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000
CXUS56 KMTR 012238
CLMSTS


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
235 PM PST TUE JAN 1 2013

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

...THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2012

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              78   12/19/1999
 LOW               21   12/08/2009
                        12/22/1998
                        12/21/1998
HIGHEST            69   12/09                         75  12/02
LOWEST             26   12/19                         25  12/24
AVG. MAXIMUM     56.5              56.3     0.2     61.2
AVG. MINIMUM     37.9              36.5     1.4     31.8
MEAN             47.2              46.4     0.8     46.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      8               9.7    -1.7       20
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        17.95   2005
 MINIMUM         0.20   2011
TOTALS          11.73                               0.20
DAILY AVG.       0.38                               0.01
DAYS >= .01        19                                  3
DAYS >= .10        13                                  1
DAYS >= .50         8                                  0
DAYS >= 1.00        4                                  0
GREATEST
 24 HR. TOTAL    2.80   12/20 TO 12/21           12/15 TO 12/15
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31

DEGREE_DAYS
HEATING TOTAL     544                                566
 SINCE 7/1       1067                               1151
COOLING TOTAL       0                                  0
 SINCE 1/1        340                                345
..................................................

WIND (MPH)
AVERAGE WIND SPEED              3.9
RESULTANT WIND SPEED/DIRECTION   1/258
HIGHEST WIND SPEED/DIRECTION    33/190    DATE  12/02
HIGHEST GUST SPEED/DIRECTION    46/180    DATE  12/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     80

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      11
LIGHT RAIN               19     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      30     FOG W/VIS <= 1/4 MILE     10
HAZE                      4

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

$$