Climatological Report (Monthly)
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000
CXUS56 KSGX 011014
CLMONT

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
214 AM PST MON JAN 01 2024

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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             87   12/01/2021
                       12/01/2021
 LOW              28   12/23/1998
                       12/22/1998
HIGHEST           84   12/05         69      15       81  12/25
LOWEST            40   12/10         44      -4       35  12/18
AVG. MAXIMUM    69.9               66.9     3.0     63.4
AVG. MINIMUM    47.3               43.6     3.7     43.5
MEAN            58.6               55.2     3.4     53.5
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MAX >= 45    31                                  31
DAYS MAX >= 120    0                                   0
DAYS MIN <= 32     0                0.8    -0.8        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        7.73   2010
 MINIMUM        0.00   1963
TOTALS          0.98               1.89   -0.91     1.69
DAILY AVG.      0.03               0.06   -0.03     0.05
DAYS >= .01        5                5.6    -0.6        7
DAYS >= .10        3                3.4    -0.4        3
DAYS >= .50        0                1.1    -1.1        1
DAYS >= 1.00       0                0.6    -0.6        1
DAYS >= %-5.2F     0                                   0
DAYS >= %-5.2F     0                                   0
GREATEST
 24 HR. TOTAL   0.36   12/22 TO 12/22               1.07  12/11 TO 12/11
                       12/20 TO 12/20
                       12/22 TO 12/22
 STORM TOTAL    0.36                                1.07
 (MM/DD(HH))            MM


DEGREE DAYS
HEATING TOTAL    191                304    -113      351
 SINCE 7/1       284                463    -179       MM
COOLING TOTAL      2                  2       0        0
 SINCE 1/1      1695               1969    -274       MM

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

WIND (MPH)
AVERAGE WIND SPEED              3.1
RESULTANT WIND SPEED/DIRECTION   1/310
HIGHEST WIND SPEED/DIRECTION    20/290    DATE  12/18
HIGHEST GUST SPEED/DIRECTION    26/060    DATE  12/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.54
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       4
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      5
HAZE                     15

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

$$


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