Climatological Report (Monthly)
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000
CXUS56 KMTR 021519
CLMSTS


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
718 AM PST MON JAN 2 2017

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

...THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017

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            66   12/04                         63  12/08
                        12/03
LOWEST             25   12/18                         27  12/27
AVG. MAXIMUM     57.2              56.3     0.9     56.5
AVG. MINIMUM     34.4              36.5    -2.1     38.1
MEAN             45.8              46.4    -0.6     47.3
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32     15               9.7     5.3        9
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        17.95   2005
 MINIMUM         0.20   2011
TOTALS           6.75                               7.01
DAILY AVG.       0.22                               0.23
DAYS >= .01         8                                 17
DAYS >= .10         8                                 13
DAYS >= .50         6                                  7
DAYS >= 1.00        1                                  1
GREATEST
 24 HR. TOTAL    2.87   12/14 TO 12/15           12/20 TO 12/21
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31

DEGREE_DAYS
HEATING TOTAL     587                                540
 SINCE 7/1       1080                                985
COOLING TOTAL       0                                  0
 SINCE 1/1        356                                596
..................................................

WIND (MPH)
AVERAGE WIND SPEED              3.7
RESULTANT WIND SPEED/DIRECTION   1/319
HIGHEST WIND SPEED/DIRECTION    23/320    DATE  12/16
HIGHEST GUST SPEED/DIRECTION    31/300    DATE  12/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       7
LIGHT RAIN                8     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      8
HAZE                      0

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

$$



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