Climatological Report (Monthly)
Issued by NWS

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395
CXUS56 KMTR 011620
CLMSFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
816 AM PST THU FEB 1 2018

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1927 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              74   01/31/2018
                        01/31/2015
                        12/07/2036
 LOW               26   01/05/1949
HIGHEST            66   01/28                         64  01/08
LOWEST             42   01/27                         38  01/06
                        01/26
                        01/21
AVG. MAXIMUM     58.8              56.3     2.5     56.5
AVG. MINIMUM     48.1                               44.7
MEAN             53.5              50.3     3.2     50.6
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        11.26   1993
 MINIMUM         0.00   2015
TOTALS           4.85              4.19    0.66     9.33
DAILY AVG.       0.16              0.14    0.02     0.30
DAYS >= .01         9                                 16
DAYS >= .10         8                                 13
DAYS >= .50         1                                  7
DAYS >= 1.00        1                                  3
GREATEST
 24 HR. TOTAL    3.12   01/08 TO 01/08           01/09 TO 01/10

DEGREE_DAYS
HEATING TOTAL     351               457    -106      439
 SINCE 7/1       1089              1467    -378     1290
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.7
RESULTANT WIND SPEED/DIRECTION   1/304
HIGHEST WIND SPEED/DIRECTION    37/290    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    50/210    DATE  01/24

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     78

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

$$




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