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Photo: JeffersonLake BJC by Bluelion (Public domain) License

Jefferson Lake

Lake · St. Louis, Missouri

Hot — visit early

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Weather at Jefferson Lake

H: 92° L: 71°
Sunny
Sunny
91°
|
Feels like 94°
Precipitation
4%
Humidity
45%
Wind
10 mph
UV Index
7.8
Water Conditions:
🏊Perfect for swimming🧴High UV - use sunscreen
12 AM
Clear
75°
3 AM
Clear
72°
6 AM
Partly Cloudy
72°
9 AM
Sunny
75°
12 PM
Sunny
84°
3 PM
Sunny
87°
6 PM
Sunny
89°
9 PM
Clear
77°

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Frequently asked questions

Where is Jefferson Lake?
Jefferson Lake is a lake in St. Louis, Missouri.
Can you swim at Jefferson Lake?
There is no fixed answer for Jefferson Lake: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Jefferson Lake in St. Louis, Missouri. Check current water conditions before you go, and follow posted signs and local guidance.
How is Jefferson Lake rated?
Jefferson Lake in St. Louis, Missouri has an average visitor rating of 4.1 out of 5, based on 9 reviews.

Visitor Reviews

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Been here? A quick note helps the next visitor plan their day. Handy things to mention:

Water temperatureCrowds & parkingBest time to goSafety & access

Best Times to Visit

☀️
Right Now
Very warm - visit early morning or evening
🏞️ Lakes Tips:
  • Check for boat launch facilities and fees
  • Obtain required fishing licenses before arrival
  • Be aware of lake-specific regulations and restrictions
  • Monitor water quality reports before swimming
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

St. Louis, MO 63110

St. Louis, Missouri 63110

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