Climatological Report (Monthly)
Issued by NWS
Issued by NWS
173
CXUS56 KMTR 010836
CLMSFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
136 AM PDT SUN JUN 01 2025
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...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 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
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TEMPERATURE (F)
RECORD
HIGH 97 05/27/1984
LOW 39 05/03/1950
HIGHEST 81 05/05 84 05/09
LOWEST 49 05/04 48 05/05
05/21
AVG. MAXIMUM 67.6 68.3 -0.7 69.1
AVG. MINIMUM 51.5 52.5
MEAN 59.6 59.9 -0.3 60.8
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 0.11 0.48 -0.37 0.95
DAILY AVG. 0.00 0.02 -0.02 0.03
DAYS >= .01 2 1
DAYS >= .10 1 1
DAYS >= .50 0 1
DAYS >= 1.00 0 0
GREATEST
24 HR. TOTAL 0.10 05/12 TO 05/12 0.95 05/04 TO 05/04
DEGREE DAYS
HEATING TOTAL 163 170 -7 133
SINCE 7/1 2250 2377 -127 MM
COOLING TOTAL 3 14 -11 10
SINCE 1/1 6 20 -14 MM
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WIND (MPH)
AVERAGE WIND SPEED 14.6
RESULTANT WIND SPEED/DIRECTION 13/280
HIGHEST WIND SPEED/DIRECTION 44/280 DATE 05/19
HIGHEST GUST SPEED/DIRECTION 55/270 DATE 05/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.37
NUMBER OF DAYS FAIR 16
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 69
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 1
LIGHT RAIN 3 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 18 FOG W/VIS <= 1/4 MILE 0
HAZE 27
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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