Posted in Web Lake Saint Louis, MO Weather – The Weather Channel May 10, 2024 Be prepared with the most accurate 10-day forecast for Lake Saint Louis, MO with highs, lows, chance of precipitation from The Weather Channel and Weather.com. https://weather.com/weather/tenday/l/Lake+Saint+Louis+MO?canonicalCityId=e401e98c6202a7876a5e5c837372f271a6d418e4506d507d7c4dc763e3220323