Climate in Marco Island
Marco Island has a humid subtropical climate: hot, long, humid summers and short, mild, comfortable winters -- with the same hurricane-season overlap that shapes insurance costs and flood exposure across this entire batch of Southwest Florida markets.
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Learn moreTemperature
Average annual temperature runs around 75°F, with monthly highs ranging from about 73°F in January to about 91°F in August, per BestPlaces and Weather-and-Climate.com's monthly averages. Summers are described as long, hot, oppressive, and mostly cloudy, while winters are short, comfortable, windy, and mostly clear.
Rainfall is heavily seasonal
Marco Island averages about 54 inches of rain per year, with distinct wet (roughly July-September) and dry (November-December) seasons. August, the wettest month, averages about 10 inches of rain over 25 rainy days, while December, the driest month, averages only about 1.5 inches over 7 rainy days.
Hurricane season shapes island life directly
Atlantic hurricane season runs June 1 through November 30, overlapping the wettest months. As a barrier island, Marco has real, documented storm history: Hurricane Irma (2017) brought severe wind damage with comparatively limited storm surge, while Hurricane Ian (2022) brought a more contained, flash-flood-style surge event that caused meaningfully less damage than Naples or Fort Myers experienced further north (see the taxes-insurance topic for the full comparison and what it means for insurance costs today).
Key takeaways
- Average annual temperature runs about 75°F; summers are long, hot, and humid (around 91°F in August) while winters are short and mild (around 73°F in January).
- Rainfall totals about 54 inches/year, concentrated in the July-September wet season -- August averages about 10 inches over 25 rainy days versus December's roughly 1.5 inches over 7 days.
- Hurricane season (June 1-November 30) is a real, lived factor here: Hurricane Irma (2017) caused severe wind damage with limited surge, while Hurricane Ian (2022) caused a more contained surge event than the mainland experienced further north.
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