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Lake Don Pedro, California

Community in Mariposa County, California

Air quality

The air at Lake Don Pedro

Index 32, good, led by ozone. Read at 5 AM from its reporting area, Tuolumne County (CA), 22 miles off.

32Good
  • Ozone32Good35 ppb23 mi

The days ahead

Yesterday measured 46, good.

Smoke, the next 43 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 Lake Don Pedro

None in the last 3 days, to Fri 4 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 Lake Don Pedro, the next 43 hours

Visibility stays 10 miles or more through Sat 11 PM.

FriSat

On the radar over Lake Don Pedro, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Lake Don Pedro, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.3 miles away.

measured now5 instruments

measured daily2 instruments

Tracy CarbonaTRAC1

At a cooperative observer's station/2.1 mi away/784 ft/390 ft below here

snowfall, snow depth, precip, high, low

Rank-

Mariposa 3.7 NNWCA-MP-1

In a volunteer observer's own ground/20.6 mi away/2,942 ft/1,768 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Dry Creek Near Coulterville, drawn

The nearest instrument reporting now, 1.3 mi from Lake Don Pedro, California. From its report of Oct 16, 2026, 5:15 AM local time: 3 of its 5 sheets.

The air

61.8 F with a dew point of 30.0 F, 30 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 7,200 ft up.

Chart of the air at Dry Creek Near Coulterville: temperature 61.8 degrees Fahrenheit and dew point 30.0, 30 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 7,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DCUC1FIG. B THE AIR AT DRY CREEK NEAR COULTERVILLETHE 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 F20 F30 F40 F50 F60 F70 FSATURATES 7,200 FT ABOVE THE STATION, AT 23.6 FTEMPERATURE 61.8 FDEW POINT 30.0 FSPREAD 31.8 FRELATIVE HUMIDITY 30 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 POINTTITLEDry Creek Near Coulterville, the airSTATION REPORT · DCP DCUC1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-DCUC1-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (275 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Dry Creek Near Coulterville, north up: blowing from 275 degrees, the west, at 6 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 DCUC1FIG. C THE WIND AT DRY CREEK NEAR COULTERVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 275°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDry Creek Near Coulterville, the windSTATION REPORT · DCP DCUC1TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-DCUC1-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 1,145 ft above sea level, 4 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.70 inHg and the temperature at 54.9 F; it reports 61.8 F, 6.9 F warmer than standard.

Section from sea level of where Dry Creek Near Coulterville stands in the atmosphere, height to scale: the station 1,145 feet above sea level with 4 per cent of the air below it; the standard atmosphere's pressure there, 28.70 inches of mercury, and temperature, 54.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DCUC1FIG. D WHERE DRY CREEK NEAR COULTERVILLE 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 ATMOSPHEREDRY CREEK NEAR COULTERVILLE4 PER CENT OF THE AIR BELOW IT1,145 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 HERE28.70 inHgSTANDARD TEMPERATURE HERE54.9 FTEMPERATURE, REPORTED61.8 FTITLEDry Creek Near Coulterville, the columnSTATION REPORT · DCP DCUC1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-DCUC1-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Dry Creek Near Coulterville, 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 Lake Don Pedro

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

Near Lake Don Pedro

River and lake gauges