317
CDUS46 KSGX 220050
CLIONT
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
450 PM PST SUN DEC 21 2025
...............................
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR DECEMBER 21 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 75 3:29 PM 82 2005 66 9 72
2020
MINIMUM 47 5:58 AM 33 2012 43 4 45
AVERAGE 61 55 6 59
PRECIPITATION (IN)
TODAY 0.00 2.84 2010 0.06 -0.06 0.00
MONTH TO DATE 0.00 1.21 -1.21 0.00
SINCE JUL 1 5.21 2.60 2.61 0.15
SINCE OCT 1 5.09 2.42 2.67 0.15
SINCE JAN 1 11.28 10.96 0.32 16.44
DEGREE DAYS
HEATING
TODAY 4 10 -6 6
MONTH TO DATE 67 201 -134 106
SINCE DEC 1 67 201 -134 106
SINCE JUL 1 178 363 -185 257
COOLING
TODAY 0 0 0 0
MONTH TO DATE 9 0 9 5
SINCE DEC 1 9 0 9 5
SINCE JAN 1 2014 1967 47 2032
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 0 RESULTANT WIND DIRECTION NW (330)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 0.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 33 2:00 PM
AVERAGE 63
......................................................
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 66 77 2014
MINIMUM TEMPERATURE (F) 43 28 1998
SUNRISE AND SUNSET
DECEMBER 21 2025......SUNRISE 6:52 AM PST SUNSET 4:45 PM PST
DECEMBER 22 2025......SUNRISE 6:53 AM PST SUNSET 4:46 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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