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Gallatin River

Gallatin River Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Gallatin 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 Gallatin River

32°F

TODAY

32°F

YESTERDAY

32°F

A WEEK AGO

As of today, the minimum water temperature in the Gallatin River ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.

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 Gallatin River Over the Last 30 Days

Today the water temperature in Gallatin River is lower than the same day in previous years. The water temperature range here in February is from 32°F to 48°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Gallatin 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
Feb 1632°F40°F
Feb 1732°F40°F
Feb 1832°F40°F
Feb 1932°F40°F
Feb 2032°F40°F
Feb 2132°F40°F
Feb 2232°F40°F
Feb 2332°F40°F
Feb 2440°F33°F
Feb 2540°F33°F
Feb 2640°F34°F
Feb 2740°F34°F
Feb 2840°F34°F
Mar 144°F35°F
Mar 244°F35°F
Mar 344°F36°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 Gallatin River by Month

January

MinimumAverageMaximum
32°F40°F48°F

February

MinimumAverageMaximum
32°F40°F48°F

March

MinimumAverageMaximum
37°F44°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 Gallatin River

Gallatin River Weather

FEBRUARY 23

16°F / 50°F
fog

rain: 11% | wind: 17 mph

FEBRUARY 24

25°F / 39°F
fog

rain: 38% | wind: 11 mph

FEBRUARY 25

23°F / 37°F
light drizzle

rain: 45% | wind: 24 mph

FEBRUARY 26

18°F / 34°F
overcast

rain: 31% | wind: 5 mph

FEBRUARY 27

18°F / 34°F
mainly clear

rain: 3% | wind: 5 mph

Water Temperature in Gallatin River: General Trends and Swimming Opportunities

Source Gallatin Range,
• location Wyoming,Gallatin Lake,Three Rivers Peak
Mouth Missouri River
• location Montana
Length 120 mi (190 km)

The Gallatin River, flowing through Montana and Yellowstone National Park, is a cold and fast-moving river that reflects its mountain origins. Fed by snowmelt and mountain springs, the river’s water temperature stays quite cool throughout the year. In spring and early summer, the river is often icy, with temperatures ranging from 40°F to 50°F (4°C to 10°C). By late summer, as the flow slows and air temperatures rise, the water can warm slightly to around 55°F–65°F (13°C–18°C), especially in calmer stretches.

Swimming in the Gallatin River is not very common due to its cold water, swift currents, and rugged terrain. The river is better known for fly fishing, whitewater rafting, and kayaking, which attract outdoor enthusiasts from around the country. For those seeking to cool off, brief wading or dipping in slower-moving sections during summer can be refreshing, but caution is advised due to the strong currents and variable depths. The Gallatin River’s beauty and untamed character make it a destination for adventure rather than leisurely swimming.

Geographical Location of Gallatin River

Frequently Asked Questions About Gallatin River and its Water Temperatures

What is the current water temperature in Gallatin River?

The water temperature today in Gallatin River is 32°F (0.1°C).

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

The average water temperature in Gallatin 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 Gallatin River in May?

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

What is the water temperature in Gallatin River in September?

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

Where does Gallatin River flow?

Gallatin River flows through United States (Wyoming, Montana).

Is it possible to swim in the Gallatin River?

Yes, it is possible to swim in the Gallatin River. However, it's recommended to check local conditions as temperatures and currents can vary.