203
CXUS56 KSGX 011249
CLMONT

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
449 AM PST WED JAN 01 2025

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2024

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           85   12/18         69      16       84  12/05
LOWEST            39   12/12         44      -5       32  12/14
AVG. MAXIMUM    71.0               66.9     4.1     69.9
AVG. MINIMUM    46.2               43.6     2.6     47.0
MEAN            58.6               55.2     3.4     58.5
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        1

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


DEGREE DAYS
HEATING TOTAL    196                304    -108      196
 SINCE 7/1       347                463    -116       MM
COOLING TOTAL      5                  2       3        2
 SINCE 1/1      2032               1969      63       MM

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

WIND (MPH)
AVERAGE WIND SPEED              3.2
RESULTANT WIND SPEED/DIRECTION   1/270
HIGHEST WIND SPEED/DIRECTION    37/040    DATE  12/10
HIGHEST GUST SPEED/DIRECTION    61/050    DATE  12/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.48
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             18
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      2
HAZE                     20

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

$$