Now. St Clair County International Airport is 61° and mostly cloudy at 2 AM. The dew point is 61°, so the air feels humid and sticky. Light breeze from the south-southwest at 7 mph, gusting to 20 mph.
Today and tonight. It warms to about 65° by 5 AM. Tonight falls to about 38° by 7 AM, under a mostly clear sky. No rain is expected for the rest of the day. Air quality is moderate (index 51): fine for most people, though people unusually sensitive to air pollution may feel it outdoors.
The week. The warmest day ahead is Thursday, near 67°, and the coolest tomorrow, near 53°. Rain is possible tomorrow (37%). Frost is possible tomorrow morning, a low of 35°.
The sky tonight. The sun sets at 6:46 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:32 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 3 minutes long, 3 minutes shorter than yesterday.
As of 2:00 AM in St Clair County International Airport, Michigan.
Air quality
Index 51, moderate, led by fine particles. Read at 1 AM from its reporting area, Southeast (MI), 51 miles off.
Good each day through Today, led by ozone. Yesterday measured 26, good.
No smoke near the ground through Sat 8 PM.
Precipitation
0.02 in in the last 24 hours, 0.36 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.
Visibility
Visibility stays 7 miles or more through Sat 8 PM, lowest 8 miles Fri 3 AM.
F
Now, today, and the week
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 04 / 22 | 5,104 ft | 100 ft | Asphalt | 36° / 216° | - | - |
| 10 / 28 | 4,000 ft | 75 ft | Asphalt | 95° / 275° | - | - |
Measured here
Every hour from Port Huron (PHN), St Clair County International Airport's own instrument, measure by measure, on the field's own clock.
51 F at 8 AM Thursday; 54 F at its warmest, 3 AM Thursday, and 51 F at its coolest, 8 AM Thursday.
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
A dew point of 44 F, the air 76% saturated; the humidity ran from 71% at 5 AM Thursday to 76% at 7 AM Thursday.
How it is measured: Humidity variables, Field Book FB-WAT-002
3 mph from the east northeast at 8 AM Thursday; at its strongest 8 mph, 4 AM Thursday, and no gust reported.
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
30.23 inHg at 8 AM Thursday, steady over 3 hours; 0.01 inHg higher than a day before.
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
10 miles or more every hour.
How it is measured: Fog types, Field Book FB-WAT-020
The lowest cloud base came down to 2,000 ft at 5 AM Thursday; a base was reported in 6 of the hours.
How it is measured: Cloud classification, Field Book FB-SKY-001
None measured in the gauge in the last 24 hours.
How it is measured: ASOS, Field Book FB-INS-002
Port Huron: every reading, the last 7 days, 30 days and the year, and how well it reports
The 5 instruments nearest St Clair County International Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.0 miles away.
measured now3 instruments
Port HuronPHN
At an airfield/0.0 mi away/650 ft/level with here
temp, wind, gust, visibility, precip, pressure
M-1MC130
Beside a road/18.8 mi away/604 ft/46 ft below here
temp, pavement temp, wind, visibility, precip
At a river or reservoir gauge/20.3 mi away/577 ft/73 ft below here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Marysville 0.4 NNEMI-SC-28
In a volunteer observer's own ground/2.6 mi away/610 ft/40 ft below here
precip, snowfall, snow depth
Port HuronPRHM4
At a cooperative observer's station/7.6 mi away/541 ft/109 ft below here
snowfall, snow depth, precip, high, low
0in
Snow on the ground
Measured at Port Huron (PRHM4), 7.6 miles from here, read 13 Oct, 23:59. measured daily
66 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.