Climatological Report (Monthly)
Issued by NWS

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000
CXUS56 KMTR 020929
CLMSFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
218 AM PDT TUE MAY 2 2017

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              92   04/08/1989
                        04/29/1981
 LOW               36   04/27/1955
HIGHEST            78   04/01                         86  04/06
LOWEST             45   04/09                         47  04/26
                                                          04/25
AVG. MAXIMUM     66.2              64.7     1.5     68.0
AVG. MINIMUM     50.7                               52.6
MEAN             58.4              56.9     1.5     60.3
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.36   1958
 MINIMUM         0.00   1977
                        1949
TOTALS           2.20              1.29    0.91     0.82
DAILY AVG.       0.07              0.04    0.03     0.03
DAYS >= .01         9                                  6
DAYS >= .10         6                                  3
DAYS >= .50         1                                  0
DAYS >= 1.00        1                                  0
GREATEST
 24 HR. TOTAL    1.02   04/06 TO 04/07           04/08 TO 04/09
                                                          04/30 TO 04/30
                                                          04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     191               248     -57      153
 SINCE 7/1       2009              2368    -359     1768
COOLING TOTAL       2                 5      -3       20
 SINCE 1/1          2                 6      -4       20
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.9
RESULTANT WIND SPEED/DIRECTION   8/269
HIGHEST WIND SPEED/DIRECTION    39/190    DATE  04/06
HIGHEST GUST SPEED/DIRECTION    48/190    DATE  04/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                      6

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

$$



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