821
CXUS56 KMTR 010834
CLMHWD

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1234 AM PST THU JAN 01 2026

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

...THE HAYWARD AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025

WEATHER         OBSERVED          NORMAL    LAST YEAR`S
                VALUE   DATE(S)   VALUE     VALUE DATE(S)

.........................................................
TEMPERATURE (F)
RECORD
 HIGH             76   12/07/2020
                       12/07/2020
 LOW                   12/23/2013
HIGHEST           66   12/03                   69  12/02
                       12/17
                                                   12/09
                                                   12/23
LOWEST            38   12/30                   40  12/09
                                                   12/19
                                                   12/31
AVG. MAXIMUM    58.5                         62.9
AVG. MINIMUM    45.3                         47.0
MEAN            51.9                         55.0
DAYS MAX >= 90     0                            0
DAYS MAX <= 32     0                            0
DAYS MIN <= 32     0                            0
DAYS MIN <= 0      0                            0

PRECIPITATION (INCHES)
TOTALS          3.50               3.20      4.88
DAILY AVG.      0.11                         0.16
DAYS >= .01        9                           12
DAYS >= .10        6                            9
DAYS >= .50        3                            4


DEGREE DAYS
HEATING TOTAL    399                          302
 SINCE 7/1       727                           MM
COOLING TOTAL      0                            0
 SINCE 1/1       295                           MM
.........................................................

WIND (MPH)
AVERAGE WIND SPEED              5.9
RESULTANT WIND SPEED/DIRECTION   2/110
HIGHEST WIND SPEED/DIRECTION    32/140    DATE  12/25
HIGHEST GUST SPEED/DIRECTION    46/180    DATE  12/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.39
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     79

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      21     FOG W/VIS <= 1/4 MILE      1
HAZE                     13

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

$$