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Rochester, New Hampshire

City in Strafford County, New Hampshire

Air quality

The air at Rochester

Index 19, good, led by ozone. Read at 10 PM from its reporting area, Coastal Rockingham County (NH), 22 miles off.

19Good
  • Fine particles (PM2.5)13Good19.1 mi
  • Ozone19Good4 ppb19.1 mi
  • Coarse particles (PM10)6Good19.1 mi
  • Sulfur dioxide1Good1.6 ppb19.1 mi

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 21, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 2 PM.

FriSat

Precipitation

What has fallen at Rochester

None in the last 24 hours; 0.61 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
0.61in

Visibility

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

Dense fog: visibility falls to 0.1 miles Fri 2 PM, under a mile for 2 hours.

FriSat

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

What is measuring near here

The 7 instruments nearest Rochester, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

Durham 2 N54794

At a climate reference station/9.6 mi away/119 ft/107 ft below here

temp, humidity, wind, solar, precip

Rank206of 385

measured daily2 instruments

Rochester 0.2 NNWNH-ST-5

In a volunteer observer's own ground/0.3 mi away/223 ft/3 ft below here

precip, snowfall, snow depth

Rank-

DurhamDURN3

At a cooperative observer's station/10.6 mi away/112 ft/114 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Rochester (Was 6B1), drawn

The nearest airport reporting now, 3.1 mi from Rochester, New Hampshire. From its report of Oct 15, 2026, 9:51 PM 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 Rochester (Was 6B1), 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 DAWFIG. A THE SKY OVER ROCHESTER (WAS 6B1)SECTION, 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 MORE0510TITLERochester (Was 6B1), the skySTATION REPORT · ASOS DAWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-DAW-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

41.0 F with a dew point of 39.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up.

Chart of the air at Rochester (Was 6B1): temperature 41.0 degrees Fahrenheit and dew point 39.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DAWFIG. B THE AIR AT ROCHESTER (WAS 6B1)THE 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 500 FT ABOVE THE STATION, AT 38.5 FTEMPERATURE AND DEW POINT 41.0 F, 39.0 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 POINTTITLERochester (Was 6B1), the airSTATION REPORT · ASOS DAWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-DAW-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 Rochester (Was 6B1), 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 DAWFIG. C THE WIND AT ROCHESTER (WAS 6B1)PLAN, 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 FORCE73TITLERochester (Was 6B1), the windSTATION REPORT · ASOS DAWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-DAW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Rochester (Was 6B1), in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in New Hampshire

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

Near Rochester

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

Near Rochester

River and lake gauges