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Londonderry, New Hampshire

Community in Rockingham County, New Hampshire

Air quality

The air at Londonderry

Index 12, good, led by fine particles. Read at 10 PM from its reporting area, Interior Rockingham County (NH), 12 miles off.

12Good
  • Fine particles (PM2.5)12Good1.3 mi
  • Ozone11Good7 ppb1.3 mi
  • Coarse particles (PM10)6Good1.3 mi
  • Nitrogen dioxide6Good6 ppb1.3 mi
  • Sulfur dioxide0Good0.8 ppb1.3 mi
  • Carbon monoxide-0.2 ppm1.3 mi

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 29, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 2 PM.

FriSat

Precipitation

What has fallen at Londonderry

None in the last 24 hours; 0.45 in over the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.45in

Visibility

How far you can see at Londonderry, the next 41 hours

Fog: visibility falls to 0.7 miles Fri 1 PM, under a mile for 2 hours.

FriSat

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

What is measuring near here

The 7 instruments nearest Londonderry, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now5 instruments

Derry I-93NHDRY

Beside a road/1.4 mi away/247 ft/60 ft below here

temp, pavement temp, wind, visibility, precip

Rank360of 385

SandownSANN3

At a river or reservoir gauge/11.9 mi away/246 ft/61 ft below here

temp, wind, gust, humidity, pressure

Rank96of 385

Durham 2 SSW54795

At a climate reference station/27.2 mi away/63 ft/244 ft below here

temp, humidity, wind, solar, precip

Rank207of 385

measured daily2 instruments

Londonderry 1.8 NENH-RC-107

In a volunteer observer's own ground/1.8 mi away/262 ft/45 ft below here

precip, snowfall, snow depth

Rank-

Hudson 1SSEHUDN3

At a cooperative observer's station/5.5 mi away/236 ft/71 ft below here

snowfall, snow depth, precip, high, low

Rank382of 385

Station report

The weather at Manchester Airpark, drawn

The nearest airport reporting now, 6.8 mi from Londonderry, New Hampshire. From its report of Oct 15, 2026, 9:53 PM local time: 3 of its 6 sheets.

The sky

Scattered at 25,000 ft; visibility 10 mi or more.

Section of the sky over Manchester Airpark, height above the station to scale: scattered cloud with its base at 25,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHTFIG. A THE SKY OVER MANCHESTER AIRPARKSECTION, 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 STATION05,00010,00015,00020,00025,00030,00035,00040,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTSCT 25,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEManchester Airpark, the skySTATION REPORT · ASOS MHTTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MHT-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-010, FB-SKY-011, FB-SKY-012

The air

43.0 F with a dew point of 37.0 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; the lowest cloud reported is at 25,000 ft.

Chart of the air at Manchester Airpark: temperature 43.0 degrees Fahrenheit and dew point 37.0, 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, against the lowest cloud reported at 25,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHTFIG. B THE AIR AT MANCHESTER AIRPARKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00020 F30 F40 F50 FSATURATES 1,400 FT ABOVE THE STATION, AT 35.6 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, SCT 25,000 FTTEMPERATURE 43.0 FDEW POINT 37.0 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 POINTTITLEManchester Airpark, the airSTATION REPORT · ASOS MHTTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MHT-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Manchester Airpark, 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 MHTFIG. C THE WIND AT MANCHESTER AIRPARKPLAN, 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 FORCE73TITLEManchester Airpark, the windSTATION REPORT · ASOS MHTTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MHT-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Manchester Airpark, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Hudson 1SSE (HUDN3), 5.5 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in New Hampshire

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

Near Londonderry

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

Near Londonderry

River and lake gauges