Union County Airport
General Aviation Airport · Marysville, OH, United States
Current conditions at Union County Airport. It's 72°F with 43% humidity. Winds from 280° at 5 kt. Skies are clear.
ICAOKMRTIATA—LOCALMRT
Zulu · UTC--:--:--Aviation standard time
Local · UTC-6--:--:--Approx. (from longitude)
Elevation1,021ft311 m
Longest runway4,218ft1,286 m
Runways11 lighted
Coordinates40.22, -83.3540°13'28.9"N 83°21'05.8"W
ClassGeneral AviationNo scheduled service
Current weather
This observation is over an hour old and may not reflect current conditions.
72°F22°C · Dew 48°F — —
280° @ 5 kt
- Visibility10+ sm
- CeilingSky clear
- Humidity43%
- Altimeter30.11 inHg
- Pressure1019.7 hPa
- GustsNone
Runway winds
27★ Best
Headwind5 kt
Crosswind1 kt from R
09
Tailwind5 kt
Crosswind1 kt from L
Wind components are computed from the reported surface wind and true runway headings. Actual runway selection is made by the airport and ATC — always consult official information.
Quick answers
- What is the weather at Union County Airport (KMRT) right now?
- Current conditions at Union County Airport. It's 72°F with 43% humidity. Winds from 280° at 5 kt. Skies are clear. (observed 19:15 UTC)
- Which runway at KMRT has the best headwind right now?
- With the wind from 280° at 5 kt, runway 27 gives a 5 kt headwind and 1 kt crosswind. ATC and the airport choose the runway actually in use.
- How many runways does Union County Airport have?
- Union County Airport has 1 runway; the longest is 4,218 ft (1,286 m). Field elevation is 1,021 ft.
- What are the tower and ATIS frequencies at KMRT?
- AWOS 119.275 MHz (community data — confirm against current charts).
- What time is sunrise and sunset at KMRT?
- On 2026-10-04, sunrise is at 11:33 UTC and sunset at 23:10 UTC; civil twilight ends at 23:38 UTC.
- Are there delays at KMRT right now?
- The FAA currently reports no ground stops, delay programs or closures at KMRT.
Runways
09/27◐ lit
Radio frequencies
AWOS119.275AWOS 3
UNICOM122.80CTAF/UNICOM
Approach120.20COLUMBUS APP/DEP
Frequencies (MHz) come from the OurAirports community dataset and can lag official changes. Confirm against the current chart supplement or AIP before flight.
Nearby navaids
Distance and true bearing from the airport reference point