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Porterville, California

City in Tulare County, California

Air quality

The air at Porterville

Index 56, moderate, led by coarse particles. Read at 12 AM from its reporting area, Visalia (CA), 24 miles off.

56Moderate
  • Fine particles (PM2.5)54Moderate-
  • Ozone33Good-
  • Coarse particles (PM10)56Moderate-

The days ahead

Moderate each day through Today, led by ozone. Yesterday measured 67, moderate.

Smoke, the next 42 hours

Little smoke near the ground through Sun 5 PM: the index from smoke stays at 6 or under.

SatSun

Precipitation

What has fallen at Porterville

None in the last 3 days, to Fri 11 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 Porterville, the next 42 hours

Visibility stays 10 miles or more through Sun 5 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Porterville, 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

Success LakeSUWC1

At a river or reservoir gauge/6.6 mi away/655 ft/211 ft above here

temp, wind, gust, humidity, pressure

Rank40of 4,461

measured daily2 instruments

Porterville 2.4 NNWCA-TL-16

In a volunteer observer's own ground/1.6 mi away/422 ft/22 ft below here

precip, snowfall, snow depth

Rank-

LindsayLINC1

At a cooperative observer's station/9.1 mi away/420 ft/24 ft below here

snowfall, snow depth, precip, high, low

Rank2,318of 4,461

Station report

The weather at Porterville, drawn

The nearest airport reporting now, 3.5 mi from Porterville, California. From its report of Oct 16, 2026, 11:56 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Porterville, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTVFIG. A THE SKY OVER PORTERVILLESECTION, 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 STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEPorterville, the skySTATION REPORT · ASOS PTVTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-PTV-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

61.0 F with a dew point of 38.0 F, 42 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 5,200 ft up.

Chart of the air at Porterville: temperature 61.0 degrees Fahrenheit and dew point 38.0, 42 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 5,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTVFIG. B THE AIR AT PORTERVILLETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00020 F30 F40 F50 F60 F70 FSATURATES 5,200 FT ABOVE THE STATION, AT 33.1 FTEMPERATURE 61.0 FDEW POINT 38.0 FSPREAD 23.0 FRELATIVE HUMIDITY 42 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 POINTTITLEPorterville, the airSTATION REPORT · ASOS PTVTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-PTV-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Porterville, north up: at 5 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 PTVFIG. C THE WIND AT PORTERVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPorterville, the windSTATION REPORT · ASOS PTVTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-PTV-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Porterville, 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 Porterville

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

Near Porterville

River and lake gauges