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Guilford, Maine

Community in Piscataquis County, Maine

Air quality

The air at Guilford

Index 39, good, led by fine particles. Read at 2 AM from its reporting area, Eastern Interior (ME), 47 miles off.

39Good
  • Fine particles (PM2.5)39Good-
  • Ozone21Good-
  • Coarse particles (PM10)28Good-

The days ahead

Good each day through Tue Oct 20, led by ozone. Yesterday measured 24, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Guilford

None in the last 24 hours; 1.55 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
1.55in

Visibility

How far you can see at Guilford, the next 42 hours

Dense fog: visibility falls to 0.1 miles Fri 5 PM, under a mile for 3 hours.

FriSat

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

What is measuring near here

The 7 instruments nearest Guilford, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.9 miles away.

measured now5 instruments

GreenvilleGNR

At an airfield/22.6 mi away/1,037 ft/630 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1of 422

EtnaME009

Beside a road/29.9 mi away/299 ft/108 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Old Town 2 W94644

At a climate reference station/37.8 mi away/127 ft/280 ft below here

temp, humidity, wind, solar, precip

Rank241of 422

measured daily2 instruments

Sangerville 1.4 SEME-PS-4

In a volunteer observer's own ground/2.9 mi away/636 ft/229 ft above here

precip, snowfall, snow depth

Rank-

East SangervilleESGM1

At a cooperative observer's station/5.7 mi away/666 ft/259 ft above here

snowfall, snow depth, precip, high, low

Rank419of 422

Station report

The weather at Greenville, drawn

The nearest airport reporting now, 22.6 mi from Guilford, Maine. From its report of Oct 16, 2026, 2:56 AM local time: 3 of its 5 sheets.

The air

37.0 F with a dew point of 31.0 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at Greenville: temperature 37.0 degrees Fahrenheit and dew point 31.0, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GNRFIG. B THE AIR AT GREENVILLETHE 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 F50 FSATURATES 1,400 FT ABOVE THE STATION, AT 29.7 FTEMPERATURE 37.0 FDEW POINT 31.0 FSPREAD 6.0 FRELATIVE HUMIDITY 79 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 POINTTITLEGreenville, the airSTATION REPORT · ASOS GNRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-GNR-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Greenville, 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 GNRFIG. C THE WIND AT GREENVILLEPLAN, 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 FORCE73TITLEGreenville, the windSTATION REPORT · ASOS GNRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-GNR-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The column

At 1,037 ft above sea level, 4 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.82 inHg and the temperature at 55.3 F; the station's altimeter setting of 30.06 inHg means its barometer reads 28.95 inHg; it reports 37.0 F, 18.3 F colder than standard.

Section from sea level of where Greenville stands in the atmosphere, height to scale: the station 1,037 feet above sea level with 4 per cent of the air below it; the standard atmosphere's pressure there, 28.82 inches of mercury, and temperature, 55.3 degrees Fahrenheit; the altimeter setting of 30.06 and the station pressure it means, 28.95.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GNRFIG. D WHERE GREENVILLE 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 ATMOSPHEREGREENVILLE4 PER CENT OF THE AIR BELOW IT1,037 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 HERE28.82 inHgSTANDARD TEMPERATURE HERE55.3 FALTIMETER SETTING, REPORTED30.06 inHgITS BAROMETER READS28.95 inHgTEMPERATURE, REPORTED37.0 FTITLEGreenville, the columnSTATION REPORT · ASOS GNRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-GNR-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Greenville, in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at East Sangerville (ESGM1), 5.7 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Maine

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

Near Guilford

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

Near Guilford

River and lake gauges