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St. Martin, Ohio

Community in Brown County, Ohio

Air quality

The air at St. Martin

Index 23, good, led by fine particles. Read at 7 PM from its reporting area, Cincinnati (OH), 35 miles off.

23Good
  • Fine particles (PM2.5)23Good-
  • Ozone16Good-

The days ahead

Highest 55, moderate, Mon Oct 19, led by fine particles. Yesterday measured 52, moderate.

Smoke, the next 44 hours

No smoke near the ground through Sun 2 PM.

FriSatSun

Precipitation

What has fallen at St. Martin

0.07 in in the last 24 hours, 0.25 in over the last 3 days, to Fri 6 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.07in
Last 3 days
0.25in

Visibility

How far you can see at St. Martin, the next 44 hours

Visibility stays 7 miles or more through Sun 2 PM, lowest 7 miles Sat 12 AM.

FriSatSun

On the radar over St. Martin, OhioReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. Martin, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.3 miles away.

measured now4 instruments

WilmingtonILN

At an airfield/14.7 mi away/1,056 ft/90 ft above here

temp, wind, gust, visibility, precip, pressure

Rank12of 1,590

AmeliaAMEO1

At a river or reservoir gauge/22.4 mi away/877 ft/89 ft below here

temp, wind, gust, humidity, pressure

Rank1,093of 1,590

measured daily2 instruments

Fayetteville 0.1 WNWOH-BR-20

In a volunteer observer's own ground/3.3 mi away/940 ft/26 ft below here

precip, snowfall, snow depth

Rank-

HillsboroHILO1

At a cooperative observer's station/14.3 mi away/1,086 ft/120 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Wilmington, drawn

The nearest airport reporting now, 14.7 mi from St. Martin, Ohio. From its report of Oct 16, 2026, 7:13 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,300 ft, overcast at 5,000 ft; the ceiling is 1,300 ft; visibility 10 mi or more.

Section of the sky over Wilmington, height above the station to scale: broken cloud with its base at 1,300 feet, overcast cloud with its base at 5,000 feet, the ceiling at 1,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ILNFIG. A THE SKY OVER WILMINGTONSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 5,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,300 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWilmington, the skySTATION REPORT · ASOS ILNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ILN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

49.0 F with a dew point of 47.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Wilmington: temperature 49.0 degrees Fahrenheit and dew point 47.0, 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, against the lowest cloud reported at 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ILNFIG. B THE AIR AT WILMINGTONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATES 500 FT ABOVE THE STATION, AT 46.5 FLOWEST CLOUD REPORTED, BKN 1,300 FTTEMPERATURE AND DEW POINT 49.0 F, 47.0 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 POINTTITLEWilmington, the airSTATION REPORT · ASOS ILNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ILN-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 29 mph.

Plan of the wind at Wilmington, north up: blowing from 280 degrees, the west, 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 ILNFIG. C THE WIND AT WILMINGTONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWilmington, the windSTATION REPORT · ASOS ILNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ILN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Ohio

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

Near St. Martin

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

Near St. Martin

River and lake gauges