Storm Station
San Marino, California
92°
Partly cloudy· Feels like 92°·Light breeze 7 mph SW
Mostly cloudy, with a low around 66. East southeast wind around 5 mph.
-UV
75Air quality
35%Humidity
62%Cloud

What is measuring near here

The 4 instruments nearest San Marino, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now2 instruments

El MonteEMT

At an airfield/4.9 mi away/295 ft/268 ft below here

temp, wind, gust, visibility, precip, pressure

Rank3,106of 3,115

Henninger FlatsHNGC1

At a river or reservoir gauge/5.2 mi away/2,858 ft/2,295 ft above here

temp, wind, gust, humidity, pressure

Rank595of 3,115

measured daily2 instruments

Pasadena - San Gabriel FireJBLC1

At a cooperative observer's station/1.2 mi away/468 ft/95 ft below here

snowfall, snow depth, precip, high, low

Rank-

Pasadena 2.0 SECA-LA-36

In a volunteer observer's own ground/1.3 mi away/739 ft/176 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Henninger Flats, drawn

The nearest instrument reporting now, 5.2 mi from San Marino. From its report of Sep 26, 2026, 11:58 PM local time: 3 of its 5 sheets.

The air

75.0 F with a dew point of 47.7 F, 38 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 6,200 ft up.

Chart of the air at Henninger Flats: temperature 75.0 degrees Fahrenheit and dew point 47.7, 38 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 6,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNGC1FIG. B THE AIR AT HENNINGER FLATSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,0008,00030 F40 F50 F60 F70 F80 F90 FSATURATES 6,200 FT ABOVE THE STATION, AT 41.7 FTEMPERATURE 75.0 FDEW POINT 47.7 FSPREAD 27.3 FRELATIVE HUMIDITY 38 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 POINTTITLEHenninger Flats, the airSTATION REPORT · DCP HNGC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-09-27IDSR-HNGC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (336 degrees) at 1 mph, gusting 6 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 22 mph.

Plan of the wind at Henninger Flats, north up: blowing from 336 degrees, the north northwest, at 1 miles an hour, gusting 6; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNGC1FIG. C THE WIND AT HENNINGER FLATSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 336°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 1 MPH2LIGHT BREEZE4GUST, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEHenninger Flats, the windSTATION REPORT · DCP HNGC1TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-09-27IDSR-HNGC1-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 2,858 ft above sea level, 10 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.96 inHg and the temperature at 48.8 F; it reports 75.0 F, 26.2 F warmer than standard.

Section from sea level of where Henninger Flats stands in the atmosphere, height to scale: the station 2,858 feet above sea level with 10 per cent of the air below it; the standard atmosphere's pressure there, 26.96 inches of mercury, and temperature, 48.8 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNGC1FIG. D WHERE HENNINGER FLATS STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREHENNINGER FLATS10 PER CENT OF THE AIR BELOW IT2,858 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE26.96 inHgSTANDARD TEMPERATURE HERE48.8 FTEMPERATURE, REPORTED75.0 FTITLEHenninger Flats, the columnSTATION REPORT · DCP HNGC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-09-27IDSR-HNGC1-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Henninger Flats, in 5 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 San Marino

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