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Rocklin, California

City in Placer County, California

Air quality

The air at Rocklin

Index 50, good, led by coarse particles. Read at 10 PM from its reporting area, Roseville-Rocklin (CA), 2 miles off.

50Good
  • Fine particles (PM2.5)48Good3.7 mi
  • Ozone31Good41 ppb3.7 mi
  • Coarse particles (PM10)50Good3.7 mi
  • Nitrogen dioxide9Good10.9 ppb3.7 mi
  • Carbon monoxide-0.3 ppm19.4 mi

The days ahead

Highest 58, moderate, Fri Oct 16, led by ozone. Yesterday measured 39, good.

Smoke, the next 43 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 Rocklin

None in the last 3 days, to Thu 10 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 Rocklin, the next 43 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Rocklin, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

LincolnLICC1

At a river or reservoir gauge/5.4 mi away/197 ft/100 ft below here

temp, wind, gust, humidity, pressure

Rank2,419of 4,465

LincolnLHM

At an airfield/8.7 mi away/121 ft/176 ft below here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

Rocklin 1.4 WCA-PC-40

In a volunteer observer's own ground/0.4 mi away/254 ft/43 ft below here

precip, snowfall, snow depth

Rank-

AuburnAUBC1

At a cooperative observer's station/11.8 mi away/1,312 ft/1,015 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Citizen station KM6WRX, drawn

The nearest instrument reporting now, 3.7 mi from Rocklin, California. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station KM6WRX, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT KM6WRXFIG. C THE WIND AT CITIZEN STATION KM6WRXPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station KM6WRX, the windSTATION REPORT · CWOP KM6WRXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-KM6WRX-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 139 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.77 inHg and the temperature at 58.5 F; the station's altimeter setting of 30.07 inHg means its barometer reads 29.92 inHg; it reports 65.0 F, 6.5 F warmer than standard.

Section from sea level of where Citizen station KM6WRX stands in the atmosphere, height to scale: the station 139 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.77 inches of mercury, and temperature, 58.5 degrees Fahrenheit; the altimeter setting of 30.07 and the station pressure it means, 29.92.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT KM6WRXFIG. D WHERE CITIZEN STATION KM6WRX 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 KM6WRX1 PER CENT OF THE AIR BELOW IT139 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 HERE29.77 inHgSTANDARD TEMPERATURE HERE58.5 FALTIMETER SETTING, REPORTED30.07 inHgITS BAROMETER READS29.92 inHgTEMPERATURE, REPORTED65.0 FTITLECitizen station KM6WRX, the columnSTATION REPORT · CWOP KM6WRXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-KM6WRX-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 38.78 N, and the day is 11 h 01 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 KM6WRX, angles true: on Oct 16 it stands 42 degrees above the horizon, against 75 at the June solstice, 51 at the equinoxes and 28 at the December solstice; the day is 11 h 01 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT KM6WRXFIG. E THE SUN AT CITIZEN STATION KM6WRXELEVATION 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 75°EQUINOXES 51°DECEMBER SOLSTICE 28°OCT 16, 42°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 01 MINLEVEL GROUND TAKES 67 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 38.78 N; THE SUN'S DECLINATION -9.1°TITLECitizen station KM6WRX, the sunSTATION REPORT · CWOP KM6WRXTYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-KM6WRX-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station KM6WRX, 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 Rocklin

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

Near Rocklin

River and lake gauges