875
CXUS56 KMTR 010853
CLMSTS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1253 AM PST MON JAN 01 2024

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

...THE SANTA ROSA AIRPORT 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             78   12/15/2013
                       12/19/1999
                       12/04/1958
 LOW              19   12/09/2013
HIGHEST           70   12/22                          63  12/24
LOWEST            30   12/10                          26  12/16
                                                          12/18
AVG. MAXIMUM    60.8               57.5     3.3     55.9
AVG. MINIMUM    41.6               36.9     4.7     36.8
MEAN            51.2               47.2     4.0     46.4
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     6               10.9    -4.9       11
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       17.95   2005
 MINIMUM        0.08   2017
TOTALS          8.74                                9.71
DAILY AVG.      0.28                                0.31
DAYS >= .01       13                                  14
DAYS >= .10        9                                  13
DAYS >= .50        4                                   9
DAYS >= 1.00       4                                   3
GREATEST
 24 HR. TOTAL   2.74   12/18 TO 12/18               2.94  12/26 TO 12/27


DEGREE DAYS
HEATING TOTAL    420                                 570
 SINCE 7/1       866                                  MM
COOLING TOTAL      0                                   0
 SINCE 1/1       498                                  MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              3.1
RESULTANT WIND SPEED/DIRECTION   0/180
HIGHEST WIND SPEED/DIRECTION    17/200    DATE  12/19
                                17/140          12/27
                                17/140          12/29
HIGHEST GUST SPEED/DIRECTION    28/200    DATE  12/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.58
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     83

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                7     RAIN                      11
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      31     FOG W/VIS <= 1/4 MILE     17
HAZE                      1

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

$$