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Marathon, FL Weather Tomorrow

Tomorrow's forecast for Marathon includes an extended 5 day weather outlook with daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Marathon area and around Monroe county, Florida.
Updated: Sun Oct 11th 2026 7:00 PM EDT
Marathon, FL Weather – 10-11 – Sunny
85° / 85°
Sunny
Marathon may see a sunny day, with daytime highs of 85°F and overnight lows near 85°F. Rainfall predicted to have a 57% chance with an estimated 0.05in. Wind will be moderate, blowing around 20mph on average and gusts of 14.3mph at 11 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 76% at 8 PM and 74% being its lowest at 10 PM. Barometric pressure is its highest of 30.05inHg at 10 PM, a lowest point of 30.03inHg at 8 PM with an avg 30.04inHg.
Marathon, FL Weather – 10-12 – Sunny
85° / 83°

Weather Tomorrow

Sunny
In Marathon, it will be sunny with highs near 85°F and lows around 83°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 16mph on average and gusts of 15.7mph at 11 PM. The humidity will be on the higher side, averaging about 74%, the maximum being 77% at 11 PM and 70% being its lowest at 6 PM. Barometric pressure is its highest of 30.03inHg at 12 AM, a lowest point of 29.94inHg at 5 PM with an avg 29.99inHg.
Marathon, FL Weather – 10-13 – Scattered Showers
83° / 82°
Scattered Showers
Daytime highs will reach 83°F with lows dropping to 82°F in Marathon, where on and off showers are set to occur. Rainfall predicted to have a 57% chance with an estimated 0.05in. Wind will be moderate, blowing around 20mph on average and gusts of 28.9mph at 7 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 79% at 12 AM and 64% being its lowest at 2 PM. Barometric pressure is its highest of 30.01inHg at 11 AM, a lowest point of 29.92inHg at 4 AM with an avg 29.96inHg.
Marathon, FL Weather – 10-14 – Scattered Showers
83° / 82°
Scattered Showers
Showers likely at times in Marathon, with a high of 83°F and a low of 82°F. Rainfall predicted to have a 57% chance with an estimated 0.06in. Wind will be moderate, blowing around 19mph on average and gusts of 27.1mph at 12 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 76% at 10 PM and 69% being its lowest at 6 AM. Barometric pressure is its highest of 30inHg at 12 PM, a lowest point of 29.93inHg at 5 PM with an avg 29.97inHg.
Marathon, FL Weather – 10-15 – Scattered Showers
83° / 83°
Scattered Showers
Daytime highs will reach 83°F with lows dropping to 83°F in Marathon, where showers likely at times. Rainfall predicted to have a 63% chance with an estimated 0.07in. Wind will be moderate, blowing around 18mph on average and gusts of 18.4mph at 9 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 77% at 6 PM and 74% being its lowest at 12 AM. Barometric pressure is its highest of 30.02inHg at 11 AM, a lowest point of 29.94inHg at 5 PM with an avg 29.97inHg.
Marathon, FL Weather – 10-16 – Overcast
84° / 83°
Overcast
Marathon is set for cloud-filled skies with temperatures peaking at 84°F and dipping to 83°F. The chance of rain is 80% with an estimated 0.27in. Wind will be moderate, blowing around 17mph on average and gusts of 17.5mph at 12 AM. The humidity will be on the higher side, averaging about 75%, the maximum being 78% at 6 AM and 73% being its lowest at 2 PM. Barometric pressure is its highest of 29.99inHg at 11 AM, a lowest point of 29.91inHg at 5 PM with an avg 29.95inHg.

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