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Calais, Maine

City in Washington County, Maine

Air quality

The air at Calais

Index 23, good, led by fine particles. Read at 12 AM from its reporting area, Downeast Coast (ME), 30 miles off.

23Good
  • Fine particles (PM2.5)23Good-
  • Ozone19Good-

The days ahead

Good each day through Tue Oct 20, led by ozone. Yesterday measured 29, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Calais

None in the last 24 hours; 1.10 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
1.10in

Visibility

How far you can see at Calais, the next 44 hours

Mist or haze: visibility falls to 2 miles Fri 8 PM.

FriSat

On the radar over Calais, MaineReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Calais, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.7 miles away.

measured now3 instruments

measured daily2 instruments

Calais 0.1 EME-WS-33

In a volunteer observer's own ground/0.7 mi away/44 ft/69 ft below here

precip, snowfall, snow depth

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Station report

The weather at Moosehorn National Wildlife Refuge RAWS, drawn

The nearest instrument reporting now, 4.5 mi from Calais, Maine. From its report of Oct 16, 2026, 12:19 AM local time: 3 of its 5 sheets.

The air

31.0 F with a dew point of 29.2 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up.

Chart of the air at Moosehorn National Wildlife Refuge RAWS: temperature 31.0 degrees Fahrenheit and dew point 29.2, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MWRM1FIG. B THE AIR AT MOOSEHORN NATIONAL WILDLIFE REFUGE RAWSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 FSATURATES 400 FT ABOVE THE STATION, AT 28.8 FTEMPERATURE AND DEW POINT 31.0 F, 29.2 FRELATIVE HUMIDITY 93 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 POINTTITLEMoosehorn National Wildlife Refuge RAWS, the airSTATION REPORT · DCP MWRM1TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-MWRM1-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Moosehorn National Wildlife Refuge RAWS, 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 MWRM1FIG. C THE WIND AT MOOSEHORN NATIONAL WILDLIFE REFUGE RAWSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 1 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMoosehorn National Wildlife Refuge RAWS, the windSTATION REPORT · DCP MWRM1TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-MWRM1-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 223 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.68 inHg and the temperature at 58.2 F; it reports 31.0 F, 27.2 F colder than standard.

Section from sea level of where Moosehorn National Wildlife Refuge RAWS stands in the atmosphere, height to scale: the station 223 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.68 inches of mercury, and temperature, 58.2 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MWRM1FIG. D WHERE MOOSEHORN NATIONAL WILDLIFE REFUGE RAWS 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 ATMOSPHEREMOOSEHORN NATIONAL WILDLIFE REFUGE RAWS1 PER CENT OF THE AIR BELOW IT223 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 HERE29.68 inHgSTANDARD TEMPERATURE HERE58.2 FTEMPERATURE, REPORTED31.0 FTITLEMoosehorn National Wildlife Refuge RAWS, the columnSTATION REPORT · DCP MWRM1TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-MWRM1-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Moosehorn National Wildlife Refuge RAWS, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Maine

23 places, each with its own forecast and its own instruments.

Near Calais

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

Near Calais

River and lake gauges