5-day weather forecast St. Louis Oct 20, 2026
Weather forecast St. Louis Tuesday Oct 20, 2026: sunny, temperature from 13 °C to 23 °C.
Precipitation probability 12%. Wind up to 2.31 m/s (gusts 6.81 m/s). Air humidity 28–52%, atmospheric pressure 769–771 mm Hg, UV index up to 4.6.
5 days at a glance — tap a day to open it
Sunrise 07:15
Sunset 18:16
Sunset 18:16
Waxing Gibbous77% illuminated
Moonrise 15:40 · Moonset 01:40
Moonrise 15:40 · Moonset 01:40
Chart
TableForecast from 13 °C to 23 °C and precipitation
Cloud cover and precipitation probability
Wind speed and direction
Air humidity
Atmospheric pressure
Ultraviolet index
Air quality & pollen
St. Louis on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.