KMTH TAF

Terminal aerodrome forecast for The Florida Keys Marathon International (MTH · KMTH), Marathon, FL. Issued 20 Sep 2026 2322Z, valid 0000Z to 0000Z, decoded period by period below. · Open on the map

All of The Florida Keys Marathon International — runways, frequencies, charts and live weather

TAF issued 20 Sep 2026 2322Z

valid 0000Z to 0000Z

TAF KMTH 202322Z 2100/2124 VRB04KT P6SM VCTS SCT025CB BKN050 TEMPO 2100/2101 VRB10G20KT 2SM TSRA SCT010 BKN020CB FM211200 21007KT P6SM VCSH FEW025 OVC120

Times are UTC (Zulu), as they appear in the bulletin.

Period by period

Period (UTC)	Change	Wind	Vis	Ceiling	Sky	Cat
0000Z to 1200Z	Initial	Variable at 4 kt	6+ SM	5,000 ft BKN	Scattered at 2,500 ft AGL, Broken at 5,000 ft AGL	VFR
0000Z to 0100Z	TEMPO	Variable at 10-20 kt	2 SM	2,000 ft BKN	Scattered at 1,000 ft AGL, Broken at 2,000 ft AGL	IFR
1200Z to 0000Z	FM	210° at 7 kt	6+ SM	12,000 ft OVC	Few at 2,500 ft AGL, Overcast at 12,000 ft AGL	VFR

What the change groups mean

TEMPO: Temporary — expected for less than half the period, in spells under an hour.
FM: From — a rapid, permanent change to the conditions that follow.

What the categories mean

VFR: Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.
IFR: Instrument flight rules — ceiling 500 to 999 ft and/or visibility 1 to less than 3 SM.

Frequently asked

What is the current TAF for KMTH?

The forecast issued 20 Sep 2026 2322Z for The Florida Keys Marathon International reads: TAF KMTH 202322Z 2100/2124 VRB04KT P6SM VCTS SCT025CB BKN050 TEMPO 2100/2101 VRB10G20KT 2SM TSRA SCT010 BKN020CB FM211200 21007KT P6SM VCSH FEW025 OVC120

How far ahead does a TAF forecast?

A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.

What do FM, BECMG and TEMPO mean?

FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.

More about KMTH

Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.

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