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West Menlo Park, California

Community in San Mateo County, California

Air quality

The air at West Menlo Park

Index 29, good, led by fine particles. Read at 5 AM from its reporting area, Redwood City (CA), 4 miles off.

29Good
  • Fine particles (PM2.5)29Good3.7 mi
  • Ozone13Good-

The days ahead

Good each day through Tue Oct 20, led by ozone. Yesterday measured 46, good.

Smoke, the next 43 hours

Little smoke near the ground through Sat 11 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at West Menlo Park

None in the last 3 days, to Fri 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at West Menlo Park, the next 43 hours

Visibility stays 10 miles or more through Sat 11 PM.

FriSat

On the radar over West Menlo Park, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest West Menlo Park, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now3 instruments

measured daily2 instruments

Menlo Park 3.1 WSWCA-SM-40

In a volunteer observer's own ground/2.5 mi away/38 ft/71 ft below here

precip, snowfall, snow depth

Rank-

Redwood CityRWCC1

At a cooperative observer's station/3.5 mi away/16 ft/93 ft below here

snowfall, snow depth, precip, high, low

Rank291of 4,465

Station report

The weather at Redwood City, drawn

The nearest instrument reporting now, 3.5 mi from West Menlo Park, California. From its report of Oct 16, 2026, 5:05 AM local time: 3 of its 4 sheets.

The air

52.4 F with a dew point of 42.9 F, 70 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,200 ft up.

Chart of the air at Redwood City: temperature 52.4 degrees Fahrenheit and dew point 42.9, 70 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWCC1FIG. B THE AIR AT REDWOOD CITYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 2,200 FT ABOVE THE STATION, AT 40.8 FTEMPERATURE 52.4 FDEW POINT 42.9 FSPREAD 9.5 FRELATIVE HUMIDITY 70 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 POINTTITLERedwood City, the airSTATION REPORT · DCP RWCC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-RWCC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 16 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.90 inHg and the temperature at 58.9 F; it reports 52.4 F, 6.5 F colder than standard.

Section from sea level of where Redwood City stands in the atmosphere, height to scale: the station 16 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.90 inches of mercury, and temperature, 58.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWCC1FIG. D WHERE REDWOOD CITY 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 ATMOSPHEREREDWOOD CITY0 PER CENT OF THE AIR BELOW IT16 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 HERE29.90 inHgSTANDARD TEMPERATURE HERE58.9 FTEMPERATURE, REPORTED52.4 FTITLERedwood City, the columnSTATION REPORT · DCP RWCC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-RWCC1-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 43 degrees above the horizon at 37.48 N, and the day is 11 h 03 min long. Level ground there takes 69 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Redwood City, angles true: on Oct 16 it stands 43 degrees above the horizon, against 76 at the June solstice, 53 at the equinoxes and 29 at the December solstice; the day is 11 h 03 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWCC1FIG. E THE SUN AT REDWOOD CITYELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 76°EQUINOXES 53°DECEMBER SOLSTICE 29°OCT 16, 43°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 03 MINLEVEL GROUND TAKES 69 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 37.48 N; THE SUN'S DECLINATION -9.1°TITLERedwood City, the sunSTATION REPORT · DCP RWCC1TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-RWCC1-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Redwood City, in 4 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in California

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

Near West Menlo Park

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

Near West Menlo Park

River and lake gauges