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September weather forecast in Janesville

Average data for 10 years

  • 30 August, Sunday. morning, 25°; night, 15°; ; Feels like +20°; Pressure 740 millimeters of mercury; Humidity 72%; Wind speed 4 Meters per second, south-easterly;

  • 31 August, Monday. morning, 26°; night, 16°; ; Feels like +20°; Pressure 740 millimeters of mercury; Humidity 72%; Wind speed 3.7 Meters per second, south-easterly;

  • 1 September, Tuesday. morning, 26°; night, 16°; ; Feels like +20°; Pressure 740 millimeters of mercury; Humidity 72%; Wind speed 4 Meters per second, south-easterly;

  • 2 September, Wednesday. morning, 26°; night, 16°; ; Feels like +20°; Pressure 740 millimeters of mercury; Humidity 71%; Wind speed 4 Meters per second, southerly;

  • 3 September, Thursday. morning, 26°; night, 15°; rain; Feels like +20°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.3 Meters per second, south-westerly;

  • 4 September, Friday. morning, 25°; night, 15°; ; Feels like +18°; Pressure 739 millimeters of mercury; Humidity 71%; Wind speed 4.1 Meters per second, westerly;

  • 5 September, Saturday. morning, 25°; night, 16°; ; Feels like +18°; Pressure 740 millimeters of mercury; Humidity 72%; Wind speed 4.5 Meters per second, south-westerly;

  • 6 September, Sunday. morning, 25°; night, 15°; ; Feels like +19°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.5 Meters per second, south-westerly;

  • 7 September, Monday. morning, 25°; night, 15°; ; Feels like +18°; Pressure 739 millimeters of mercury; Humidity 71%; Wind speed 4.5 Meters per second, westerly;

  • 8 September, Tuesday. morning, 23°; night, 14°; rain; Feels like +17°; Pressure 739 millimeters of mercury; Humidity 73%; Wind speed 4.5 Meters per second, northerly;

  • 9 September, Wednesday. morning, 23°; night, 14°; ; Feels like +17°; Pressure 740 millimeters of mercury; Humidity 74%; Wind speed 4 Meters per second, north-easterly;

  • 10 September, Thursday. morning, 24°; night, 14°; ; Feels like +17°; Pressure 740 millimeters of mercury; Humidity 73%; Wind speed 4.5 Meters per second, southerly;

  • 11 September, Friday. morning, 24°; night, 14°; ; Feels like +17°; Pressure 740 millimeters of mercury; Humidity 72%; Wind speed 4.9 Meters per second, southerly;

  • 12 September, Saturday. morning, 24°; night, 14°; ; Feels like +17°; Pressure 739 millimeters of mercury; Humidity 73%; Wind speed 4.5 Meters per second, south-westerly;

  • 13 September, Sunday. morning, 23°; night, 13°; rain; Feels like +16°; Pressure 739 millimeters of mercury; Humidity 73%; Wind speed 4.5 Meters per second, westerly;

  • 14 September, Monday. morning, 23°; night, 13°; ; Feels like +16°; Pressure 739 millimeters of mercury; Humidity 73%; Wind speed 4.1 Meters per second, westerly;

  • 15 September, Tuesday. morning, 22°; night, 13°; ; Feels like +16°; Pressure 741 millimeters of mercury; Humidity 71%; Wind speed 4.1 Meters per second, southerly;

  • 16 September, Wednesday. morning, 23°; night, 13°; ; Feels like +16°; Pressure 741 millimeters of mercury; Humidity 71%; Wind speed 4.4 Meters per second, southerly;

  • 17 September, Thursday. morning, 24°; night, 13°; ; Feels like +16°; Pressure 740 millimeters of mercury; Humidity 71%; Wind speed 4.3 Meters per second, southerly;

  • 18 September, Friday. morning, 24°; night, 14°; rain; Feels like +16°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.3 Meters per second, southerly;

  • 19 September, Saturday. morning, 24°; night, 14°; rain; Feels like +17°; Pressure 738 millimeters of mercury; Humidity 72%; Wind speed 5 Meters per second, southerly;

  • 20 September, Sunday. morning, 24°; night, 14°; rain; Feels like +17°; Pressure 738 millimeters of mercury; Humidity 74%; Wind speed 4.8 Meters per second, southerly;

  • 21 September, Monday. morning, 23°; night, 13°; rain; Feels like +15°; Pressure 738 millimeters of mercury; Humidity 71%; Wind speed 5.1 Meters per second, south-westerly;

  • 22 September, Tuesday. morning, 21°; night, 12°; rain; Feels like +14°; Pressure 739 millimeters of mercury; Humidity 74%; Wind speed 4.9 Meters per second, south-westerly;

  • 23 September, Wednesday. morning, 21°; night, 12°; rain; Feels like +14°; Pressure 740 millimeters of mercury; Humidity 73%; Wind speed 4.4 Meters per second, southerly;

  • 24 September, Thursday. morning, 21°; night, 12°; ; Feels like +14°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.9 Meters per second, southerly;

  • 25 September, Friday. morning, 22°; night, 12°; ; Feels like +14°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.6 Meters per second, south-westerly;

  • 26 September, Saturday. morning, 21°; night, 12°; ; Feels like +14°; Pressure 738 millimeters of mercury; Humidity 70%; Wind speed 4.8 Meters per second, south-westerly;

  • 27 September, Sunday. morning, 21°; night, 11°; ; Feels like +13°; Pressure 737 millimeters of mercury; Humidity 72%; Wind speed 5 Meters per second, south-westerly;

  • 28 September, Monday. morning, 19°; night, 10°; ; Feels like +12°; Pressure 738 millimeters of mercury; Humidity 73%; Wind speed 4.8 Meters per second, northerly;

  • 29 September, Tuesday. morning, 20°; night, 10°; ; Feels like +11°; Pressure 740 millimeters of mercury; Humidity 71%; Wind speed 5 Meters per second, north-westerly;

  • 30 September, Wednesday. morning, 20°; night, 11°; ; Feels like +11°; Pressure 739 millimeters of mercury; Humidity 69%; Wind speed 5.3 Meters per second, south-westerly;

  • 1 October, Thursday. morning, 20°; night, 11°; ; Feels like +12°; Pressure 740 millimeters of mercury; Humidity 69%; Wind speed 5 Meters per second, south-westerly;

  • 2 October, Friday. morning, 20°; night, 11°; rain; Feels like +12°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 4.9 Meters per second, south-westerly;

  • 3 October, Saturday. morning, 19°; night, 11°; rain; Feels like +12°; Pressure 739 millimeters of mercury; Humidity 72%; Wind speed 5 Meters per second, south-westerly;

September in Janesville is the sunniest month of the year. In September, the weather in Janesville is typically warm. The average daily high in September is 18 degrees above zero. On average, Janesville has 13 sunny, 9 rainy, and 5 cloudy days in September.