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Chelsea, Michigan

City in Washtenaw County, Michigan

Air quality

The air at Chelsea

Index 35, good, led by fine particles. Read at 1 AM from its reporting area, Jackson (MI), 26 miles off.

35Good
  • Fine particles (PM2.5)35Good22 mi
  • Ozone14Good-
  • Coarse particles (PM10)9Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 22, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Chelsea

0.08 in in the last 24 hours, 0.09 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.08in
Last 3 days
0.09in

Visibility

How far you can see at Chelsea, the next 43 hours

Visibility stays 7 miles or more through Sat 8 PM, lowest 8 miles Fri 2 AM.

FriSat

On the radar over Chelsea, MichiganReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Chelsea, 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 now4 instruments

Ann ArborARB

At an airfield/15.7 mi away/823 ft/100 ft below here

temp, wind, gust, visibility, precip, pressure

Rank214of 979

I96Mm1529MC208

Beside a road/23.3 mi away/899 ft/24 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Adrian [CCOOP]ARNM4

At a river or reservoir gauge/27.5 mi away/738 ft/185 ft below here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

ChelseaCHLM4

At a cooperative observer's station/0.3 mi away/932 ft/9 ft above here

snowfall, snow depth, precip, high, low

Rank556of 979

Chelsea 0.4 NEMI-WS-17

In a volunteer observer's own ground/0.4 mi away/917 ft/6 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Ann Arbor, drawn

The nearest airport reporting now, 15.7 mi from Chelsea, Michigan. From its report of Oct 16, 2026, 1:53 AM local time: 3 of its 3 sheets.

The column

At 823 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.04 inHg and the temperature at 56.1 F; the station's altimeter setting of 29.68 inHg means its barometer reads 28.81 inHg.

Section from sea level of where Ann Arbor stands in the atmosphere, height to scale: the station 823 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 29.04 inches of mercury, and temperature, 56.1 degrees Fahrenheit; the altimeter setting of 29.68 and the station pressure it means, 28.81.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARBFIG. D WHERE ANN ARBOR 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 ATMOSPHEREANN ARBOR3 PER CENT OF THE AIR BELOW IT823 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 HERE29.04 inHgSTANDARD TEMPERATURE HERE56.1 FALTIMETER SETTING, REPORTED29.68 inHgITS BAROMETER READS28.81 inHgTITLEAnn Arbor, the columnSTATION REPORT · ASOS ARBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 3DATE2026-10-16IDSR-ARB-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 39 degrees above the horizon at 42.22 N, and the day is 10 h 53 min long. Level ground there takes 63 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Ann Arbor, angles true: on Oct 16 it stands 39 degrees above the horizon, against 71 at the June solstice, 48 at the equinoxes and 24 at the December solstice; the day is 10 h 53 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARBFIG. E THE SUN AT ANN ARBORELEVATION 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 71°EQUINOXES 48°DECEMBER SOLSTICE 24°OCT 16, 39°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 53 MINLEVEL GROUND TAKES 63 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 42.22 N; THE SUN'S DECLINATION -9.1°TITLEAnn Arbor, the sunSTATION REPORT · ASOS ARBTYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 2 of 3DATE2026-10-16IDSR-ARB-2DRAWN AS linework on paperSOURCES FB-ENG-007

The instrument

An airport station, 823 ft above sea level. Its report of Oct 16, 2026, 1:53 AM local time is written on the sensors that made it.

Elevation of an airport station, Ann Arbor, each sensor drawn and labelled with what it read: barometers, in the shelter, altimeter 29.68 inhg.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARBFIG. F THE INSTRUMENTELEVATION OF AN AIRPORT STATION, EACH SENSOR WITH WHAT IT READ, OCT 16, 2026, 1:53 AM LOCAL TIMEBAROMETERS, IN THE SHELTERALTIMETER 29.68 inHgHEATED RAIN GAUGE-VISIBILITY SENSOR, 7 FT-BEAMCEILOMETER, LOOKING UP-TEMPERATURE IN ITS SHIELD, 5 FT-WIND, 33 FT-33 FT5 FTHEIGHTS TO SCALE; THE SPACING BETWEEN SENSORS IS NOTTITLEAnn Arbor, the instrumentSTATION REPORT · ASOS ARBTYPEELEVATIONSCALEPARTLY TO SCALEREVAS REPORTED SHEET 3 of 3DATE2026-10-16IDSR-ARB-3DRAWN AS linework on paperSOURCES FB-INS-002, FB-INS-001, FB-INS-009

The full report of Ann Arbor, in 3 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Chelsea (CHLM4), 0.3 miles from here, read 14 Oct, 09:30. measured daily

Elsewhere in Michigan

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

Near Chelsea

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

Near Chelsea

River and lake gauges