Climatological Report (Daily)
Issued by NWS
Issued by NWS
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535
CDUS46 KSGX 190031
CLIONT
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
531 PM PDT MON AUG 18 2025
...................................
...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR AUGUST 18 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 93 2:51 PM 108 2020 95 -2 94
MINIMUM 62 5:56 AM 59 2009 65 -3 63
AVERAGE 78 80 -2 79
PRECIPITATION (IN)
TODAY 0.00 T 2021 0.00 0.00 0.00
MONTH TO DATE 0.00 0.02 -0.02 T
SINCE JUL 1 0.00 0.07 -0.07 T
SINCE OCT 1 6.22 11.53 -5.31 17.64
SINCE JAN 1 6.07 8.43 -2.36 16.29
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 0 4 -4 2
SINCE JUL 1 0 0 0 0
COOLING
TODAY 13 15 -2 14
MONTH TO DATE 253 270 -17 334
SINCE JUN 1 886 962 -76 1139
SINCE JAN 1 1136 1176 -40 1200
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION SW (240)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 4.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 6:00 AM
LOWEST 28 12:00 PM
AVERAGE 61
..........................................................
THE ONTARIO INTL AIRPORT CA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 95 107 2020
MINIMUM TEMPERATURE (F) 65 59 2009
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:14 AM PDT SUNSET 7:33 PM PDT
AUGUST 19 2025........SUNRISE 6:15 AM PDT SUNSET 7:32 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$