Storm Station
St. Clair, Michigan
48° 71°/46°
Clear· Feels like 46°·Light breeze 5 mph NW
Mostly clear, with a low around 51. North wind around 3 mph.
0UV Low
-Air quality
90%Humidity
7%Cloud
Now
5:00 AM
48feels46
now, clear
Today
Sep 27
7146
13mph
partly cloudy day
Mon
Sep 28
7251
13mph
overcast
Tue
Sep 29
7754
overcast
Wed
Sep 30
6858
overcast
Thu
Oct 1
8564
46%
19mph
showers light
Fri
Oct 2
6449
46%
13mph
drizzle light
Sat
Oct 3
6642
17%
overcast
48°
71°46°
72°51°
77°54°
68°58°
85°64°
64°49°
66°42°

As of 5:00 AM in St. Clair, Michigan.

What is measuring near here

The 5 instruments nearest St. Clair, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now3 instruments

Port HuronPHN

At an airfield/6.2 mi away/650 ft/32 ft above here

temp, wind, gust, visibility, precip, pressure

Rank22of 407

Algonac - St Clair RiverALGM4

At a river or reservoir gauge/14.5 mi away/577 ft/41 ft below here

temp, wind, gust, humidity, pressure

Rank247of 407

M-1MC130

Beside a road/16.4 mi away/604 ft/14 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

St. Clair 0.4 SMI-SC-23

In a volunteer observer's own ground/0.5 mi away/588 ft/30 ft below here

precip, snowfall, snow depth

Rank-

Port HuronPRHM4

At a cooperative observer's station/11.6 mi away/541 ft/77 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Port Huron, drawn

The nearest airport reporting now, 6.2 mi from St. Clair. From its report of Sep 27, 2026, 4:56 AM 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 Port Huron, 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 PHNFIG. A THE SKY OVER PORT HURONSECTION, 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 MORE0510TITLEPort Huron, the skySTATION REPORT · ASOS PHNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-PHN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

50.0 F with a dew point of 46.4 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up.

Chart of the air at Port Huron: temperature 50.0 degrees Fahrenheit and dew point 46.4, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PHNFIG. B THE AIR AT PORT HURONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 800 FT ABOVE THE STATION, AT 45.6 FTEMPERATURE 50.0 FDEW POINT 46.4 FSPREAD 3.6 FRELATIVE HUMIDITY 87 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 POINTTITLEPort Huron, the airSTATION REPORT · ASOS PHNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-PHN-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Port Huron, north up: blowing from 310 degrees, the northwest, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PHNFIG. C THE WIND AT PORT HURONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPort Huron, the windSTATION REPORT · ASOS PHNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-PHN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Michigan

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

Near St. Clair

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