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Boulder Lake Reservoir

Boulder Lake Reservoir Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Boulder Lake Reservoir, 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

62°F

TODAY

62°F

YESTERDAY

61°F

A WEEK AGO

As of today, the minimum water temperature in the Boulder Lake Reservoir ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people.

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 Boulder Lake Reservoir Over the Last 30 Days

Today the water temperature in Boulder Lake Reservoir is lower than the same day in previous years. The water temperature range here in June is from 59°F to 70°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for Boulder Lake Reservoir 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
Jun 1061°F64°F
Jun 1161°F64°F
Jun 1261°F64°F
Jun 1361°F64°F
Jun 1462°F64°F
Jun 1562°F64°F
Jun 1662°F64°F
Jun 1762°F64°F
Jun 1864°F62°F
Jun 1964°F62°F
Jun 2064°F63°F
Jun 2164°F63°F
Jun 2264°F63°F
Jun 2364°F63°F
Jun 2464°F63°F
Jun 2564°F63°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 Boulder Lake Reservoir by Month

January

MinimumAverageMaximum
32°F33°F37°F

February

MinimumAverageMaximum
32°F33°F37°F

March

MinimumAverageMaximum
32°F33°F37°F

April

MinimumAverageMaximum
34°F39°F43°F

May

MinimumAverageMaximum
36°F48°F61°F

June

MinimumAverageMaximum
59°F64°F70°F

July

MinimumAverageMaximum
73°F77°F81°F

August

MinimumAverageMaximum
77°F81°F86°F

September

MinimumAverageMaximum
57°F61°F66°F

October

MinimumAverageMaximum
48°F53°F57°F

November

MinimumAverageMaximum
39°F43°F48°F

December

MinimumAverageMaximum
32°F32°F36°F

Monthly Water Temperature Histogram for Boulder Lake Reservoir

Boulder Lake Reservoir Weather

JUNE 18

54°F / 75°F
overcast

rain: 18% | wind: 7 mph

JUNE 19

54°F / 68°F
light drizzle

rain: 21% | wind: 12 mph

JUNE 20

43°F / 72°F
overcast

rain: 33% | wind: 9 mph

JUNE 21

54°F / 66°F
slight rain showers

rain: 55% | wind: 13 mph

Water Temperature in Boulder Lake Reservoir: General Trends and Swimming Opportunities

Boulder Lake Reservoir is located in the state of Minnesota, in the county of St.

Boulder Lake Reservoir is a medium lake. Its surface area is 5.1 sq mi (13.3 sq km). Typically versatile lakes with developed ecosystems; popular for water sports and tourism.

The water temperature in Boulder Lake Reservoir varies throughout the year, ranging from 32°F (0°C) in January to 86°F (30°C) in August. The average annual water temperature of the lake is 50°F (10°C). The months when the average water temperature in Boulder Lake Reservoir exceeds 68 degrees Fahrenheit (20°C) are July and August.

The nearest cities ans towns to Boulder Lake Reservoir are: Arnold, Hermantown, Duluth, Proctor, Two Harbors, Esko, Cloquet, Carlton in Minnesota and Superior in Wisconsin.

Geographical Location of Boulder Lake Reservoir

Frequently Asked Questions About Boulder Lake Reservoir and its Water Temperatures

What is the current water temperature in Boulder Lake Reservoir?

The water temperature today in Boulder Lake Reservoir is 62°F (16.7°C).

What is the water temperature in Boulder Lake Reservoir during the summer months?

The average water temperature in Boulder Lake Reservoir during the summer months is typically between 66°F to 81°F (19°C to 27°C), and it can reach up to 86°F (30°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Boulder Lake Reservoir in May?

The average water temperature in Boulder Lake Reservoir in May ranges from 52°F to 61°F (11°C to 16°C).

What is the water temperature in Boulder Lake Reservoir in September?

The average water temperature in Boulder Lake Reservoir in September is typically between 57°F to 66°F (14°C to 19°C).

Where is Boulder Lake Reservoir located?

Boulder Lake Reservoir is located in the United States in the state of Minnesota, in the county of St. Louis, at an elevation of 1384 feet (422 meters) above sea level. The surface area of the lake is 5.137 sq mi (13.30 sq km).

Is it possible to swim in Boulder Lake Reservoir and what are the possibilities for this?

Yes, it is possible to swim in Boulder Lake Reservoir, Minnesota. This waterbody offers public boat access which can be used for swimming too.

What are the coordinates of Boulder Lake Reservoir?

Boulder Lake Reservoir is located at coordinates 47.0630°N 92.1760°W.

Is Lake Boulder Lake Reservoir a popular vacation spot among Americans?

Boulder Lake Reservoir enjoys local popularity among the residents of State Minnesota, and nationally, it ranks in the top 10 percent of all lakes in the country.