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Jefferson River

Jefferson River Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Jefferson River, 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 Water Temperature in Jefferson River

56°F

TODAY

55°F

YESTERDAY

49°F

A WEEK AGO

As of today, the minimum water temperature in the Jefferson River ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

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 Jefferson River Over the Last 30 Days

Today the water temperature in Jefferson River is higher than the same day in previous years. The water temperature range here in May is from 46°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 Jefferson River 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
May 2249°F56°F
May 2350°F56°F
May 2450°F56°F
May 2550°F56°F
May 2651°F56°F
May 2752°F56°F
May 2855°F56°F
May 2956°F56°F
May 3056°F56°F
May 3156°F56°F
Jun 165°F57°F
Jun 265°F57°F
Jun 365°F58°F
Jun 465°F58°F
Jun 565°F59°F
Jun 665°F59°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 Jefferson River by Month

January

MinimumAverageMaximum
32°F40°F48°F

February

MinimumAverageMaximum
32°F40°F48°F

March

MinimumAverageMaximum
32°F42°F52°F

April

MinimumAverageMaximum
41°F50°F61°F

May

MinimumAverageMaximum
46°F56°F70°F

June

MinimumAverageMaximum
57°F65°F72°F

July

MinimumAverageMaximum
63°F68°F75°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram for Jefferson River

Water Temperature in Cities and Towns on Jefferson River

Whitehall
United States (Montana)
57°F
Three Forks
United States (Montana)
56°F

Jefferson River Weather

MAY 30

54°F / 81°F
overcast

rain: 23% | wind: 12 mph

MAY 31

50°F / 86°F
clear sky

rain: 1% | wind: 8 mph

JUNE 1

57°F / 84°F
moderate drizzle

rain: 15% | wind: 8 mph

JUNE 2

50°F / 63°F
moderate drizzle

rain: 65% | wind: 8 mph

Water Temperature in Jefferson River: General Trends and Swimming Opportunities

Source:
• location Twin Bridges, Montana
Mouth Missouri River
• location Three Forks, Montana
Length 83 mi (134 km)

The Jefferson River, located in southwestern Montana, is a pristine waterway known for its clear waters and tranquil surroundings. Fed by mountain streams and snowmelt, the river’s temperature remains relatively cool for much of the year. In the spring and early summer, when snowmelt is at its peak, the water is typically between 45°F and 55°F (7°C to 13°C). By mid to late summer, the water warms to a more comfortable range of 60°F–70°F (15°C to 21°C), especially in slower-moving sections, making it more inviting for recreational activities.

Swimming in the Jefferson River is possible, particularly during the warmer summer months when the water temperature is more agreeable. However, the river is better known for activities like fly fishing, kayaking, and canoeing, thanks to its calm flow and abundant fish populations. For swimmers, there are a few accessible spots along the river where the water is shallow and calm, ideal for a refreshing dip. The Jefferson River’s scenic beauty and serene atmosphere make it a wonderful place to enjoy the outdoors, whether you’re in the water or simply relaxing along its banks.

Geographical Location of Jefferson River

Frequently Asked Questions About Jefferson River and its Water Temperatures

What is the current water temperature in Jefferson River?

The water temperature today in Jefferson River ranges from 56°F (13.6°C) to 57°F (13.8°C).

What is the water temperature in Jefferson River during the summer months?

The average water temperature in Jefferson River during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Jefferson River in May?

The average water temperature in Jefferson River in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in Jefferson River in September?

The average water temperature in Jefferson River in September is typically between 52°F to 66°F (11°C to 19°C).

Where does Jefferson River flow?

Jefferson River flows through United States (Montana).

Is it possible to swim in the Jefferson River?

Yes, it is possible to swim in the Jefferson River. However, safety is crucial as the river conditions can be unpredictable.