Union County Airport (KMRT) Aviation Weather: METAR
As of 11:55 AM ET, Oct 27, KMRT is currently VFR with winds from 110° at 4 knots, visibility 6 statute miles, and no ceiling reported.
Live aviation weather for Union County Airport in Marysville, OH, including METAR, flight category, wind, visibility, ceiling, altimeter and runway crosswinds.
Union County Airport (KMRT) is a general aviation airport serving pilots in and around Marysville, OH at a field elevation of 1,021 ft. KMRT reports its own METAR, decoded live on this page as flight category, wind, visibility, ceiling and altimeter. It has 2 physical runways (08/26, 09/27), the longest 4,218 ft. Automated weather is broadcast on 119.275.
Wind from the east-southeast (110°) at 4 kt, visibility 6 statute miles, no cloud data, temperature 17°C (63°F), altimeter 30.35 inHg. Conditions are Visual Flight Rules (VFR).
METAR KMRT 271555Z AUTO 11004KT 6SM HZ CLR 17/14 A3035 RMK AO2
What changed at KMRT?
Since the 1535Z (11:35 AM EDT) report, compared automatically against the latest METAR.
- Haze began (HZ).
- Mist ended (BR).
Current pilot readout for KMRT
KMRT is currently VFR with winds from 110° at 4 knots, visibility 6 statute miles, and no ceiling reported. the wind favors east-facing runway ends (08, 09). Density altitude is approximately 950 ft (field elevation 1,021 ft). KMRT does not publish a TAF. The nearest TAF station is KCMH, about 25 nm away.
KMRT by the numbers
What the long-run records say about flying here, computed for this airport alone.
KMRT reported VFR in 73% of daylight observations over 20 years, about 227 flyable days a year. July is the most reliable month and January the least, with IFR or worse 15% of the time. When conditions drop it is usually low ceilings rather than fog (ceilings under 1,000 ft 8% of hours, visibility under 3 miles 5%).
Over 20 years of hourly winds, runway 27 had the best headwind 70% of the time, runway 09 30%, and winds were calm 21% of hours. Winds most often blow from the west. Crosswind on the best available runway topped 15 kt in 1% of hours.
Seasonal hazards are rare at KMRT: thunderstorms on about 0 days a year, fog on 0 and snow on 0. Wind is the main variable, with gusts in 16% of hours.
Field elevation is 1,021 ft, but on a median summer afternoon the air performs like 2,536 ft, 1,515 ft higher. Plan for a longer takeoff roll and a weaker climb from June to August.
Gusts showed up in 16% of hours, typically 6 kt above the steady wind, and the strongest credible gust on record was 53 kt. January is the windiest month (mean 8 kt) and August the calmest.
Sources: hourly observations 2006 to 2025 and the per-runway wind climatology 2006 to 2025. Historical summaries, not a forecast: check the current METAR, TAF and a briefing before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Runway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 08FAV | 2,522 ft | TURF | 4 kt head | 2 kt right |
| 09 | 4,218 ft | ASP | 4 kt head | 2 kt right |
| 26 | 2,522 ft | TURF | 4 kt tail | 2 kt left |
| 27 | 4,218 ft | ASP | 4 kt tail | 2 kt left |
Open the crosswind calculator to try your own wind and runway numbers →
KMRT runways
2 physical runways · 4 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.
- Status not monitoredRunway 08/262,522 × 80 ft · TURFCurrent useno stated-runway source at KMRTWind
- 08
- 4 kt headwind · 2 kt crosswind from right
- 26
- 4 kt tailwind · 2 kt crosswind from left
no active equipment NOTAM receivedView Runway Intelligence → - Status not monitoredRunway 09/274,218 × 75 ft · ASPCurrent useno stated-runway source at KMRTWind
- 09
- 4 kt headwind · 2 kt crosswind from right
- 27
- 4 kt tailwind · 2 kt crosswind from left
no active equipment NOTAM receivedView Runway Intelligence →
“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 3→4 kt, ceiling unlimited → unlimited.
KMRT weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.
Pilot reports (PIREPs) within 100 NM of KMRT
Reported by pilots in flight over the past 6 hours, via aviationweather.gov.
Show raw report
MIE UA /OV MIE180015/TM 1530/FL280/TP CRJ7/TB CONS LGT CHOP
MIE UAHeader: reporting station and UA: a routine pilot report.OV MIE180015Location: fix or navaid, optionally with a radial and distance in NM.TM 1530Reported at 15:30 UTC.FL280Altitude: 28,000 ft MSL.TP CRJ7Aircraft type reporting.TB CONS LGT CHOPTurbulence: continuous light chop.Show raw report
CMH UA /OV UNI350015/TM 1352/FL050/TP PA24/SK SKC/WX HZ/RM VIS 9-10SM NO CLOUDS
CMH UAHeader: reporting station and UA: a routine pilot report.OV UNI350015Location: fix or navaid, optionally with a radial and distance in NM.TM 1352Reported at 13:52 UTC.FL050Altitude: 5,000 ft MSL.TP PA24Aircraft type reporting.SK SKCSky condition: cloud bases and tops in hundreds of feet MSL.WX HZWeather and flight visibility observed.RM VIS 9-10SM NO CLOUDSRemarks.Show raw report
FWA UA /OV FWA/TM 1318/FL220/TP PC12/TB NEG
FWA UAHeader: reporting station and UA: a routine pilot report.OV FWALocation: fix or navaid, optionally with a radial and distance in NM.TM 1318Reported at 13:18 UTC.FL220Altitude: 22,000 ft MSL.TP PC12Aircraft type reporting.TB NEGTurbulence: none reported.Show raw report
ZZV UA /OV ZZV/TM 1146/FL410/TP E55P/TB LGT
ZZV UAHeader: reporting station and UA: a routine pilot report.OV ZZVLocation: fix or navaid, optionally with a radial and distance in NM.TM 1146Reported at 11:46 UTC.FL410Altitude: 41,000 ft MSL.TP E55PAircraft type reporting.TB LGTTurbulence: light.⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.
Recent aviation weather trends at KMRT
From ATIS Alerts' hourly weather history.
Over the past 24 hours, KMRT reported mostly VFR across 68 observations, with 11 flight-category changes. The lowest ceiling was 0 ft. Wind most often came from the N.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 26/27
- 63%
- 08/09
- 37%
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Live crosswind meter
Measured by KMRT's own weather station.
Wind is 27° off runway 09, the end with the most headwind right now.
Asphalt · 4,218 ft. Headings from FAA runway data. Not for navigation.
Field aerial
North up
Runway 08/26, 09/27 drawn from FAA threshold coordinates.
Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit
Airport info
From the FAA airport record (cycle 2026-10-01) and OurAirports.
Services
- Fuel
- 100LL · Jet A-1 · Jet A-1+
- Attended
- Daily 0800-1700 local
- Repairs
- Airframe & engine, major
- Transient parking
- Tie-downs · Hangars
- Landing fee
- No
- Other services
- Flight instruction · Aircraft rental
- Control tower
- None
- Wind indicator
- Lighted
Airport
- Type
- General aviation airport
- ICAO
- KMRT
- FAA LID
- MRT
- City
- Marysville
- State
- Ohio
- Country
- United States
- Elevation
- 1,021 ft
- Coordinates
- 40.2247, -83.3516
- Runways
- 2 physical runways · 4 runway ends
- Longest runway
- 4,218 ft
- Weather reporting
- Reports METAR
- TAF
- Nearest KCMH
- AWOS/ASOS
- 119.275 MHz
- Time zone
- America/New_York
- Sunset in
- 6h 21m
Run a flight school, FBO, or club here? Embed KMRT's live status on your website, free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
9 airports+3 more within 25 NM
25–50 NM
7 airports+1 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport: live wind, crosswind & flyability on each page.
- Mid Ohio Radio Kontrol Society - Springdale Rd , Marysville, OH · 4 mi
- Mid Ohio Soaring Society - Liberty Road , Delaware, OH · 14 mi
- Mid Ohio Soaring Society - West of YMCA , Powell, OH · 14 mi
Historical Flying Weather at KMRT
2006–2025 · ATIS Alerts Flying Weather Index
Based on historical observations from 2006–2025, KMRT reported VFR conditions during about 73.4% of valid daylight observations, with an estimated 227 VFR flying days a year. July had the most VFR weather; January had the most instrument conditions. Surface winds averaged 6.1 kt, calm 20.1% of the time.
Full historical breakdown
Flight category by month
| Month | VFR % | MVFR % | IFR % | LIFR % |
|---|---|---|---|---|
| Jan | 54.0 | 30.5 | 9.1 | 6.3 |
| Feb | 61.1 | 24.8 | 8.9 | 5.2 |
| Mar | 71.3 | 18.0 | 7.5 | 3.3 |
| Apr | 79.1 | 13.1 | 5.4 | 2.4 |
| May | 80.3 | 11.6 | 5.6 | 2.4 |
| Jun | 81.9 | 11.3 | 4.7 | 2.1 |
| Jul | 83.7 | 11.2 | 3.7 | 1.4 |
| Aug | 81.7 | 11.5 | 4.0 | 2.7 |
| Sep | 78.3 | 11.5 | 6.3 | 3.9 |
| Oct | 76.0 | 14.6 | 6.0 | 3.4 |
| Nov | 72.3 | 18.3 | 6.0 | 3.3 |
| Dec | 54.3 | 30.0 | 9.3 | 6.4 |
Average wind by month
| Month | Mean wind (kt) |
|---|---|
| Jan | 7.6 kt |
| Feb | 7.3 kt |
| Mar | 7.5 kt |
| Apr | 7.4 kt |
| May | 6.1 kt |
| Jun | 5.7 kt |
| Jul | 4.3 kt |
| Aug | 3.8 kt |
| Sep | 4.1 kt |
| Oct | 5.8 kt |
| Nov | 6.8 kt |
| Dec | 6.8 kt |
Historical summary of past observations: not a forecast or safety rating. Always check the current METAR, TAF, and a weather briefing before flight.
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MRT's real runway layout on the back, elevation and tower frequency on the front. Add your tail number on the sleeve.
Pilot PIREPs for Union County Airport (KMRT)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Union County Airport, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for KMRT yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only, not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
No D-ATIS at this airport, showing METAR.
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