Climatological Report (Monthly)
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000
CXUS56 KMTR 040319
CLMSFO


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

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1927 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             104   09/02/2017
                        09/01/2017
                        49/02/2353
 LOW               41   09/30/1950
HIGHEST           104R  09/02                         94  09/25
                        09/01
LOWEST             54   09/24                         52  09/23
                        09/23
AVG. MAXIMUM     79.0              73.6     5.4     73.6
AVG. MINIMUM     60.5                               56.0
MEAN             69.8              64.7     5.1     64.8
DAYS MAX >= 90      3                                  2
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.30   1959
 MINIMUM         0.00   2016
                        2012
                        2008
TOTALS           0.22              0.17    0.05     0.00
DAILY AVG.       0.01              0.01    0.00     0.00
DAYS >= .01         1                                  0
DAYS >= .10         1                                  0
DAYS >= .50         0                                  0
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.22   09/11 TO 09/11           09/30 TO 09/30
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL       7                53     -46       60
 SINCE 7/1         67               166     -99      163
COOLING TOTAL     159                44     115       60
 SINCE 1/1        291               141     150      125
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
RESULTANT WIND SPEED/DIRECTION   8/278
HIGHEST WIND SPEED/DIRECTION    36/270    DATE  09/21
HIGHEST GUST SPEED/DIRECTION    43/270    DATE  09/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     62

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