September, the first month of the autumn, in Three Lakes, is also an enjoyable month, with average temperature varying between 42.8°F (6°C) and 66.2°F (19°C). Warmest Month (Monthly Average Temperature) 55.9 in 1963. Temperature In September, the average high-temperature decreases, from a moderately hot 75.2°F (24°C) in August, to a comfortable 66.2°F (19°C).In September, the average low-temperature … Annual Weather Averages Near Sheboygan. Coldest Month (Monthly Average Temperature) 33.5 in 1917. The freeze-free period, or growing season, averages … The coterminous US annual average temperature was 55 degrees Fahrenheit, or 2.2 Fahrenheit degrees above the 20th century long term average temperature and 0.07 Fahrenheit degrees above the previous highest nationwide temperature set in 1998. September 2021; October 2021; November 2021; December 2021; January 2022; February 2022; March 2022; April 2022; May 2022; ... High/Low/Average Temperatures, Heating/Cooling Degree Days and Growing Degree Days United States Winter, Wisconsin Long Range Weather Forecast Helping You Avoid Bad Weather… Winter months average high temperatures of about 25°F (-4°C) and summer months average about 70°F (22°C). The average humidity in September is listed below for places in Wisconsin. Lowest Observed High Temperature (degrees F) 21 on the 28 th in 1925. The amount of rain in September is high with an average of 97mm (3.8in). The tables give daily averages along with highest and lowest relative humidity levels. The average date of the last freezing temperature in spring is June 8, and the average first fall freeze is September 23; however, freezing can occur during any month. This month … The average minimum temperature (usually the minimum temperature is noted during the night) in Lake Geneva in September is 12.0°C (53.6°F). Station Data. Madeline Island, Wisconsin - Travel and vacation weather averages, current conditions and forecasts. Highest Observed Temperature (degrees F) 86 on the 2 nd in 1953. Average Weather during September in Menomonie (Wisconsin), United States of America. Select a destination to see more weather parameters. Monthly averages Appleton Longitude: -88.4154, Latitude: 44.2619 Average weather Appleton, WI - 54911. This month generally has very pleasant temperatures. Average Weather during September in Lake Geneva (Wisconsin), United States of America. Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.. Below are average maximum temperatures at popular destinations in Wisconsin in September. The warmest September on record occurred in 1998 and was 0.5°F warmer than in 2019. For September, the average contiguous U.S. temperature was 68.5°F, 3.7°F above the 20 th century average, tying with 2015 as the second warmest September in the 125-year period of record. Averages are for Sheboygan County Memorial Airport, which is 7 miles from Sheboygan. The average minimum temperature (usually the minimum temperature is noted during the night) in Menomonie in September is 10.0°C (50°F). Wisconsin weather in September 2021. Monthly: 1981 … Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. The amount of rain in September is normal with an average of 69mm (2.7in). Lowest Observed Temperature (degrees F) 6 on the 27 … Most of September was dominated by a trough along the West Coast, bringing more moderate temperatures … Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. 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