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Rio Oso, California

Community in Sutter County, California

Air quality

The air at Rio Oso

Index 45, good, led by fine particles. Read at 11 PM from its reporting area, Lincoln (CA), 14 miles off.

45Good
  • Fine particles (PM2.5)45Good24.7 mi
  • Ozone23Good-
  • Nitrogen dioxide20Good21 ppb24.7 mi
  • Carbon monoxide-0.5 ppm24.7 mi

The days ahead

Highest 58, moderate, today, led by ozone. Yesterday measured 33, good.

Smoke, the next 42 hours

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

FriSat

Precipitation

What has fallen at Rio Oso

None in the last 3 days, to Thu 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 Rio Oso, the next 42 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Rio Oso, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.8 miles away.

measured now4 instruments

LincolnLHM

At an airfield/10.3 mi away/121 ft/74 ft above here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

Nicolaus No2NICC1

At a cooperative observer's station/1.8 mi away/41 ft/6 ft below here

snowfall, snow depth, precip, high, low

Rank-

Yuba City 4.3 SSWCA-SU-6

In a volunteer observer's own ground/10.2 mi away/42 ft/5 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Citizen station GW6725, drawn

The nearest instrument reporting now, 4.1 mi from Rio Oso, California. From its report of undefined: 3 of its 4 sheets.

The wind

From the west southwest (254 degrees) at 2 mph, gusting 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Citizen station GW6725, north up: blowing from 254 degrees, the west southwest, at 2 miles an hour, gusting 3; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW6725FIG. C THE WIND AT CITIZEN STATION GW6725PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 254°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 2 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station GW6725, the windSTATION REPORT · CWOP GW6725TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-GW6725-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 42 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.88 inHg and the temperature at 58.9 F; the station's altimeter setting of 30.02 inHg means its barometer reads 29.97 inHg; it reports 64.0 F, 5.1 F warmer than standard.

Section from sea level of where Citizen station GW6725 stands in the atmosphere, height to scale: the station 42 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.88 inches of mercury, and temperature, 58.9 degrees Fahrenheit; the altimeter setting of 30.02 and the station pressure it means, 29.97.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW6725FIG. D WHERE CITIZEN STATION GW6725 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 ATMOSPHERECITIZEN STATION GW67250 PER CENT OF THE AIR BELOW IT42 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 HERE29.88 inHgSTANDARD TEMPERATURE HERE58.9 FALTIMETER SETTING, REPORTED30.02 inHgITS BAROMETER READS29.97 inHgTEMPERATURE, REPORTED64.0 FTITLECitizen station GW6725, the columnSTATION REPORT · CWOP GW6725TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-GW6725-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 42 degrees above the horizon at 39.01 N, and the day is 11 h 00 min long. Level ground there takes 67 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station GW6725, angles true: on Oct 16 it stands 42 degrees above the horizon, against 74 at the June solstice, 51 at the equinoxes and 28 at the December solstice; the day is 11 h 00 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW6725FIG. E THE SUN AT CITIZEN STATION GW6725ELEVATION 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 74°EQUINOXES 51°DECEMBER SOLSTICE 28°OCT 16, 42°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 00 MINLEVEL GROUND TAKES 67 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.01 N; THE SUN'S DECLINATION -9.1°TITLECitizen station GW6725, the sunSTATION REPORT · CWOP GW6725TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-GW6725-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station GW6725, 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 Rio Oso

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

Near Rio Oso

River and lake gauges