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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

12.7°C

TODAY

13.7°C

YESTERDAY

14.0°C

A WEEK AGO

As of today, the minimum water temperature in the Gallatin 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 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 October is from 8°C to 16°C. 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

Date	Current	Average	Forecast
Sep 30	14.0°C	17.6°C
Oct 1	14.4°C	13.3°C
Oct 2	14.9°C	13.3°C
Oct 3	15.2°C	13.3°C
Oct 4	14.5°C	13.3°C
Oct 5	14.2°C	13.3°C
Oct 6	13.7°C	13.3°C
Oct 7	12.7°C	13.3°C
Oct 8		13.3°C	12.7°C
Oct 9		13.3°C	12.7°C
Oct 10		13.3°C	12.7°C
Oct 11		13.3°C	12.7°C
Oct 12		13.3°C	12.7°C
Oct 13		13.3°C	12.7°C
Oct 14		13.3°C	12.7°C
Oct 15		13.3°C	12.7°C

* 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

Minimum	Average	Maximum
0°C	4.5°C	9°C

February

Minimum	Average	Maximum
0°C	4.5°C	9°C

March

Minimum	Average	Maximum
0°C	5.5°C	11°C

April

Minimum	Average	Maximum
5°C	9.9°C	16°C

May

Minimum	Average	Maximum
8°C	13.4°C	21°C

June

Minimum	Average	Maximum
12°C	17°C	22°C

July

Minimum	Average	Maximum
17°C	20°C	24°C

August

Minimum	Average	Maximum
17°C	21.4°C	23°C

September

Minimum	Average	Maximum
11°C	17.6°C	19°C

October

Minimum	Average	Maximum
8°C	13.3°C	16°C

November

Minimum	Average	Maximum
3°C	8.1°C	16°C

December

Minimum	Average	Maximum
3°C	4.7°C	8°C

Monthly Water Temperature Histogram for Gallatin River

Gallatin River Weather

OCTOBER 8

5°C / 22°C

clear sky

rain: 0% | wind: 10 km/h

OCTOBER 9

6°C / 20°C

mainly clear

rain: 2% | wind: 7 km/h

OCTOBER 10

6°C / 22°C

partly cloudy

rain: 4% | wind: 10 km/h

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

Nearby Rivers

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 55°F (12.7°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.