Storm Station
South San Francisco, California
56° 63°/55°
Overcast· Feels like 56°·Gentle breeze 9 mph W
A slight chance of drizzle. Mostly cloudy, with a low around 55. West wind around 8 mph. Chance of precipitation is 20%.
0UV Low
50Air quality
92%Humidity
100%Cloud
Now
12:15 AM
56feels56
now, overcast
Today
Sep 27
6355
17mph
UV 6
overcast
Mon
Sep 28
7455
15mph
UV 6
clear day
Tue
Sep 29
7158
UV 6
clear day
Wed
Sep 30
8060
UV 6
clear day
Thu
Oct 1
7660
UV 6
partly cloudy day
Fri
Oct 2
7760
UV 6
overcast
Sat
Oct 3
8366
UV 6
overcast
56°
63°55°
74°55°
71°58°
80°60°
76°60°
77°60°
83°66°

As of 12:15 AM in South San Francisco, California.

What is measuring near here

The 4 instruments nearest South San Francisco, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.7 miles away.

measured now2 instruments

San Francisco INTLSFO

At an airfield/4.1 mi away/16 ft/22 ft below here

temp, wind, gust, visibility, precip, pressure

Rank2,007of 3,115

Spring Vly RAWSHSPC1

A remote fire weather station/6.5 mi away/1,030 ft/992 ft above here

temp, wind, gust, humidity, pressure

Rank583of 3,115

measured daily2 instruments

South San Francisco 6.1 WCA-SM-50

In a volunteer observer's own ground/0.7 mi away/38 ft/level with here

precip, snowfall, snow depth

Rank-

San Francisco OceansideSRSC1

At a cooperative observer's station/6.3 mi away/67 ft/29 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at San Francisco INTL, drawn

The nearest airport reporting now, 4.1 mi from South San Francisco. From its report of Sep 26, 2026, 11:56 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 800 ft, scattered at 1,400 ft, broken at 20,000 ft; the ceiling is 20,000 ft; visibility 10 mi or more.

Section of the sky over San Francisco INTL, height above the station to scale: a few clouds cloud with its base at 800 feet, scattered cloud with its base at 1,400 feet, broken cloud with its base at 20,000 feet, the ceiling at 20,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFOFIG. A THE SKY OVER SAN FRANCISCO INTLSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05,00010,00015,00020,00025,00030,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 20,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 1,400 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYFEW 800 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 20,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESan Francisco INTL, the skySTATION REPORT · ASOS SFOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-SFO-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014, FB-SKY-010, FB-SKY-011, FB-SKY-012

The air

58.0 F with a dew point of 53.0 F, 83 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 800 ft.

Chart of the air at San Francisco INTL: temperature 58.0 degrees Fahrenheit and dew point 53.0, 83 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFOFIG. B THE AIR AT SAN FRANCISCO INTLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 1,200 FT ABOVE THE STATION, AT 51.8 FLOWEST CLOUD REPORTED, FEW 800 FTTEMPERATURE 58.0 FDEW POINT 53.0 FSPREAD 5.0 FRELATIVE HUMIDITY 83 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLESan Francisco INTL, the airSTATION REPORT · ASOS SFOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-SFO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (260 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at San Francisco INTL, north up: blowing from 260 degrees, the west, at 12 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFOFIG. C THE WIND AT SAN FRANCISCO INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 260°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESan Francisco INTL, the windSTATION REPORT · ASOS SFOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-SFO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of San Francisco INTL, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in California

33 places, each with its own forecast and its own instruments.

Near South San Francisco

The nearest places, each with its own forecast and the instruments nearest it.