909
CXUS56 KSGX 030954
CLMONT
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
154 AM PST MON NOV 03 2025
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...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 107 10/01/2012
LOW 41 10/31/2019
HIGHEST 96 10/28 83 13 103 10/02
LOWEST 52 10/16 56 -4 49 10/30
AVG. MAXIMUM 81.4 82.6 -1.2 86.5
AVG. MINIMUM 57.1 57.1 0.0 59.5
MEAN 69.2 69.8 -0.6 73.0
DAYS MAX >= 90 5 8.0 -3.0 13
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MAX >= 45 31 31
DAYS MAX >= 120 0 0
DAYS MIN <= 32 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 2.20 1957
MINIMUM 0.00 2019
TOTALS 1.08 0.41 0.67 0.06
DAILY AVG. 0.03 0.01 0.02 0.00
DAYS >= .01 1 2.2 -1.2 1
DAYS >= .10 1 0.9 0.1 0
DAYS >= .50 1 0.3 0.7 0
DAYS >= 1.00 1 0.1 0.9 0
DAYS >= %-5.2F 0 0
DAYS >= %-5.2F 0 0
GREATEST
24 HR. TOTAL 1.08 10/14 TO 10/14 0.06 10/28 TO 10/28
STORM TOTAL 1.08 0.06
(MM/DD(HH)) MM
DEGREE DAYS
HEATING TOTAL 14 26 -12 13
SINCE 7/1 14 24 -10 MM
COOLING TOTAL 152 176 -24 267
SINCE 1/1 1941 1927 14 MM
FREEZE DATES
RECORD
EARLIEST 11/30/2004
LATEST 02/14/2006
EARLIEST 02/24
LATEST 02/20
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WIND (MPH)
AVERAGE WIND SPEED 4.4
RESULTANT WIND SPEED/DIRECTION 3/250
HIGHEST WIND SPEED/DIRECTION 21/050 DATE 10/17
HIGHEST GUST SPEED/DIRECTION 31/030 DATE 10/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.22
NUMBER OF DAYS FAIR 22
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 57
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 1
LIGHT RAIN 3 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 10 FOG W/VIS <= 1/4 MILE 4
HAZE 9
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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