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McArthur, California

Community in Shasta County, California

Air quality

The air at McArthur

Index 31, good, led by ozone. Read at 8 PM from its reporting area, Redding (CA), 62 miles off.

31Good
  • Ozone31Good-

The days ahead

Yesterday measured 33, good.

Smoke, the next 45 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 McArthur

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 McArthur, the next 45 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 5 instruments nearest McArthur, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.2 miles away.

measured now3 instruments

Ash ValleyS2214

At a soil climate station/37.2 mi away/5,097 ft/1,782 ft above here

temp, humidity, soil temp, soil moisture

Rank2,547of 4,465

measured daily2 instruments

Fall River MillsFMLC1

At a cooperative observer's station/3.2 mi away/3,278 ft/37 ft below here

snowfall, snow depth, precip, high, low

Rank-

Fall River Mills 6.1 NWCA-SH-84

In a volunteer observer's own ground/5.9 mi away/3,324 ft/9 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at PIT RIVER PH #1 - PG&E, drawn

The nearest instrument reporting now, 6.3 mi from McArthur, California. From its report of Oct 15, 2026, 8:30 PM local time: 3 of its 4 sheets.

The air

73.8 F with a dew point of 32.5 F, 22 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 9,300 ft up.

Chart of the air at PIT RIVER PH #1 - PG&E: temperature 73.8 degrees Fahrenheit and dew point 32.5, 22 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 9,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTHC1FIG. B THE AIR AT PIT RIVER PH #1 - PG&ETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00010 F30 F50 F70 FSATURATES 9,300 FT ABOVE THE STATION, AT 24.1 FTEMPERATURE 73.8 FDEW POINT 32.5 FSPREAD 41.2 FRELATIVE HUMIDITY 22 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 POINTTITLEPIT RIVER PH #1 - PG&E, the airSTATION REPORT · DCP PTHC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-PTHC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 3,035 ft above sea level, 10 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.78 inHg and the temperature at 48.2 F; it reports 73.8 F, 25.6 F warmer than standard.

Section from sea level of where PIT RIVER PH #1 - PG&E stands in the atmosphere, height to scale: the station 3,035 feet above sea level with 10 per cent of the air below it; the standard atmosphere's pressure there, 26.78 inches of mercury, and temperature, 48.2 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTHC1FIG. D WHERE PIT RIVER PH #1 - PG&E 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 ATMOSPHEREPIT RIVER PH #1 - PG&E10 PER CENT OF THE AIR BELOW IT3,035 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 HERE26.78 inHgSTANDARD TEMPERATURE HERE48.2 FTEMPERATURE, REPORTED73.8 FTITLEPIT RIVER PH #1 - PG&E, the columnSTATION REPORT · DCP PTHC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-PTHC1-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 40 degrees above the horizon at 40.99 N, and the day is 10 h 56 min long. Level ground there takes 64 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at PIT RIVER PH #1 - PG&E, angles true: on Oct 16 it stands 40 degrees above the horizon, against 72 at the June solstice, 49 at the equinoxes and 26 at the December solstice; the day is 10 h 56 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTHC1FIG. E THE SUN AT PIT RIVER PH #1 - PG&EELEVATION 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 72°EQUINOXES 49°DECEMBER SOLSTICE 26°OCT 16, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 56 MINLEVEL GROUND TAKES 64 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 40.99 N; THE SUN'S DECLINATION -9.1°TITLEPIT RIVER PH #1 - PG&E, the sunSTATION REPORT · DCP PTHC1TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-PTHC1-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of PIT RIVER PH #1 - PG&E, 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 McArthur

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

Near McArthur

River and lake gauges