456
CXUS56 KMTR 011630
CLMSFO

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
930 AM PDT MON JUN 01 2026

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1927 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             97   05/27/1984
 LOW              39   05/03/1950
HIGHEST           82   05/19                          80  05/30
LOWEST            50   05/11                          52  05/30
                       05/17
                       05/22
                                                          05/21
AVG. MAXIMUM    67.3               68.3    -1.0     74.7
AVG. MINIMUM    52.7                                53.0
MEAN            60.0               59.9     0.1     63.9
DAYS MAX >= 90     0                                   0
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.81   1957
 MINIMUM        0.00   2008
TOTALS          0.31               0.48   -0.17     0.11
DAILY AVG.      0.01               0.02   -0.01     0.00
DAYS >= .01        4                                   0
DAYS >= .10        1                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.20   05/28 TO 05/29               0.10  05/12 TO 05/12


DEGREE DAYS
HEATING TOTAL    149                170     -21        4
 SINCE 7/1      1770               2377    -607       MM
COOLING TOTAL      6                 14      -8        1
 SINCE 1/1        43                 20      23       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              13.3
RESULTANT WIND SPEED/DIRECTION  11/280
HIGHEST WIND SPEED/DIRECTION    36/270    DATE  05/15
                                36/290          05/26
HIGHEST GUST SPEED/DIRECTION    47/280    DATE  05/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.47
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     71

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                      22     FOG W/VIS <= 1/4 MILE      0
HAZE                     26

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

$$