333
CDUS46 KMTR 210832
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
132 AM PDT THU MAY 21 2026
...............................
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR MAY 20 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1927 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 73 1:01 PM 93 1988 69 4 65
MINIMUM 53 5:08 AM 45 1950 52 1 51
1976
1982
AVERAGE 63 60 3 58
PRECIPITATION (IN)
YESTERDAY 0.00 1.53 1957 0.02 -0.02 0.00
MONTH TO DATE 0.11 0.35 -0.24 0.11
SINCE OCT 1 19.38 19.26 0.12 16.11
SINCE JAN 1 10.53 12.29 -1.76 7.55
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE MAR 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 2 5 -3 7
MONTH TO DATE 102 119 -17 109
SINCE MAR 1 375 649 -274 663
SINCE JUL 1 1723 2328 -605 2196
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 6 0 6 2
SINCE MAR 1 42 6 36 5
SINCE JAN 1 43 6 37 5
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 11.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 11:00 PM
LOWEST 46 1:00 PM
AVERAGE 66
......................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 92 2000
MINIMUM TEMPERATURE (F) 52 45 1962
1974
SUNRISE AND SUNSET
MAY 21 2026...........SUNRISE 5:55 AM PDT SUNSET 8:17 PM PDT
MAY 22 2026...........SUNRISE 5:55 AM PDT SUNSET 8:18 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page