND DIRECTION W (280)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION W (260)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 3.5  
 
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 44 12:00 AM  
LOWEST 11 2:00 PM  
AVERAGE 28  
   
......................................................
 
 
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 81 2003  
MINIMUM TEMPERATURE (F) 43 33 2016  
 
SUNRISE AND SUNSET  
DECEMBER 18 2023......SUNRISE 6:50 AM PST SUNSET 4:44 PM PST  
DECEMBER 19 2023......SUNRISE 6:51 AM PST SUNSET 4:44 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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