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Menlo Park, California

City in San Mateo County, California

Air quality

The air at Menlo Park

Index 48, good, led by fine particles. Read at 8 PM from its reporting area, Redwood City (CA), 3 miles off.

48Good
  • Fine particles (PM2.5)48Good2.6 mi
  • Ozone6Good9 ppb2.6 mi
  • Nitrogen dioxide28Good30 ppb2.6 mi
  • Carbon monoxide-0.6 ppm2.6 mi

The days ahead

Good each day through Tue Oct 20, led by ozone. Yesterday measured 40, good.

Smoke, the next 45 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.

FriSat

Precipitation

What has fallen at Menlo Park

None in the last 3 days, to Thu 8 PM. 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 Menlo Park, the next 45 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Menlo Park, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now4 instruments

measured daily2 instruments

Redwood CityRWCC1

At a cooperative observer's station/3.7 mi away/16 ft/52 ft below here

snowfall, snow depth, precip, high, low

Rank291of 4,465

Station report

The weather at Palo Alto Airport, drawn

The nearest airport reporting now, 3.4 mi from Menlo Park, California. From its report of Oct 15, 2026, 8:47 PM local time: 3 of its 6 sheets.

The sky

Clear; visibility 10 mi or more.

Section of the sky over Palo Alto Airport, height above the station to scale: a clear sky, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PAOFIG. A THE SKY OVER PALO ALTO AIRPORTSECTION, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONCLEARVISIBILITY, MILES: 10 MI OR MORE0510TITLEPalo Alto Airport, the skySTATION REPORT · ASOS PAOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PAO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

62.6 F with a dew point of 55.4 F, 77 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,700 ft up.

Chart of the air at Palo Alto Airport: temperature 62.6 degrees Fahrenheit and dew point 55.4, 77 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PAOFIG. B THE AIR AT PALO ALTO AIRPORTTHE 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 1,700 FT ABOVE THE STATION, AT 53.7 FTEMPERATURE 62.6 FDEW POINT 55.4 FSPREAD 7.2 FRELATIVE HUMIDITY 77 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 POINTTITLEPalo Alto Airport, the airSTATION REPORT · ASOS PAOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PAO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Palo Alto Airport, north up: blowing from 310 degrees, the northwest, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PAOFIG. C THE WIND AT PALO ALTO AIRPORTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPalo Alto Airport, the windSTATION REPORT · ASOS PAOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PAO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Palo Alto Airport, in 6 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 Menlo Park

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

Near Menlo Park

River and lake gauges