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September weather forecast in Key West

Average data for 10 years

  • 30 August, Sunday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 80%; Wind speed 7 Meters per second, south-easterly; Daytime water temperature +30°

  • 31 August, Monday. morning, 29°; night, 27°; rain; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 80%; Wind speed 6.5 Meters per second, south-easterly; Daytime water temperature +30°

  • 1 September, Tuesday. morning, 29°; night, 28°; rain; Feels like +31°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 6.1 Meters per second, south-easterly; Daytime water temperature +30°

  • 2 September, Wednesday. morning, 29°; night, 27°; ; Feels like +31°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 6.1 Meters per second, easterly; Daytime water temperature +30°

  • 3 September, Thursday. morning, 29°; night, 27°; ; Feels like +31°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 5.8 Meters per second, easterly; Daytime water temperature +30°

  • 4 September, Friday. morning, 29°; night, 27°; rain; Feels like +31°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 6 Meters per second, easterly; Daytime water temperature +30°

  • 5 September, Saturday. morning, 29°; night, 27°; rain; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 6.3 Meters per second, easterly; Daytime water temperature +30°

  • 6 September, Sunday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 80%; Wind speed 6 Meters per second, south-easterly; Daytime water temperature +30°

  • 7 September, Monday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 5.9 Meters per second, easterly; Daytime water temperature +30°

  • 8 September, Tuesday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 6.1 Meters per second, easterly; Daytime water temperature +30°

  • 9 September, Wednesday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 6.8 Meters per second, easterly; Daytime water temperature +30°

  • 10 September, Thursday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 7.1 Meters per second, easterly; Daytime water temperature +30°

  • 11 September, Friday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 79%; Wind speed 6.5 Meters per second, easterly; Daytime water temperature +30°

  • 12 September, Saturday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 6.5 Meters per second, easterly; Daytime water temperature +30°

  • 13 September, Sunday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 6.5 Meters per second, easterly; Daytime water temperature +30°

  • 14 September, Monday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 6.5 Meters per second, easterly; Daytime water temperature +30°

  • 15 September, Tuesday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 6 Meters per second, easterly; Daytime water temperature +30°

  • 16 September, Wednesday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 78%; Wind speed 5.8 Meters per second, easterly; Daytime water temperature +30°

  • 17 September, Thursday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 761 millimeters of mercury; Humidity 78%; Wind speed 5.8 Meters per second, easterly; Daytime water temperature +30°

  • 18 September, Friday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 5.6 Meters per second, easterly; Daytime water temperature +30°

  • 19 September, Saturday. morning, 28°; night, 27°; ; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 6 Meters per second, easterly; Daytime water temperature +30°

  • 20 September, Sunday. morning, 28°; night, 27°; rain; Feels like +30°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 6.9 Meters per second, easterly; Daytime water temperature +30°

  • 21 September, Monday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 7 Meters per second, easterly; Daytime water temperature +30°

  • 22 September, Tuesday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 6.8 Meters per second, easterly; Daytime water temperature +30°

  • 23 September, Wednesday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 6.6 Meters per second, easterly; Daytime water temperature +30°

  • 24 September, Thursday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 7 Meters per second, easterly; Daytime water temperature +30°

  • 25 September, Friday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 7.5 Meters per second, easterly; Daytime water temperature +30°

  • 26 September, Saturday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 81%; Wind speed 7.4 Meters per second, south-easterly; Daytime water temperature +30°

  • 27 September, Sunday. morning, 28°; night, 27°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 81%; Wind speed 7 Meters per second, south-easterly; Daytime water temperature +30°

  • 28 September, Monday. morning, 28°; night, 27°; ; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 6.6 Meters per second, south-easterly; Daytime water temperature +30°

  • 29 September, Tuesday. morning, 28°; night, 26°; rain; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 80%; Wind speed 6.8 Meters per second, easterly; Daytime water temperature +30°

  • 30 September, Wednesday. morning, 28°; night, 26°; ; Feels like +29°; Pressure 760 millimeters of mercury; Humidity 79%; Wind speed 6.8 Meters per second, north-easterly; Daytime water temperature +30°

  • 1 October, Thursday. morning, 28°; night, 26°; rain; Feels like +28°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 7.3 Meters per second, north-easterly; Daytime water temperature +30°

  • 2 October, Friday. morning, 27°; night, 26°; rain; Feels like +28°; Pressure 760 millimeters of mercury; Humidity 78%; Wind speed 7.3 Meters per second, easterly; Daytime water temperature +29°

  • 3 October, Saturday. morning, 28°; night, 26°; rain; Feels like +28°; Pressure 760 millimeters of mercury; Humidity 77%; Wind speed 7.5 Meters per second, easterly; Daytime water temperature +29°

September in Key West is the rainiest and the cloudiest month of the year. In September, the weather in Key West is typically rainy and warm. The average daily high in September is 27 degrees above zero. On average, Key West has 19 rainy, 10 cloudy, and 5 sunny days in September. September along with June, July, and August is considered the least comfortable time to visit Key West.