Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

46.6°F 8.1°C
Frigid Dangerously Cold
46.6°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: Saturday, November 14, 2026, 3:45 AM MST

Temperature Locations

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Local Points of Interest

Hebgen Lake; West Yellowstone, MT

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Madison River

Station Name: Madison River bl Hebgen Lake nr Grayling MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 6,503 feet

Nearest Address:
8998 Hebgen Lake Rd
Grayling, MT 59758
Gallatin County

GPS Coordinates: 44.86639167, -111.3387806

Nearby Water Temperatures

Madison River, Cameron, MT (12 mi)
Madison River, West Yellowstone, MT (19.6 mi)
Gibbon River, Yellowstone National Park, WY (28.1 mi)
Firehole River, Yellowstone National Park, WY (28.9 mi)
Yellowstone River, Corwin Springs, MT (31.6 mi)
Tantalus Creek, Yellowstone National Park, WY (32 mi)
Madison River, Ennis, MT (32.4 mi)
Boiling River Hot Springs, Yellowstone National Park, WY (32.8 mi)
Firehole River, Yellowstone National Park, WY (37.9 mi)
Madison River, Norris, MT (45.4 mi)
Lamar River, Yellowstone National Park, WY (46.4 mi)
Snake River, Flagg Ranch, WY (62.5 mi)
Ruby River, Twin Bridges, MT (65.5 mi)
Jefferson River, Twin Bridges, MT (70.6 mi)
Big Hole River, Glen, MT (71.3 mi)

Weather for Grayling, Montana

Current Weather

40.8°F
Overcast
Conditions: Overcast
Humidity: 77%
Feels Like: 36.1°F
Wind: SSE 2.8 mph
Wind Gusts: 5.8 mph
Pressure: 29.72 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 12 mi
UV Index: 0.5

Five-Day Weather Forecast

Overcast
Sat
H: 41°F
L: 34°F
Overcast
Sun
H: 42°F
L: 32°F
Overcast
Mon
H: 46°F
L: 30°F
Moderate Snow
Tue
H: 41°F
L: 27°F
Moderate Snow
Wed
H: 30°F
L: 18°F

Air Quality

EPA Index 2 • Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

PM2.5
8.6 μg/m³
Good
PM10
9.9 μg/m³
Good
Ozone (O3)
97 μg/m³
Photochemical
NO2
0.4 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
120 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 36m daylight
Sunrise 7:21 AM
Solar Noon 12:09 PM
Sunset 4:58 PM
Moon
Waxing Crescent • 21%
Moonrise 12:18 PM
Transit 4:39 PM
Moonset 9:07 PM

Best Times for Fishing or Hunting

Major Periods

3:45 AM - 6:15 AM
4:09 PM - 6:39 PM

Minor Periods

11:48 AM - 1:18 PM
8:37 PM - 10:07 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 37.8°F
Average Humidity: 79%
Chance of Rain: 28%
Wind: 8.5 mph
UV Index: 0.6

Air Quality

EPA Index 2 • Moderate
PM2.5
6.8 μg/m³
Good
PM10
7.9 μg/m³
Good
Ozone (O3)
84.4 μg/m³
Photochemical
NO2
0.9 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
121 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 36m daylight
Sunrise 7:21 AM
Solar Noon 12:09 PM
Sunset 4:58 PM
Moon
Waxing Crescent • 21%
Moonrise 12:18 PM
Transit 4:39 PM
Moonset 9:07 PM

Best Times for Fishing or Hunting

Major Periods

3:45 AM - 6:15 AM
4:09 PM - 6:39 PM

Minor Periods

11:48 AM - 1:18 PM
8:37 PM - 10:07 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 34.9°F
Average Humidity: 74%
Chance of Rain: 1%
Wind: 7.8 mph
UV Index: 2.8

Air Quality

EPA Index 1 • Good
PM2.5
1.3 μg/m³
Good
PM10
2.4 μg/m³
Good
Ozone (O3)
71.6 μg/m³
Photochemical
NO2
0.6 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
113.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 34m daylight
Sunrise 7:23 AM
Solar Noon 12:10 PM
Sunset 4:57 PM
Moon
Waxing Crescent • 31%
Moonrise 12:47 PM
Transit 5:25 PM
Moonset 10:13 PM

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
4:55 PM - 7:25 PM

Minor Periods

12:17 PM - 1:47 PM
9:43 PM - 11:13 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 36°F
Average Humidity: 66%
Chance of Rain: 27%
Wind: 7.1 mph
UV Index: 2.4

Air Quality

EPA Index 1 • Good
PM2.5
3 μg/m³
Good
PM10
4.9 μg/m³
Good
Ozone (O3)
87.3 μg/m³
Photochemical
NO2
1 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
115.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 32m daylight
Sunrise 7:24 AM
Solar Noon 12:10 PM
Sunset 4:56 PM
Moon
First Quarter • 42%
Moonrise 1:10 PM
Transit 6:10 PM
Moonset 11:19 PM

Best Times for Fishing or Hunting

Major Periods

5:18 AM - 7:48 AM
5:40 PM - 8:10 PM

Minor Periods

12:40 PM - 2:10 PM
10:49 PM - 12:19 AM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Moderate Snow
Average Temperature: 34.7°F
Average Humidity: 91%
Chance of Rain: 94%
Wind: 6.4 mph
UV Index: 1.5

Air Quality

EPA Index 1 • Good
PM2.5
3.5 μg/m³
Good
PM10
9.3 μg/m³
Good
Ozone (O3)
84 μg/m³
Photochemical
NO2
1 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
120 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 29m daylight
Sunrise 7:25 AM
Solar Noon 12:10 PM
Sunset 4:55 PM
Moon
First Quarter • 54%
Moonrise 1:30 PM
Transit 6:53 PM
Moonset 1:55 AM

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
6:23 PM - 8:53 PM

Minor Periods

1:25 AM - 2:55 AM
1:00 PM - 2:30 PM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Moderate Snow
Average Temperature: 23.4°F
Average Humidity: 92%
Chance of Rain: 67%
Wind: 5.8 mph
UV Index: 2.6

Air Quality

EPA Index 1 • Good
PM2.5
0.9 μg/m³
Good
PM10
1.2 μg/m³
Good
Ozone (O3)
84.6 μg/m³
Photochemical
NO2
0.8 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
128.1 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 27m daylight
Sunrise 7:27 AM
Solar Noon 12:10 PM
Sunset 4:54 PM
Moon
First Quarter • 65%
Moonrise 1:49 PM
Transit 7:35 PM
Moonset 12:27 AM

Best Times for Fishing or Hunting

Major Periods

6:44 AM - 9:14 AM
7:05 PM - 9:35 PM

Minor Periods

1:19 PM - 2:49 PM
11:57 PM - 1:27 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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