Water Temperature of the Jefferson River in Three Forks, MT

Current Water Temperature

42.3°F 5.7°C
Frigid Dangerously Cold
42.3°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Friday, November 13, 2026, 10:00 PM MST

Temperature Locations

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Jefferson River

Station Name: Jefferson River near Three Forks MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 4,081 feet

Nearest Address:
87571 Frontage Rd
Three Forks, MT 59752
Gallatin County

GPS Coordinates: 45.8971361, -111.5956722

Nearby Water Temperatures

Missouri River, Toston, MT (19.2 mi)
Madison River, Norris, MT (28.2 mi)
Jefferson River, Waterloo, MT (30.3 mi)
Jefferson River, Twin Bridges, MT (40.4 mi)
Ruby River, Twin Bridges, MT (44.6 mi)
Madison River, Ennis, MT (46.5 mi)
Big Hole River, Glen, MT (56.1 mi)
Camas Creek, White Sulphur Springs, MT (57.3 mi)
Warm Springs Creek, Warm Springs, MT (60.3 mi)
Yellowstone River, Corwin Springs, MT (66.7 mi)
Madison River, Cameron, MT (69.7 mi)
Madison River, Grayling, MT (72.3 mi)
Boiling River Hot Springs, Yellowstone National Park, WY (76.8 mi)
Missouri River, Wolf Creek, MT (78.4 mi)
Lamar River, Yellowstone National Park, WY (88.8 mi)

Weather for Three Forks, Montana

Current Weather

36.3°F
Partly Cloudy
Conditions: Partly Cloudy
Humidity: 64%
Feels Like: 30.9°F
Wind: NNW 1.7 mph
Wind Gusts: 2 mph
Pressure: 29.54 in
Precipitation: 0 in
Cloud Cover: 76%
Visibility: 15.3 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Sat
H: 61°F
L: 36°F
Overcast
Sun
H: 57°F
L: 35°F
Overcast
Mon
H: 51°F
L: 37°F
Slight Rain
Tue
H: 43°F
L: 35°F
Light Drizzle
Wed
H: 39°F
L: 29°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
12.7 μg/m³
Moderate
PM10
14.3 μg/m³
Good
Ozone (O3)
43 μg/m³
Photochemical
NO2
4.4 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
155 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 31m daylight
Sunrise 7:25 AM
Solar Noon 12:10 PM
Sunset 4:56 PM
Moon
Waxing Crescent • 21%
Moonrise 12:24 PM
Transit 4:40 PM
Moonset 9:04 PM

Best Times for Fishing or Hunting

Major Periods

3:46 AM - 6:16 AM
4:10 PM - 6:40 PM

Minor Periods

11:54 AM - 1:24 PM
8:34 PM - 10:04 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.7°F
Average Humidity: 60%
Chance of Rain: 25%
Wind: 16.3 mph
UV Index: 2.8

Air Quality

EPA Index 2 • Moderate
PM2.5
8.4 μg/m³
Good
PM10
9.6 μg/m³
Good
Ozone (O3)
58.8 μg/m³
Photochemical
NO2
3.7 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
142.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 31m daylight
Sunrise 7:25 AM
Solar Noon 12:10 PM
Sunset 4:56 PM
Moon
Waxing Crescent • 21%
Moonrise 12:24 PM
Transit 4:40 PM
Moonset 9:04 PM

Best Times for Fishing or Hunting

Major Periods

3:46 AM - 6:16 AM
4:10 PM - 6:40 PM

Minor Periods

11:54 AM - 1:24 PM
8:34 PM - 10:04 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 43.9°F
Average Humidity: 52%
Chance of Rain: 1%
Wind: 15.1 mph
UV Index: 2.5

Air Quality

EPA Index 1 • Good
PM2.5
2 μg/m³
Good
PM10
2.6 μg/m³
Good
Ozone (O3)
50.6 μg/m³
Photochemical
NO2
3.1 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
128.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 28m daylight
Sunrise 7:27 AM
Solar Noon 12:11 PM
Sunset 4:55 PM
Moon
Waxing Crescent • 31%
Moonrise 12:51 PM
Transit 5:26 PM
Moonset 10:11 PM

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
4:56 PM - 7:26 PM

Minor Periods

12:21 PM - 1:51 PM
9:41 PM - 11:11 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 43.5°F
Average Humidity: 53%
Chance of Rain: 22%
Wind: 3.5 mph
UV Index: 2.4

Air Quality

EPA Index 1 • Good
PM2.5
3.3 μg/m³
Good
PM10
5 μg/m³
Good
Ozone (O3)
45.7 μg/m³
Photochemical
NO2
4.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
137.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 26m daylight
Sunrise 7:28 AM
Solar Noon 12:11 PM
Sunset 4:54 PM
Moon
First Quarter • 42%
Moonrise 1:13 PM
Transit 6:11 PM
Moonset 11:18 PM

Best Times for Fishing or Hunting

Major Periods

5:19 AM - 7:49 AM
5:41 PM - 8:11 PM

Minor Periods

12:43 PM - 2:13 PM
10:48 PM - 12:18 AM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Slight Rain
Average Temperature: 39°F
Average Humidity: 77%
Chance of Rain: 73%
Wind: 7.6 mph
UV Index: 1.4

Air Quality

EPA Index 1 • Good
PM2.5
3.3 μg/m³
Good
PM10
3.8 μg/m³
Good
Ozone (O3)
61.9 μg/m³
Photochemical
NO2
4.6 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
131.6 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 24m daylight
Sunrise 7:29 AM
Solar Noon 12:11 PM
Sunset 4:53 PM
Moon
First Quarter • 54%
Moonrise 1:33 PM
Transit 6:54 PM
Moonset 1:58 AM

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
6:24 PM - 8:54 PM

Minor Periods

1:28 AM - 2:58 AM
1:03 PM - 2:33 PM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 33.6°F
Average Humidity: 82%
Chance of Rain: 49%
Wind: 4.2 mph
UV Index: 2.8

Air Quality

EPA Index 1 • Good
PM2.5
2.6 μg/m³
Good
PM10
3.2 μg/m³
Good
Ozone (O3)
80.2 μg/m³
Photochemical
NO2
2.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
161 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 21m daylight
Sunrise 7:31 AM
Solar Noon 12:11 PM
Sunset 4:52 PM
Moon
First Quarter • 65%
Moonrise 1:51 PM
Transit 7:36 PM
Moonset 12:26 AM

Best Times for Fishing or Hunting

Major Periods

6:45 AM - 9:15 AM
7:06 PM - 9:36 PM

Minor Periods

1:21 PM - 2:51 PM
11:56 PM - 1:26 AM
Action Rating:
Fair Action 2/5
The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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