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Boonsboro, Maryland

Town in Washington County, Maryland

Air quality

The air at Boonsboro

Index 18, good, led by fine particles. Read at 12 AM from its reporting area, Hagerstown Region (MD), 16 miles off.

18Good
  • Fine particles (PM2.5)18Good5.4 mi
  • Ozone17Good15 ppb5.4 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 42, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Boonsboro

0.05 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.05in

Visibility

How far you can see at Boonsboro, the next 44 hours

Mist or haze: visibility falls to 2 miles Fri 6 PM.

FriSat

On the radar over Boonsboro, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Boonsboro, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

Camp DavidRSP

At an airfield/13.7 mi away/1,841 ft/1,308 ft above here

temp, wind, gust, visibility, precip, pressure

Rank709of 736

measured daily2 instruments

Boonsboro 0.4 NNEMD-WH-17

In a volunteer observer's own ground/0.4 mi away/556 ft/23 ft above here

precip, snowfall, snow depth

Rank-

Hagerstown 1EHGCM2

At a cooperative observer's station/9.4 mi away/541 ft/8 ft above here

snowfall, snow depth, precip, high, low

Rank346of 736

Station report

The weather at IS 70 WB at South Mountain, drawn

The nearest instrument reporting now, 3.2 mi from Boonsboro, Maryland. From its report of Oct 16, 2026, 12:10 AM local time: 3 of its 3 sheets.

The column

At 797 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.07 inHg and the temperature at 56.2 F.

Section from sea level of where IS 70 WB at South Mountain stands in the atmosphere, height to scale: the station 797 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 29.07 inches of mercury, and temperature, 56.2 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD064FIG. D WHERE IS 70 WB AT SOUTH MOUNTAIN STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREIS 70 WB AT SOUTH MOUNTAIN3 PER CENT OF THE AIR BELOW IT797 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.07 inHgSTANDARD TEMPERATURE HERE56.2 FTITLEIS 70 WB at South Mountain, the columnSTATION REPORT · RWIS MD064TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 3DATE2026-10-16IDSR-MD064-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 41 degrees above the horizon at 39.51 N, and the day is 10 h 59 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at IS 70 WB at South Mountain, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 50 at the equinoxes and 27 at the December solstice; the day is 10 h 59 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD064FIG. E THE SUN AT IS 70 WB AT SOUTH MOUNTAINELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 74°EQUINOXES 50°DECEMBER SOLSTICE 27°OCT 16, 41°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 59 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.51 N; THE SUN'S DECLINATION -9.1°TITLEIS 70 WB at South Mountain, the sunSTATION REPORT · RWIS MD064TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 2 of 3DATE2026-10-16IDSR-MD064-2DRAWN AS linework on paperSOURCES FB-ENG-007

The instrument

A road weather station, 797 ft above sea level. Its report of Oct 16, 2026, 12:10 AM local time is written on the sensors that made it.

Elevation of a road weather station, IS 70 WB at South Mountain, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD064FIG. F THE INSTRUMENTELEVATION OF A ROAD WEATHER STATION, EACH SENSOR WITH WHAT IT READ, OCT 16, 2026, 12:10 AM LOCAL TIMETHE ROAD, IN SECTIONPAVEMENT SENSOR, SET IN THE ROAD-PROBE UNDER THE ROAD-AIR TEMPERATURE ON THE TOWER-WIND AT THE TOP OF THE TOWER-SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLEIS 70 WB at South Mountain, the instrumentSTATION REPORT · RWIS MD064TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 3 of 3DATE2026-10-16IDSR-MD064-3DRAWN AS linework on paperSOURCES FB-INS-001

The full report of IS 70 WB at South Mountain, in 3 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Maryland

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

Near Boonsboro

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

Near Boonsboro

River and lake gauges