870
CXUS56 KSGX 011036
CLMFUL

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
236 AM PST THU JAN 01 2026

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

...THE FULLERTON AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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
................................................................
TEMPERATURE (F)
RECORD
 HIGH             87   12/10/2017
                       12/09/2017
                       12/12/2010
 LOW              25   12/15/2021
HIGHEST           86   12/10         70      16       86  12/18
LOWEST            42   12/28         46      -4       42  12/06
                                                          12/07
AVG. MAXIMUM    71.2               68.1     3.1     69.1
AVG. MINIMUM    49.8               45.6     4.2     47.1
MEAN            60.5               56.9     3.6     58.1
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MAX >= 45    31                                  31
DAYS MIN <= 32     0                0.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.95   2010
 MINIMUM        0.01   2024
TOTALS          3.22               1.86    1.36     0.01
DAILY AVG.      0.10               0.06    0.04     0.00
DAYS >= .01        5                6.3    -1.3        1
DAYS >= .10        3                3.3    -0.3        0
DAYS >= .50        2                1.5     0.5        0
DAYS >= 1.00       1                0.4     0.6        0
DAYS >= %-5.2F     0                                   0
DAYS >= %-5.2F     0                                   0
GREATEST
 24 HR. TOTAL   1.97   12/23 TO 12/24               0.01  12/24 TO 12/24
 STORM TOTAL    1.96                                0.01
 (MM/DD(HH))            MM


DEGREE DAYS
HEATING TOTAL    135                254    -119      208
 SINCE 7/1       228                382    -154       MM
COOLING TOTAL      4                  2       2        2
 SINCE 1/1      1459               1508     -49       MM

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST      12/31             12/31
LATEST                          MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              2.9
RESULTANT WIND SPEED/DIRECTION   2/100
HIGHEST WIND SPEED/DIRECTION    26/080    DATE  12/29
HIGHEST GUST SPEED/DIRECTION    37/080    DATE  12/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.32
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN                5     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      6
HAZE                     19

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

$$