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Lake St. Louis

Lake St. Louis Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Lake St. Louis, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Lake Water Temperature Information

65°F

TODAY

66°F

YESTERDAY

68°F

A WEEK AGO

As of today, the minimum water temperature in the Lake St. Louis ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Analysis, Historical Data, and Forecast of Water Temperature

Water Temperature Chart for Lake St. Louis Over the Last 30 Days

Today the water temperature in Lake St. Louis is lower than the same day in previous years. The water temperature range here in September is from 66°F to 77°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Lake St. Louis are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Daily Water Temperature Chart

DateCurrentAverageForecast
Sep 568°F72°F
Sep 668°F72°F
Sep 768°F72°F
Sep 868°F72°F
Sep 967°F72°F
Sep 1067°F72°F
Sep 1166°F72°F
Sep 1265°F72°F
Sep 1372°F66°F
Sep 1472°F66°F
Sep 1572°F66°F
Sep 1672°F67°F
Sep 1772°F67°F
Sep 1872°F67°F
Sep 1972°F68°F
Sep 2072°F68°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Lake St. Louis by Month

January

MinimumAverageMaximum
32°F37°F41°F

February

MinimumAverageMaximum
32°F36°F41°F

March

MinimumAverageMaximum
32°F35°F39°F

April

MinimumAverageMaximum
32°F38°F45°F

May

MinimumAverageMaximum
37°F48°F59°F

June

MinimumAverageMaximum
50°F59°F68°F

July

MinimumAverageMaximum
68°F74°F81°F

August

MinimumAverageMaximum
66°F70°F75°F

September

MinimumAverageMaximum
66°F72°F77°F

October

MinimumAverageMaximum
46°F51°F55°F

November

MinimumAverageMaximum
36°F40°F45°F

December

MinimumAverageMaximum
34°F39°F43°F

Monthly Water Temperature Histogram for Lake St. Louis

Lake St. Louis Weather

SEPTEMBER 13

48°F / 68°F
overcast

rain: 8% | wind: 6 mph

SEPTEMBER 14

57°F / 75°F
overcast

rain: 36% | wind: 9 mph

SEPTEMBER 15

52°F / 77°F
overcast

rain: 28% | wind: 10 mph

SEPTEMBER 16

55°F / 81°F
overcast

rain: 3% | wind: 4 mph

SEPTEMBER 17

61°F / 82°F
partly cloudy

rain: 4% | wind: 5 mph

Water Temperature in Lake St. Louis: General Trends and Swimming Opportunities

Lake St.

Lake St. Louis is a medium lake. Its surface area is 26.4 sq mi (68.3 sq km). Typically versatile lakes with developed ecosystems; popular for water sports and tourism.

The water temperature in Lake St. Louis varies throughout the year, ranging from 32°F (0°C) in January to 81°F (27°C) in July. The average annual water temperature of the lake is 48°F (9°C). The months when the average water temperature in Lake St. Louis exceeds 68 degrees Fahrenheit (20°C) are July, August and September.

Geographical Location of Lake St. Louis

Frequently Asked Questions About Lake St. Louis and its Water Temperatures

What is the current water temperature in Lake St. Louis?

The water temperature today in Lake St. Louis is 65°F (18.5°C).

What is the water temperature in Lake St. Louis during the summer months?

The average water temperature in Lake St. Louis during the summer months is typically between 55°F to 76°F (13°C to 24°C), and it can reach up to 81°F (27°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Lake St. Louis in May?

The average water temperature in Lake St. Louis in May ranges from 37°F to 46°F (3°C to 8°C).

What is the water temperature in Lake St. Louis in September?

The average water temperature in Lake St. Louis in September is typically between 68°F to 77°F (20°C to 25°C).

Where is Lake St. Louis located?

Lake St. Louis is located in the United States in the state of New York, in the county of Franklin, at an elevation of 59 feet (18 meters) above sea level. The surface area of the lake is 26.367 sq mi (68.29 sq km).

Is it possible to swim in Lake St. Louis and what are the possibilities for this?

No, it is unfeasible to swim in Lake St. Louis as it is located in Quebec, Canada, not New York or Vermont. Hence, your coordinates may need to be reviewed for accuracy.

What are the coordinates of Lake St. Louis?

Lake St. Louis is located at coordinates 45.3970°N 73.8170°W.

Is Lake Lake St. Louis a popular vacation spot among Americans?

Lake St. Louis enjoys local popularity among the residents of State New York, and nationally, it ranks in the top 10 percent of all lakes in the country.