St Clair County International Airport
PHN · KPHN · Port Huron, MI · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 09:19 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:52 AM | 09:52Z |
| Sunrise | 06:24 AM | 10:24Z |
| Sunset | 08:48 PM | 00:48Z |
| Evening civil twilight Loggable night begins | 09:19 PM | 01:19Z |
Plan a flight from KPHN
Past 24 hours category · wind · ceiling · visibility trends
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Density altitude today projected curve · departure window · takeoff roll
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 10LEFT traffic
- Heading
- 102° mag · 095° true
- Dimensions
- 4,000 × 75 ft
- TPA
- 1,700 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 4-light PAPI (left) (3°)
- CTAF
- 123.05
Enter the left downwind (heading 282°) on the 45° at 1,700 ft MSL (≈1,000 AGL).
More details — RWY 10
- Threshold elev
- 643 ft
- Markings
- nonprecision
- Approach obstacle
- Tree, 71 ft, 1,386 ft from threshold, 250 ft L of centerline — 16:1 slope to clear · penetrates the 20:1 visual approach surface
- Threshold crossing height
- 26 ft
- TDZ elevation
- 647 ft
- End lights
- REIL
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 04/22 | 5,104 ft | |
| 10/28 | 4,000 ft |
Prefer one flat page? Full runway details for KPHN → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the KPHN kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
Taxi & takeoff
Departure & arrival
“Selfridge”Also
ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).
By procedure & sector (2 frequencies)
| Frequency | Used by |
|---|---|
| 285.525 | ALGONAC RCAG (HIGH) |
| 391.9 | APCH/P DEP/P |
Source: FAA NASR (current 28-day cycle).
Instrument landing systems
RWY 04
| Runway | ILS |
|---|---|
| RWY 04 | ILS · CAT I · LOC 110.9 (PHN) · GS 3.00° |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
ECK 114.00 · MTC 133.70
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| ECK · Peck | TACAN | 114.00 · 87X | — | r165° / 22.3 NM |
| MTC · Selfridge | TACAN | 133.70 · 64X | — | r043° / 22.3 NM |
Prefer one flat list? All KPHN frequencies →
Charts & procedures
Lowest minimums here: ILS with vertical guidance · VFR sectional →
Airport info
From the field
Do you run KPHN, or an FBO, flight school, or shop on it? Claim your listing to keep fuel, fees, hours, and services current.
Airport information
- ICAO / IATA
- KPHN / PHN
- Coordinates
- 42.9110, -82.5289
- Elevation
- 650 ft MSL
- Magnetic variation
- 7W
- Sectional chart
- DETROIT
- Airport use
- Public
- Control tower
- No
- Weather station
- AWOS-3P · 118.375 · ☎ 810-364-7787
- ARTCC
- CLEVELAND (ZOB)
- Flight service (FSS)
- LANSING · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- PHN
- Attendance
- ALL 0800-1700
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Customs / AOE
- Yes
- Landing fee
- Yes
- Activated
- 1951/11
- Distance from city
- 5 SW
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT MALSR RWY 04; REIL RWY 22, 10, & 28; PAPI RWY 10 & 28; HIRL RWY 04/22; MIRL RWY 10/28 - CTAF. PAPI RWY 04 & 22 OPR CONSLY. on 123.05 — Chart Supplement ↗
Runway lighting aids — 04: 4-light PAPI (left) + MALSR · 22: 4-light PAPI (left) · 10: 4-light PAPI (left) · 28: 4-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL, Jet A (additive)
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
Ownership & management 2 contacts
Remarks FAA · 5 notes
General
- DEER & LRG BIRDS ON & INVOF ARPT.
- TSATLC FLTS MUST NTFY US CUST AT 810-985-9541 ONE HR PRIOR TO ENTRY INTO THE US. NTFY US DEPT OF AGRICULTURE AT 810-985-6126 & AMGR 24 HRS PRIOR FOR DISPOSAL OF ACFT INTL TRASH.
- FOR CD CTC SELFRIDGE APCH AT 586-239-5706, WHEN APCH CLSD CTC CLEVELAND ARTCC AT 440-774-0224/0490.
Lighting
- ACTVT MALSR RWY 04; REIL RWY 22, 10, & 28; PAPI RWY 10 & 28; HIRL RWY 04/22; MIRL RWY 10/28 - CTAF. PAPI RWY 04 & 22 OPR CONSLY.
Attendance
- UNATNDD MAJOR HOLS.
Embed KPHN weather on your site free widget for schools, clubs & FBOs
Live METAR, flight category, and favored runway for KPHN — paste this into your website's HTML. It updates automatically and stays free.
More widgets — crosswind, E6B, density altitude — on the embed page.
Nearby airports
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Also nearby: MI41 Crystal Airport (private) (5 NM) · 5Y5 David's Landing Airport (7 NM) · D99 Robertson Field (9 NM) · 39G Avoca Airport (9 NM) · MI01 Fasel Field (11 NM) · 2E2 Sharpe's Strip (11 NM)
About KPHN
St Clair County International Airport (PHN · KPHN) is an airport in Port Huron, MI, at 650 ft MSL. It has 2 runways, the longest 5,104 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KPHN, refreshed from the Aviation Weather Center and FAA NASR.
Does KPHN have a control tower?
No. St Clair County International Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at KPHN?
St Clair County International Airport has 2 runways; the longest is 5,104 ft. See the Runways section for headings, surface, and lighting.
Where is KPHN?
St Clair County International Airport is in Port Huron, MI, at an elevation of 650 ft MSL. Coordinates: 42.9110, -82.5289.
Fly out of KPHN often?
Save KPHN as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KPHN in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.