Monthly averages Lake Saint Louis Longitude: -90.7884, Latitude: 38.7809 Average weather Lake Saint Louis, MO - 63367. Since 1946 the temperature extremes were observed at St. Louis Lambert International Airport. Before then, the weather station was at downtown St. Louis. Get the forecast. For the St. Louis area there is a 40% chance that there will be measurable rainfall on Memorial Day. Up to 2 feet of snow to bury New England this weekend. Annual Weather Averages Near Minneapolis. Free Long Range Weather Forecast for St. Louis, Missouri. Station Data. The most pleasant months of the year for St. Louis are May, September and June. St. Louis Temperature Yesterday. July is the hottest month for St. Louis with an average high temperature of 88.5°, which ranks it as about average compared to other places in Missouri. Calendar overview of Months Weather Forecast. In St. Louis, there are 3 comfortable months with high temperatures in the range of 70-85°. Before then, the weather station was at downtown St. Louis. High & Low Weather Summary for the Past Weeks Average Weather in December in St. Louis Missouri, United States. The lowest temperature measured during that time was -18 degrees Fahrenheit (-28 Celsius) on January 20, 1985 and February 13, 1905. Get the monthly weather forecast for St. Louis, MO, including daily high/low, historical averages, to help you plan ahead. Based on weather reports collected during 1985–2015. Get the monthly weather forecast for St. Louis, MO, including daily high/low, historical averages, to help you plan ahead. These records go back to 1893. Be prepared with the most accurate 10-day forecast for St. Louis, MO with highs, lows, chance of precipitation from The Weather Channel and Weather.com Averages are for St. Paul International Airport, which is 7 miles from Minneapolis. Monthly: 1981-2010 normals Nov December 2020 . Maximum temperature yesterday: 36 °F (at 12:51 am) Minimum temperature yesterday: 27 °F (at 11:51 pm) Average temperature yesterday: 32 °F. These records go back to 1893. Twice it has exceeded 2 inches! The highest temperature measured during that time was 115 degrees Fahrenheit (46 Celsius) on July 14, 1954. Since 1946 the temperature extremes were observed at St. Louis Lambert International Airport. There have been 7 different years the recorded rainfall amount has exceeded 1 inch. ... Includes Daily Risk of Precipitation, High/Low/Average Temperatures, Heating/Cooling Degree Days and Growing Degree Days ... Click or Tap on any day for a detailed forecast. Years the recorded rainfall amount has exceeded 1 inch at downtown St. Lambert. -90.7884, Latitude: 38.7809 average weather Lake Saint Louis Longitude: -90.7884, Latitude: 38.7809 average weather December... Measurable rainfall on Memorial Day Lake Saint Louis, MO - 63367 weather Summary for Past... 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