Marathon Weather
Real-time conditions, radar, and the 7-day forecast for Marathon, updated live.
7-day forecast
Marathon radar
Marathon climate
Marathon sits in Monroe (The Keys) County and shares South Florida's warm, humid subtropical climate. Expect a distinct wet season from May through October — when afternoon thunderstorms roll through most days — and a milder, drier season from November through April. Average highs run in the mid-80s°F in summer and the low-to-mid 70s°F in winter, and it virtually never freezes. Atlantic hurricane season runs June 1 through November 30, so keep an eye on tropical forecasts during those months.
Marathon weather FAQ
What's the weather in Marathon today?
Marathon, FL has a warm subtropical climate. Today's live temperature and conditions are shown at the top of this page, updated in real time from Open-Meteo. Marathon typically sees highs in the mid-80s°F in summer and the low-to-mid 70s°F in winter.
Is it going to rain in Marathon?
South Florida's rainy season runs May through October, when brief afternoon thunderstorms are common in Marathon; the dry season from November through April sees far less rain. Check the 7-day forecast above for the current rain outlook and daily precipitation chances.
What's the average temperature in Marathon?
Marathon, FL averages roughly 84°F highs and 70°F lows across the year, with summer highs near 90°F and winter lows occasionally dipping into the 50s°F. Freezes are extremely rare.