Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 012302
CLMSTS


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
302 PM PST THU JAN 1 2015

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

...THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2014

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                         71  12/28
                                                          12/01
LOWEST             30   12/29                         19  12/09
                        12/27
AVG. MAXIMUM     59.9              56.3     3.6     60.9
AVG. MINIMUM     45.7              36.5     9.2     28.2
MEAN             52.8              46.4     6.4     44.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      3               9.7    -6.7       21
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        17.95   2005
 MINIMUM         0.20   2011
TOTALS          14.49                               0.41
DAILY AVG.       0.47                               0.01
DAYS >= .01        21                                  1
DAYS >= .10        15                                  1
DAYS >= .50         8                                  0
DAYS >= 1.00        5                                  0
GREATEST
 24 HR. TOTAL    5.31   12/10 TO 12/11           12/06 TO 12/06
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31

DEGREE_DAYS
HEATING TOTAL     369                                548
 SINCE 7/1        727                               1111
COOLING TOTAL       0                                  0
 SINCE 1/1        499                                415
..................................................

WIND (MPH)
AVERAGE WIND SPEED              4.1
RESULTANT WIND SPEED/DIRECTION   1/052
HIGHEST WIND SPEED/DIRECTION    37/030    DATE  12/30
HIGHEST GUST SPEED/DIRECTION    45/030    DATE  12/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY         20

AVERAGE RH (PERCENT)     84

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                7     RAIN                      13
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      26     FOG W/VIS <= 1/4 MILE     15
HAZE                      5

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

$$



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