449
CXUS56 KMTR 011102
CLMSFO

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
402 AM PDT MON SEP 01 2025

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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1927 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            100   08/01/1993
 LOW              42   08/21/1928
HIGHEST           84   08/30                          86  08/27
LOWEST            55   08/23                         -64  08/08
                                                          08/16
AVG. MAXIMUM    73.1               73.4    -0.3     70.2
AVG. MINIMUM    57.9                                50.8
MEAN            65.5               64.9     0.6     60.5
DAYS MAX >= 90     0                                   0
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   1
DAYS MIN <= 0      0                                   1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        0.66   1976
 MINIMUM        0.00   2021
TOTALS             T               0.04   -0.04     0.10
DAILY AVG.         T               0.00   -0.00     0.00
DAYS >= .01        0                                   1
DAYS >= .10        0                                   1
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL      T   08/13 TO 08/13               0.10  08/24 TO 08/24


DEGREE DAYS
HEATING TOTAL     21                 44     -23      144
 SINCE 7/1        90                101     -11       MM
COOLING TOTAL     42                 41       1       14
 SINCE 1/1        50                110     -60       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              13.6
RESULTANT WIND SPEED/DIRECTION  13/290
HIGHEST WIND SPEED/DIRECTION    41/270    DATE  08/03
                                41/270          08/15
HIGHEST GUST SPEED/DIRECTION    56/270    DATE  08/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.38
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     72

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                      26     FOG W/VIS <= 1/4 MILE      0
HAZE                     31

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

$$