Key Colony Beach, FL Weather Forecast | 5 Day

Updated: Fri Sep 18th 2026 6:30 PM EDT

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Key Colony Beach, FL Weather Forecast - 9-18-26 - Sunny

Sunny

Fri 9-18-26

Sunny with a high of 86°F and a low of 83°F. Rainfall expected to have a 57% chance with an estimated 0.08in. Wind will be moderate, blowing around 15mph on average and gusts of 13.2mph at 11 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 74% at 10 PM and 69% being its lowest at 7 PM. Barometric pressure is its highest of 29.97inHg at 9 PM, a lowest point of 29.93inHg at 8 PM with an avg 29.96inHg.

    • HI: 86°F
    • LO: 83°F
    • Rainfall: 57% | est. 0.08in
    • Snowfall: 0%
    • Wind
      14.1 mph
    • Humidity
      72% avg.
    • UV Index
      9.3
    • Air Quality
      Good
    • Sunrise
      07:11 AM
    • Sunset
      07:25 PM
    • Moonrise
      02:27 PM
    • Moonset
      12:02 AM
    • Moon Phase
      First Quarter
Key Colony Beach, FL Weather Forecast - 9-19-26 - Overcast

Overcast

Weather Tomorrow, Sat 9-19-26

Overcast with a high of 85°F and a low of 79°F. Rainfall expected to have a 73% chance with an estimated 0.15in. Wind will be moderate, blowing around 17mph on average and gusts of 28mph at 10 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 82% at 10 PM and 65% being its lowest at 7 PM. Barometric pressure is its highest of 29.96inHg at 12 PM, a lowest point of 29.87inHg at 6 PM with an avg 29.92inHg.

    • HI: 85°F
    • LO: 79°F
    • Rainfall: 73% | est. 0.15in
    • Snowfall: 0%
    • Wind
      16.8 mph
    • Humidity
      72% avg.
    • UV Index
      7.6
    • Air Quality
      Good
    • Sunrise
      07:11 AM
    • Sunset
      07:24 PM
    • Moonrise
      03:16 PM
    • Moonset
      12:56 AM
    • Moon Phase
      First Quarter
Key Colony Beach, FL Weather Forecast - 9-20-26 - Overcast

Overcast

Sun 9-20-26

Overcast with a high of 85°F and a low of 80°F. It will likey rain, having a 79% chance of a downpour with an estimated 0.41in. Wind will be moderate, blowing around 12mph on average and gusts of 18.8mph at 4 AM. The humidity will be on the higher side, averaging about 69%, the maximum being 82% at 12 AM and 64% being its lowest at 10 PM. Barometric pressure is its highest of 29.94inHg at 11 AM, a lowest point of 29.84inHg at 6 PM with an avg 29.89inHg.

    • HI: 85°F
    • LO: 80°F
    • Rainfall: 79% | est. 0.41in
    • Snowfall: 0%
    • Wind
      11.6 mph
    • Humidity
      69% avg.
    • UV Index
      10.2
    • Air Quality
      Good
    • Sunrise
      07:12 AM
    • Sunset
      07:22 PM
    • Moonrise
      04:00 PM
    • Moonset
      01:51 AM
    • Moon Phase
      Waxing Gibbous
Key Colony Beach, FL Weather Forecast - 9-21-26 - Overcast

Overcast

Mon 9-21-26

Overcast with a high of 84°F and a low of 83°F. Rainfall expected to have a 68% chance with an estimated 0.13in. Wind will be moderate, blowing around 16mph on average and gusts of 26.8mph at 3 AM. The humidity will be on the higher side, averaging about 68%, the maximum being 74% at 3 AM and 63% being its lowest at 6 PM. Barometric pressure is its highest of 29.94inHg at 12 PM, a lowest point of 29.85inHg at 6 PM with an avg 29.89inHg.

    • HI: 84°F
    • LO: 83°F
    • Rainfall: 68% | est. 0.13in
    • Snowfall: 0%
    • Wind
      15.7 mph
    • Humidity
      68% avg.
    • UV Index
      10.2
    • Air Quality
      Good
    • Sunrise
      07:12 AM
    • Sunset
      07:21 PM
    • Moonrise
      04:38 PM
    • Moonset
      02:46 AM
    • Moon Phase
      Waxing Gibbous
Key Colony Beach, FL Weather Forecast - 9-22-26 - Overcast

Overcast

Tue 9-22-26

Overcast with a high of 84°F and a low of 83°F. Rainfall expected to have a 66% chance with an estimated 0.13in. Wind will be moderate, blowing around 13mph on average and gusts of 23.7mph at 1 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 75% at 1 AM and 69% being its lowest at 4 AM. Barometric pressure is its highest of 29.97inHg at 11 PM, a lowest point of 29.88inHg at 6 AM with an avg 29.92inHg.

    • HI: 84°F
    • LO: 83°F
    • Rainfall: 66% | est. 0.13in
    • Snowfall: 0%
    • Wind
      12.5 mph
    • Humidity
      71% avg.
    • UV Index
      7
    • Air Quality
      Good
    • Sunrise
      07:12 AM
    • Sunset
      07:20 PM
    • Moonrise
      05:13 PM
    • Moonset
      03:40 AM
    • Moon Phase
      Waxing Gibbous
Key Colony Beach, FL Weather Forecast - 9-23-26 - Overcast

Overcast

Wed 9-23-26

Overcast with a high of 85°F and a low of 79°F. It will likey rain, having a 82% chance of a downpour with an estimated 0.39in. Winds will be light at 10mph and gusts of 18.6mph at 3 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 75% at 2 PM and 68% being its lowest at 2 AM. Barometric pressure is its highest of 29.99inHg at 8 PM, a lowest point of 29.91inHg at 5 AM with an avg 29.96inHg.

    • HI: 85°F
    • LO: 79°F
    • Rainfall: 82% | est. 0.39in
    • Snowfall: 0%
    • Wind
      9.2 mph
    • Humidity
      71% avg.
    • UV Index
      6
    • Air Quality
      TBA
    • Sunrise
      07:13 AM
    • Sunset
      07:19 PM
    • Moonrise
      05:44 PM
    • Moonset
      04:33 AM
    • Moon Phase
      Waxing Gibbous

This 5-Day weather forecast is valid for ZIP code 33051, accurately covering the area of Key Colony Beach, FL.