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Amherst, New Hampshire

Community in Hillsborough County, New Hampshire

Air quality

The air at Amherst

Index 31, good, led by ozone. Read at 1 AM from its reporting area, Hillsborough County (NH), 6 miles off.

31Good
  • Fine particles (PM2.5)9Good12.6 mi
  • Ozone31Good34 ppb12.6 mi
  • Coarse particles (PM10)3Good12.6 mi
  • Nitrogen dioxide3Good3.8 ppb12.7 mi
  • Sulfur dioxide0Good0.1 ppb12.6 mi
  • Carbon monoxide-0.2 ppm12.7 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 7, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Amherst

None in the last 24 hours; 1.25 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
1.25in

Visibility

How far you can see at Amherst, the next 43 hours

Dense fog: visibility falls to 0.2 miles Fri 10 AM, under a mile for 2 hours.

FriSat

On the radar over Amherst, New HampshireReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Amherst, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now5 instruments

LyndeboroughLYNN3

At a river or reservoir gauge/9.6 mi away/853 ft/589 ft above here

temp, wind, gust, humidity, pressure

Rank202of 385

Durham 2 SSW54795

At a climate reference station/38.3 mi away/63 ft/201 ft below here

temp, humidity, wind, solar, precip

Rank207of 385

measured daily2 instruments

East MilfordEMLN3

At a cooperative observer's station/2.5 mi away/226 ft/38 ft below here

snowfall, snow depth, precip, high, low

Rank53of 385

Milford 0.8 ESENH-HL-94

In a volunteer observer's own ground/2.5 mi away/324 ft/60 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Nashua/Boire Field, drawn

The nearest airport reporting now, 7.9 mi from Amherst, New Hampshire. From its report of Oct 16, 2026, 12:56 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Nashua/Boire Field, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ASHFIG. A THE SKY OVER NASHUA/BOIRE FIELDSECTION, 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 DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLENashua/Boire Field, the skySTATION REPORT · ASOS ASHTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ASH-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

41.0 F with a dew point of 40.0 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up.

Chart of the air at Nashua/Boire Field: temperature 41.0 degrees Fahrenheit and dew point 40.0, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ASHFIG. B THE AIR AT NASHUA/BOIRE FIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 FSATURATES 200 FT ABOVE THE STATION, AT 39.7 FTEMPERATURE AND DEW POINT 41.0 F, 40.0 FRELATIVE HUMIDITY 96 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 POINTTITLENashua/Boire Field, the airSTATION REPORT · ASOS ASHTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ASH-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Nashua/Boire Field, 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 ASHFIG. C THE WIND AT NASHUA/BOIRE FIELDPLAN, 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 FORCE73TITLENashua/Boire Field, the windSTATION REPORT · ASOS ASHTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ASH-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Nashua/Boire Field, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at East Milford (EMLN3), 2.5 miles from here, read 15 Oct, 07:30. measured daily

Elsewhere in New Hampshire

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

Near Amherst

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

Near Amherst

River and lake gauges