Climatological Report (Monthly)
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000
CXUS56 KMTR 040319
CLMSTS


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
819 PM PDT TUE OCT 3 2017

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

...THE SANTA ROSA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

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             110   09/02/2017
                        09/01/2017
                        06/14/2000
 LOW               39   09/09/2012
                        09/30/2007
                        09/25/2005
HIGHEST           110R  09/02                        100  09/26
                        09/01
LOWEST             41   09/22                         42  09/04
AVG. MAXIMUM     86.2              83.2     3.0     83.9
AVG. MINIMUM     53.1              49.3     3.8     49.5
MEAN             69.6              66.3     3.3     66.7
DAYS MAX >= 90      8               7.2     0.8        9
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         0.84   2014
 MINIMUM         0.00   2012
                        2002
TOTALS           0.03                                  T
DAILY AVG.       0.00                                  T
DAYS >= .01         2                                  0
DAYS >= .10         0                                  0
DAYS >= .50         0                                  0
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.02   09/07 TO 09/07           09/12 TO 09/12
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL      14                                 27
 SINCE 7/1         18                                 39
COOLING TOTAL     163                                 86
 SINCE 1/1        601                                347
.................................................

WIND (MPH)
AVERAGE WIND SPEED              4.6
RESULTANT WIND SPEED/DIRECTION   1/212
HIGHEST WIND SPEED/DIRECTION    22/320    DATE  09/18
HIGHEST GUST SPEED/DIRECTION    28/170    DATE  09/11

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           20
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      4
HAZE                     11

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

$$



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