Climatological Report (Monthly)
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000
CXUS56 KSGX 011025
CLMONT

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
325 AM PDT SUN OCT 01 2023

...................................

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            118   09/05/2020
 LOW              51   09/27/2013
HIGHEST           98   09/08         91       7      109  09/04
                       09/09
LOWEST            58   09/22         62      -4       60  09/20
                       09/24
                                                          09/21
                                                          09/22
AVG. MAXIMUM    83.7               91.3    -7.6     93.8
AVG. MINIMUM    63.2               63.8    -0.6     68.9
MEAN            73.5               77.6    -4.1     81.3
DAYS MAX >= 90     7               17.5   -10.5       18
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        3.54   1963
 MINIMUM        0.00   2020
TOTALS          0.24               0.10    0.14     0.27
DAILY AVG.      0.01               0.00    0.01     0.01
DAYS >= .01        5                0.7     4.3        3
DAYS >= .10        1                0.3     0.7        2
DAYS >= .50        0                0.0     0.0        0
DAYS >= 1.00       0                0.0     0.0        0
DAYS >= %-5.2F     0                                   0
DAYS >= %-5.2F     0                                   0
GREATEST
 24 HR. TOTAL   0.18   09/01 TO 09/02               0.14  09/11 TO 09/11
 STORM TOTAL    0.13                                0.14
 (MM/DD(HH))            MM


DEGREE DAYS
HEATING TOTAL      1                  1       0        0
 SINCE 7/1         1                  0       1       MM
COOLING TOTAL    263                378    -115      498
 SINCE 1/1      1451               1751    -300       MM

FREEZE DATES
RECORD
 EARLIEST     11/30/2004
 LATEST       02/14/2006
EARLIEST                        02/24
LATEST                          02/20
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.1
RESULTANT WIND SPEED/DIRECTION   5/250
HIGHEST WIND SPEED/DIRECTION    25/230    DATE  09/30
HIGHEST GUST SPEED/DIRECTION    31/240    DATE  09/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.46
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     64

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      1
HAZE                     18

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$


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