Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

47.7°F 8.7°C
Frigid Dangerously Cold
47.7°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 7, 2026, 2:45 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

36.6°F
Sunny
Conditions: Sunny
Humidity: 75%
Feels Like: 31.3°F
Wind: SE 2.5 mph
Wind Gusts: 3.6 mph
Pressure: 30.34 in
Precipitation: 0 in
Cloud Cover: 19%
Visibility: 6 mi
UV Index: 1.3

Weather Forecast

Sunny
Sat
H: 47°F
L: 23°F
Overcast
Sun
H: 48°F
L: 23°F
Overcast
Mon
H: 47°F
L: 25°F

Air Quality

EPA Index 1 • Good

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

PM2.5
2.7 μg/m³
Good
PM10
2.8 μg/m³
Good
Ozone (O3)
79 μg/m³
Photochemical
NO2
0.5 μg/m³
Nitrogen Dioxide
SO2
0 μg/m³
Sulfur Dioxide
CO
123 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 54m daylight
Sunrise 7:12 AM
Solar Noon 12:09 PM
Sunset 5:05 PM
Moon
Waning Crescent • 1%
Moonrise 5:39 AM
Transit 10:53 AM
Moonset 3:56 PM

Best Times for Fishing or Hunting

Major Periods

10:23 AM - 12:53 PM
10:45 PM - 1:15 AM

Minor Periods

5:09 AM - 6:39 AM
3:26 PM - 4:56 PM
Action Rating:
Good Action 3/5
Saturday, November 7, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 31.1°F
Average Humidity: 85%
Chance of Rain: 19%
Wind: 3.8 mph
UV Index: 2.6

Astronomical

Sun
9h 54m daylight
Sunrise 7:12 AM
Solar Noon 12:09 PM
Sunset 5:05 PM
Moon
Waning Crescent • 1%
Moonrise 5:39 AM
Transit 10:53 AM
Moonset 3:56 PM

Best Times for Fishing or Hunting

Major Periods

10:23 AM - 12:53 PM
10:45 PM - 1:15 AM

Minor Periods

5:09 AM - 6:39 AM
3:26 PM - 4:56 PM
Action Rating:
Good Action 3/5
Sunday, November 8, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 32°F
Average Humidity: 81%
Chance of Rain: 19%
Wind: 7.6 mph
UV Index: 2.5

Astronomical

Sun
9h 51m daylight
Sunrise 7:13 AM
Solar Noon 12:09 PM
Sunset 5:04 PM
Moon
New • 0%
Moonrise 6:50 AM
Transit 11:39 AM
Moonset 4:21 PM

Best Times for Fishing or Hunting

Major Periods

11:09 AM - 1:39 PM
11:34 PM - 2:04 AM

Minor Periods

6:20 AM - 7:50 AM
3:51 PM - 5:21 PM
Action Rating:
Very Good 4/5
Monday, November 9, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 32.8°F
Average Humidity: 79%
Chance of Rain: 23%
Wind: 7.6 mph
UV Index: 3

Astronomical

Sun
9h 49m daylight
Sunrise 7:15 AM
Solar Noon 12:09 PM
Sunset 5:03 PM
Moon
New • 2%
Moonrise 7:58 AM
Transit 12:27 PM
Moonset 4:50 PM

Best Times for Fishing or Hunting

Major Periods

11:57 AM - 2:27 PM
11:33 PM - 2:03 AM

Minor Periods

7:28 AM - 8:58 AM
4:20 PM - 5:50 PM
Action Rating:
Very Good 4/5
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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