Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

49.1°F

Measurement Time: Monday, October 27, 2025, 11:45 AM MDT

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 / 1,982 meters

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

GPS Coordinates: 44.86639167, -111.3387806

Nearby Water Temperatures

Madison River, Cameron, MT (12.0 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 (32.0 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

28.6°F
Cloudy
Conditions: Cloudy
Humidity: 43%
Feels Like: 19.4°F
Wind: WNW 10.1 mph
Wind Gusts: 21 mph
Pressure: 30.17 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Thundery outbreaks in nearby
Mon
H: 32°F
L: 18°F
Sunny
Tue
H: 37°F
L: 15°F
Partly Cloudy
Wed
H: 44°F
L: 15°F
Sunny
Thu
H: 43°F
L: 20°F
Partly Cloudy
Fri
H: 45°F
L: 18°F

Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 3.45 μg/m3
Carbon Monoxide: 119.85 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 4.95 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 7:57 AM
Sun Transit: 1:09 PM
Sunset: 6:21 PM
Daylight: 10 hrs 23 mins
Moonrise: 2:06 PM
Moon Transit: 6:09 PM
Moonset: 10:18 PM
Moon Phase: Waxing Crescent
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

2:16 AM - 4:46 AM
5:39 PM - 8:09 PM

Minor Periods

9:48 PM - 11:18 PM
1:36 PM - 3:06 PM

Action Rating: 2 out of 5

Winter Weather Advisory issued October 27 at 2:01AM MDT until October 27 at 3:00PM MDT by NWS Pocatello ID

Effective: Mon October 27, 2025, 2:01 AM
Expires: Mon October 27, 2025, 3:00 PM

* WHAT...Snow. Additional snow accumulations of around 2 to 4 inches with up to 6 inches possible for extreme eastern mountain areas. Winds gusting as high as 40 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 3 PM MDT this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute. Gusty winds could bring down tree branches and patchy blowing snow could reduce visibility at times.

Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.
Monday, October 27, 2025

Weather Forecast

Conditions: Thundery outbreaks in nearby
Average Temperature: 25.5°F
Average Humidity: 70%
Chance of Rain: 73%
Wind: 13.6 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 1.9 μg/m3
PM10: 3.01 μg/m3
Carbon Monoxide: 118.37 μg/m3
Nitrogen Dioxide: 1.67 μg/m3
Sulphur Dioxide: 2.45 μg/m3
Ozone: 89.52 μg/m3

Astronomical

Sunrise: 7:57 AM
Sun Transit: 1:09 PM
Sunset: 6:21 PM
Daylight: 10 hrs 23 mins
Moonrise: 2:06 PM
Moon Transit: 6:09 PM
Moonset: 10:18 PM
Moon Phase: Waxing Crescent
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

2:16 AM - 4:46 AM
5:39 PM - 8:09 PM

Minor Periods

9:48 PM - 11:18 PM
1:36 PM - 3:06 PM

Action Rating: 2 out of 5

Tuesday, October 28, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 22.5°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 5.1 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 2.93 μg/m3
PM10: 3.45 μg/m3
Carbon Monoxide: 119.89 μg/m3
Nitrogen Dioxide: 2.29 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 1:09 PM
Sunset: 6:19 PM
Daylight: 10 hrs 20 mins
Moonrise: 2:43 PM
Moon Transit: 7:00 PM
Moonset: 11:25 PM
Moon Phase: First Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
6:30 PM - 9:00 PM

Minor Periods

12:00 AM - 12:00 AM
2:13 PM - 3:43 PM

Action Rating: 3 out of 5

Wednesday, October 29, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 28.8°F
Average Humidity: 48%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 4.59 μg/m3
Carbon Monoxide: 121.41 μg/m3
Nitrogen Dioxide: 2.84 μg/m3
Sulphur Dioxide: 1.86 μg/m3
Ozone: 95.6 μg/m3

Astronomical

Sunrise: 8:00 AM
Sun Transit: 1:09 PM
Sunset: 6:18 PM
Daylight: 10 hrs 18 mins
Moonrise: 3:12 PM
Moon Transit: 7:50 PM
Moonset: 12:25 AM
Moon Phase: First Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

3:59 AM - 6:29 AM
7:20 PM - 9:50 PM

Minor Periods

2:42 PM - 4:12 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, October 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 29.5°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 3.6 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 3.58 μg/m3
PM10: 4.17 μg/m3
Carbon Monoxide: 108.01 μg/m3
Nitrogen Dioxide: 4.27 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 99.2 μg/m3

Astronomical

Sunrise: 8:01 AM
Sun Transit: 1:09 PM
Sunset: 6:16 PM
Daylight: 10 hrs 15 mins
Moonrise: 3:36 PM
Moon Transit: 8:38 PM
Moonset: 12:37 AM
Moon Phase: First Quarter
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

4:47 AM - 7:17 AM
8:08 PM - 10:38 PM

Minor Periods

3:06 PM - 4:36 PM
12:07 AM - 1:37 AM

Action Rating: 2 out of 5

Friday, October 31, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 29.6°F
Average Humidity: 78%
Chance of Rain: 0%
Wind: 5.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 5.54 μg/m3
Carbon Monoxide: 161.39 μg/m3
Nitrogen Dioxide: 8.5 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 81.46 μg/m3

Astronomical

Sunrise: 8:03 AM
Sun Transit: 1:08 PM
Sunset: 6:15 PM
Daylight: 10 hrs 12 mins
Moonrise: 3:58 PM
Moon Transit: 9:25 PM
Moonset: 1:50 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

5:35 AM - 8:05 AM
8:55 PM - 11:25 PM

Minor Periods

3:28 PM - 4:58 PM
1:20 AM - 2:50 AM

Action Rating: 3 out of 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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