Lake St. Louis, MO Weather Forecast
St. Charles County, Missouri
Live radar, warnings and storm tracking for Lake St. Louis, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Lake St. Louis
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Lake St. Louis, MO at a glance
Lake St. Louis is home to about 18,661 people in St. Charles County, across 8.5 square miles. It ranks 38th by population of 211 places in Missouri with a forecast here. The nearest neighbour with its own forecast is O'Fallon, 4 miles away.
- County
- St. Charles County
- Population
- 18,661 2023 est.
- Land area
- 8.5 sq mi
- People per sq mi
- 2,185
- Forecast point
- 38.7799°N, 90.7856°W
How well can the network see Lake St. Louis?
The nearest Doppler radar is KLSX (St. Louis, MO), to the SE. Its lowest scan passes about 390 ft above Lake St. Louis. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Lake St. Louis show up clearly. Lake St. Louis is closer to its radar than 97% of US cities.
The closest weather station is KSUS (St Louis/Spirit of St Louis Arpt). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Lake St. Louis
- O'Fallon, MO4 mi
- Dardenne Prairie, MO5 mi
- Wentzville, MO5 mi
- St. Paul, MO5 mi
- Cottleville, MO7 mi
- Weldon Spring, MO9 mi
- St. Peters, MO10 mi
- Moscow Mills, MO14 mi
Elsewhere in Missouri
Kansas CitySt. LouisSpringfieldColumbiaIndependenceLee's SummitAll Missouri forecasts →