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Coloma, California

Community in El Dorado County, California

Air quality

The air at Coloma

Index 34, good, led by ozone. Read at 2 AM from its reporting area, Placerville (CA), 7 miles off.

34Good
  • Fine particles (PM2.5)-16.8 mi
  • Ozone34Good40 ppb16.8 mi
  • Nitrogen dioxide2Good2 ppb16.8 mi

The days ahead

Good each day through Tue Oct 20, led by ozone.

Smoke, the next 46 hours

Little smoke near the ground through Sat 11 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Coloma

None in the last 3 days, to Fri 1 AM. 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 Coloma, the next 46 hours

Visibility stays 10 miles or more through Sat 11 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Coloma, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.8 miles away.

measured now4 instruments

measured daily2 instruments

Kelsey 1NKLSC1

At a cooperative observer's station/3.8 mi away/1,961 ft/1,174 ft above here

snowfall, snow depth, precip, high, low

Rank-

Placerville 6.1 WNWCA-ED-8

In a volunteer observer's own ground/4.4 mi away/1,401 ft/614 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Placerville, drawn

The nearest airport reporting now, 9.0 mi from Coloma, California. From its report of Oct 16, 2026, 2:35 AM local time: 3 of its 5 sheets.

The sky

No cloud reported; visibility 10 mi or more.

Section of the sky over Placerville, height above the station to scale: no cloud reported, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PVFFIG. A THE SKY OVER PLACERVILLESECTION, 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 REPORTEDVISIBILITY, MILES: 10 MI OR MORE0510TITLEPlacerville, the skySTATION REPORT · ASOS PVFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-PVF-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

75.2 F with a dew point of 19.4 F, 12 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 12,400 ft up.

Chart of the air at Placerville: temperature 75.2 degrees Fahrenheit and dew point 19.4, 12 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 12,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PVFFIG. B THE AIR AT PLACERVILLETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00014,00016,0000 F20 F40 F60 F80 FSATURATES 12,400 FT ABOVE THE STATION, AT 8.8 FTEMPERATURE 75.2 FDEW POINT 19.4 FSPREAD 55.8 FRELATIVE HUMIDITY 12 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 POINTTITLEPlacerville, the airSTATION REPORT · ASOS PVFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-PVF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 2,585 ft above sea level, 9 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 27.23 inHg and the temperature at 49.8 F; the station's altimeter setting of 30.19 inHg means its barometer reads 27.47 inHg; it reports 75.2 F, 25.4 F warmer than standard.

Section from sea level of where Placerville stands in the atmosphere, height to scale: the station 2,585 feet above sea level with 9 per cent of the air below it; the standard atmosphere's pressure there, 27.23 inches of mercury, and temperature, 49.8 degrees Fahrenheit; the altimeter setting of 30.19 and the station pressure it means, 27.47.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PVFFIG. D WHERE PLACERVILLE 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 ATMOSPHEREPLACERVILLE9 PER CENT OF THE AIR BELOW IT2,585 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 HERE27.23 inHgSTANDARD TEMPERATURE HERE49.8 FALTIMETER SETTING, REPORTED30.19 inHgITS BAROMETER READS27.47 inHgTEMPERATURE, REPORTED75.2 FTITLEPlacerville, the columnSTATION REPORT · ASOS PVFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-PVF-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Placerville, in 5 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 Coloma

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

Near Coloma

River and lake gauges