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Johnstown, Colorado

Town in Weld County, Colorado

Air quality

The air at Johnstown

Index 27, good, led by ozone. Read at 9 PM from its reporting area, Fort Collins (CO), 12 miles off.

27Good
  • Ozone27Good-

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 37, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Johnstown

0.22 in in the last 24 hours, 0.73 in over the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.22in
Last 3 days
0.73in

Visibility

How far you can see at Johnstown, the next 45 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Johnstown, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 8 instruments nearest Johnstown, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now6 instruments

Nunn 7 NNE94074

At a climate reference station/33.3 mi away/5,390 ft/458 ft above here

temp, humidity, wind, solar, precip

Rank1,732of 2,650

CperS2197

At a soil climate station/35.5 mi away/5,330 ft/398 ft above here

temp, humidity, soil temp, soil moisture

Rank1,757of 2,650

measured daily2 instruments

Johnstown 0.2 ECO-WE-234

In a volunteer observer's own ground/1.0 mi away/4,915 ft/17 ft below here

precip, snowfall, snow depth

Rank-

BerthoudERTC2

At a cooperative observer's station/8.1 mi away/5,043 ft/111 ft above here

snowfall, snow depth, precip, high, low

Rank1,550of 2,650

Station report

The weather at Fort Collins (AWOS), drawn

The nearest airport reporting now, 8.7 mi from Johnstown, Colorado. From its report of Oct 15, 2026, 9:56 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 Fort Collins (AWOS), 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 FNLFIG. A THE SKY OVER FORT COLLINS (AWOS)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 MORE0510TITLEFort Collins (AWOS), the skySTATION REPORT · ASOS FNLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-FNL-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

46.0 F with a dew point of 31.0 F, 56 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,400 ft up.

Chart of the air at Fort Collins (AWOS): temperature 46.0 degrees Fahrenheit and dew point 31.0, 56 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FNLFIG. B THE AIR AT FORT COLLINS (AWOS)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 STATION01,0002,0003,0004,0005,00020 F30 F40 F50 F60 FSATURATES 3,400 FT ABOVE THE STATION, AT 27.9 FTEMPERATURE 46.0 FDEW POINT 31.0 FSPREAD 15.0 FRELATIVE HUMIDITY 56 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 POINTTITLEFort Collins (AWOS), the airSTATION REPORT · ASOS FNLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-FNL-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (10 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 36 mph.

Plan of the wind at Fort Collins (AWOS), north up: blowing from 10 degrees, the north, at 12 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FNLFIG. C THE WIND AT FORT COLLINS (AWOS)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 10°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFort Collins (AWOS), the windSTATION REPORT · ASOS FNLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-FNL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Fort Collins (AWOS), in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Berthoud (ERTC2), 8.1 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Colorado

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

Near Johnstown

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

Near Johnstown

River and lake gauges