☔ Does It Rain a Lot in Marathon, Florida?

Not really — Marathon is sunny most of the year. On average, it gets about 24 inches (621 mm) of rain annually, usually in brief afternoon showers that pass quickly. Average highs: 84°F (29°C) Average lows: 66°F (19°C) Rainy season: June through October Dry season: November through April Voice Search Answer: 🎤 Marathon Florida gets about 24 inches of rain a year, mostly in short tropical showers during summer.