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Key Largo, Florida

Community in Monroe County, Florida

Air quality

The air at Key Largo

Index 26, good, led by fine particles. Read at 3 PM from its reporting area, Miami (FL), 49 miles off.

26Good
  • Fine particles (PM2.5)26Good-
  • Ozone22Good-
  • Coarse particles (PM10)15Good-

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 29, good.

Smoke, the next 41 hours

No smoke near the ground through Sun 8 AM.

FriSatSun

Precipitation

What has fallen at Key Largo

0.02 in in the last 24 hours, 0.29 in over the last 3 days, to Fri 3 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.02in
Last 3 days
0.29in

Visibility

How far you can see at Key Largo, the next 41 hours

Visibility stays 6 miles or more through Sun 8 AM, lowest 6 miles Sun 8 AM.

FriSatSun

On the radar over Key Largo, FloridaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Key Largo, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

measured daily2 instruments

Key Largo 1.3 ENEFL-MN-20

In a volunteer observer's own ground/0.2 mi away/4 ft/5 ft below here

precip, snowfall, snow depth

Rank-

Key LargoKLPF1

At a cooperative observer's station/1.2 mi away/49 ft/40 ft above here

snowfall, snow depth, precip, high, low

Rank1,315of 2,338

Station report

The weather at Key Largo - Ocean Reef, drawn

The nearest airport reporting now, 17.2 mi from Key Largo, Florida. From its report of Oct 16, 2026, 3:55 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 1,900 ft; visibility 10 mi or more.

Section of the sky over Key Largo - Ocean Reef, height above the station to scale: a few clouds cloud with its base at 1,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT K70FIG. A THE SKY OVER KEY LARGO - OCEAN REEFSECTION, 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 SHEETFEW 1,900 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEKey Largo - Ocean Reef, the skySTATION REPORT · ASOS K70TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-K70-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

91.4 F with a dew point of 80.6 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up; the lowest cloud reported is at 1,900 ft.

Chart of the air at Key Largo - Ocean Reef: temperature 91.4 degrees Fahrenheit and dew point 80.6, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station, against the lowest cloud reported at 1,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT K70FIG. B THE AIR AT KEY LARGO - OCEAN REEFTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00070 F80 F90 F100 FSATURATES 2,500 FT ABOVE THE STATION, AT 77.9 FLOWEST CLOUD REPORTED, FEW 1,900 FTTEMPERATURE 91.4 FDEW POINT 80.6 FSPREAD 10.8 FRELATIVE HUMIDITY 71 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 POINTTITLEKey Largo - Ocean Reef, the airSTATION REPORT · ASOS K70TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-K70-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east southeast (110 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 16 mph.

Plan of the wind at Key Largo - Ocean Reef, north up: blowing from 110 degrees, the east southeast, at 10 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 K70FIG. C THE WIND AT KEY LARGO - OCEAN REEFPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 110°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEKey Largo - Ocean Reef, the windSTATION REPORT · ASOS K70TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-K70-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Key Largo - Ocean Reef, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Florida

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

Near Key Largo

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

Near Key Largo

River and lake gauges