155
CXUS56 KSGX 020255
CLMONT
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
755 PM PDT THU MAY 01 2025
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...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 101 04/26/2004
LOW 33 04/10/1999
HIGHEST 89 04/05 76 13 88 04/11
04/09
04/11
LOWEST 43 04/02 49 -6 41 04/06
AVG. MAXIMUM 73.9 75.7 -1.8 72.7
AVG. MINIMUM 51.6 51.1 0.5 49.7
MEAN 62.7 63.4 -0.7 61.2
DAYS MAX >= 90 0 2.6 -2.6 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MAX >= 45 30 30
DAYS MAX >= 120 0 0
DAYS MIN <= 32 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.95 1965
MINIMUM 0.00 1979
TOTALS 0.26 0.76 -0.50 0.56
DAILY AVG. 0.01 0.03 -0.02 0.02
DAYS >= .01 2 3.6 -1.6 5
DAYS >= .10 1 1.8 -0.8 3
DAYS >= .50 0 0.7 -0.7 0
DAYS >= 1.00 0 0.1 -0.1 0
DAYS >= %-5.2F 0 0
DAYS >= %-5.2F 0 0
GREATEST
24 HR. TOTAL 0.25 04/26 TO 04/26 0.40 04/13 TO 04/14
STORM TOTAL 0.25 0.31
(MM/DD(HH)) MM
DEGREE DAYS
HEATING TOTAL 107 105 2 134
SINCE 7/1 1102 1250 -148 MM
COOLING TOTAL 44 57 -13 25
SINCE 1/1 76 93 -17 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 6.3
RESULTANT WIND SPEED/DIRECTION 5/240
HIGHEST WIND SPEED/DIRECTION 26/050 DATE 04/05
HIGHEST GUST SPEED/DIRECTION 37/050 DATE 04/05
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.49
NUMBER OF DAYS FAIR 11
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 10
AVERAGE RH (PERCENT) 58
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 4 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 8 FOG W/VIS <= 1/4 MILE 0
HAZE 14
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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