Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

56.5°F

Measurement Time: Tuesday, October 7, 2025, 9:45 PM 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

23.7°F
Clear
Conditions: Clear
Humidity: 100%
Feels Like: 20.1°F
Wind: SE 2.9 mph
Wind Gusts: 6.1 mph
Pressure: 30.18 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Wed
H: 58°F
L: 35°F
Sunny
Thu
H: 65°F
L: 42°F
Partly Cloudy
Fri
H: 59°F
L: 48°F
Heavy rain
Sat
H: 63°F
L: 42°F
Moderate or heavy snow showers
Sun
H: 40°F
L: 27°F

Air Quality

PM2.5: 4.15 μg/m3
PM10: 5.35 μg/m3
Carbon Monoxide: 131.85 μg/m3
Nitrogen Dioxide: 2.75 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 100 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 1:12 PM
Sunset: 6:52 PM
Daylight: 11 hrs 20 mins
Moonrise: 7:26 PM
Moon Transit: 2:09 AM
Moonset: 9:38 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

1:39 AM - 4:09 AM
11:10 AM - 1:40 PM

Minor Periods

6:56 PM - 8:26 PM
9:08 AM - 10:38 AM

Action Rating: 4 out of 5

Freeze Warning issued October 7 at 11:33AM MDT until October 8 at 9:00AM MDT by NWS Pocatello ID

Effective: Tue October 7, 2025, 11:33 AM
Expires: Wed October 8, 2025, 9:00 AM

* WHAT...Sub-freezing temperatures as low as 27 expected, mainly across rural parts of these zones. Urban areas around Idaho Falls and Pocatello will likely remain at or above the freezing mark. * WHERE...Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...From 1 AM to 9 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Wednesday, October 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 47.5°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 3.67 μg/m3
PM10: 4.51 μg/m3
Carbon Monoxide: 126.45 μg/m3
Nitrogen Dioxide: 2.94 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 99 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 1:12 PM
Sunset: 6:52 PM
Daylight: 11 hrs 20 mins
Moonrise: 7:26 PM
Moon Transit: 2:09 AM
Moonset: 9:38 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

1:39 AM - 4:09 AM
11:10 AM - 1:40 PM

Minor Periods

6:56 PM - 8:26 PM
9:08 AM - 10:38 AM

Action Rating: 4 out of 5

Thursday, October 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 52.9°F
Average Humidity: 43%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 3.88 μg/m3
PM10: 5.57 μg/m3
Carbon Monoxide: 121.73 μg/m3
Nitrogen Dioxide: 3.58 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 93.96 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 1:12 PM
Sunset: 6:51 PM
Daylight: 11 hrs 17 mins
Moonrise: 8:01 PM
Moon Transit: 3:06 AM
Moonset: 11:04 AM
Moon Phase: Waning Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

2:36 AM - 5:06 AM
12:09 AM - 2:39 PM

Minor Periods

7:31 PM - 9:01 PM
10:34 AM - 12:04 AM

Action Rating: 2 out of 5

Friday, October 10, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 52.1°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 12.8 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 3.21 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 109.25 μg/m3
Nitrogen Dioxide: 4.77 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 83.68 μg/m3

Astronomical

Sunrise: 7:35 AM
Sun Transit: 1:12 PM
Sunset: 6:49 PM
Daylight: 11 hrs 14 mins
Moonrise: 8:46 PM
Moon Transit: 4:07 AM
Moonset: 12:28 AM
Moon Phase: Waning Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

3:37 AM - 6:07 AM
1:11 PM - 3:41 PM

Minor Periods

8:16 PM - 9:46 PM
11:58 AM - 1:28 PM

Action Rating: 2 out of 5

Saturday, October 11, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 50.3°F
Average Humidity: 76%
Chance of Rain: 85%
Wind: 11.4 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 4.73 μg/m3
PM10: 6.8 μg/m3
Carbon Monoxide: 115.93 μg/m3
Nitrogen Dioxide: 2.8 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 79.92 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 1:11 PM
Sunset: 6:47 PM
Daylight: 11 hrs 11 mins
Moonrise: 9:43 PM
Moon Transit: 5:11 AM
Moonset: 1:43 PM
Moon Phase: Waning Gibbous
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

4:41 AM - 7:11 AM
2:15 PM - 4:45 PM

Minor Periods

9:13 PM - 10:43 PM
1:13 PM - 2:43 PM

Action Rating: 3 out of 5

Sunday, October 12, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 33.5°F
Average Humidity: 88%
Chance of Rain: 62%
Wind: 11.6 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:37 AM
Sun Transit: 1:11 PM
Sunset: 6:45 PM
Daylight: 11 hrs 8 mins
Moonrise: 10:52 PM
Moon Transit: 6:15 AM
Moonset: 2:43 PM
Moon Phase: Waning Gibbous
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

5:45 AM - 8:15 AM
3:18 PM - 5:48 PM

Minor Periods

10:22 PM - 11:52 PM
2:13 PM - 3:43 PM

Action Rating: 2 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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