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Marathon, FL Weather Forecast for 5-Days

Updated: Sun May 17th 2026 11:45 AM EDT

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Marathon, FL Weather – 5-17 – Sunny
85° / 81°
Sunny
A sunny day is in the forecast for Marathon, with a high of 85°F and a low of 81°F. Winds will be strong at speeds peaking at 23mph and gusts of 29.3mph at 10 PM. The humidity will be on the higher side, averaging about 78%, the maximum being 83% at 11 PM and 72% being its lowest at 3 PM. Barometric pressure is its highest of 30.09inHg at 12 PM, a lowest point of 30.01inHg at 6 PM with an avg 30.05inHg.
Marathon, FL Weather – 5-18 – Scattered Showers
83° / 80°

Weather Tomorrow

Scattered Showers
Passing showers are in the forecast for Marathon, with a high of 83°F and a low of 80°F. The chance of rain is 89% with an estimated 0.06in. Winds will be strong at speeds peaking at 23mph and gusts of 29mph at 12 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 82% at 12 AM and 69% being its lowest at 8 AM. Barometric pressure is its highest of 30.1inHg at 12 PM, a lowest point of 30.01inHg at 4 AM with an avg 30.06inHg.
Marathon, FL Weather – 5-19 – Moderate Rain
82° / 81°
Moderate Rain
It will rain at times in Marathon, with a high of 82°F and a low of 81°F. The chance of rain is 88% with an estimated 0.22in. Winds will be strong at speeds peaking at 22mph and gusts of 27.9mph at 12 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 76% at 3 AM and 72% being its lowest at 8 PM. Barometric pressure is its highest of 30.1inHg at 11 AM, a lowest point of 30.02inHg at 5 AM with an avg 30.06inHg.
Marathon, FL Weather – 5-20 – Scattered Showers
82° / 81°
Scattered Showers
In Marathon, showers likely at times with highs near 82°F and lows around 81°F. The chance of rain is 89% with an estimated 0.15in. Winds will be strong at speeds peaking at 21mph and gusts of 26.3mph at 11 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 75% at 4 AM and 69% being its lowest at 7 PM. Barometric pressure is its highest of 30.07inHg at 11 AM, a lowest point of 29.99inHg at 5 AM with an avg 30.02inHg.
Marathon, FL Weather – 5-21 – Scattered Showers
83° / 82°
Scattered Showers
Marathon could see passing showers with daytime highs of 83°F and nighttime lows near 82°F. The chance of rain is 89% with an estimated 0.05in. Winds will be strong at speeds peaking at 21mph and gusts of 26.7mph at 12 AM. The humidity will be on the higher side, averaging about 69%, the maximum being 73% at 12 AM and 64% being its lowest at 7 PM. Barometric pressure is its highest of 30.03inHg at 11 AM, a lowest point of 29.95inHg at 4 AM with an avg 29.99inHg.
Marathon, FL Weather – 5-22 – Scattered Showers
83° / 81°
Scattered Showers
Daytime highs will reach 83°F with lows dropping to 81°F in Marathon, where on and off showers are set to occur. The chance of rain is 79% with an estimated 0.01in. Winds will be strong at speeds peaking at 21mph and gusts of 26.4mph at 11 PM. The humidity will be on the higher side, averaging about 71%, the maximum being 73% at 12 AM and 69% being its lowest at 11 AM. Barometric pressure is its highest of 30.04inHg at 11 AM, a lowest point of 29.98inHg at 4 AM with an avg 30.01inHg.

Currently

Sunny 84°F
30.08 inHg.
Barometer
72%
Humidity
E 27.7 mph
Wind
Sunny

5 Day Forecast Nearby

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