Lake Saint Louis water level & water temperature
Lake Saint Louis water level is measured by NASA's SWOT satellite via PO.DAAC Hydrocron — a new elevation roughly every 1–2 weeks as the satellite passes over. Typical level elevation is 500 ft. The latest pass reading, recent trend, and multi-year history appear below as the data loads.
Lake Saint Louis water temperature by month
Lake Saint Louis surface water temperature averages from about 39°F in January to 86°F in July over the year, based on a 40-year USGS model (1980–2020). Cold-water caution applies in roughly half the year, when the typical temperature is below 60°F.
Typical surface temperatures (°F), modeled historical averages (USGS 185k-lake dataset, 1980–2020). Colors flag cold-water risk: blue/amber/red = cool, caution, danger. Live and recent readings appear above where a sensor is available.