Climatological Report (Monthly)
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CXUS56 KMTR 012253
CLMSFO

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
353 PM PDT THU OCT 01 2020

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2020...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1927 TO 2020

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
                       02/13/2353849
 LOW              41   09/30/1950
HIGHEST          102   09/06                          96  09/25
LOWEST            55   09/12                          52  09/30
                       09/13
                       09/14
                                                          09/29
AVG. MAXIMUM    78.4               73.6     4.8     77.1
AVG. MINIMUM    58.9                                59.1
MEAN            68.7               64.7     4.0     68.1
DAYS MAX >= 90     6                                   4
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   2020
TOTALS          0.00R              0.17   -0.17     0.06
DAILY AVG.      0.00               0.01   -0.01     0.00
DAYS >= .01        0                                   2
DAYS >= .10        0                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.00   08/31 TO 08/31               0.04  09/16 TO 09/16


DEGREE DAYS
HEATING TOTAL     14                 53     -39       16
 SINCE 7/1        78                173     -95       45
COOLING TOTAL    131                 44      87      116
 SINCE 1/1       296                141     155      333
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.7
RESULTANT WIND SPEED/DIRECTION  10/300
HIGHEST WIND SPEED/DIRECTION    35/280    DATE  09/07
HIGHEST GUST SPEED/DIRECTION    38/280    DATE  09/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.51
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      20     FOG W/VIS <= 1/4 MILE      1
HAZE                     24

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

$$


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