Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

47.3°F

Measurement Time: Friday, May 22, 2026, 6:45 AM MDT

Temperature Locations

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Local Points of Interest

Hebgen Lake; West Yellowstone, MT

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

52.3°F
Partly cloudy
Partly cloudy
50.9°F
52.3°F
30%
WSW 5.1 mph
5.9 mph
50.9°F
22.6°F
0 in
75%
9 mi
1018 mbar
6.4

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 55°F
L: 21°F
Patchy rain nearby
Sat
H: 62°F
L: 28°F
Sunny
Sun
H: 68°F
L: 33°F
Sunny
Mon
H: 72°F
L: 38°F
Patchy rain nearby
Tue
H: 64°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 3.95 μg/m3
PM10: 5.55 μg/m3
Carbon Monoxide: 118.85 μg/m3
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 99 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:22 PM
Sunset: 8:55 PM
Daylight: 15 hrs 6 mins
Moonrise: 12:05 AM
Moon Transit: 7:19 PM
Moonset: 1:56 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
6:49 PM - 9:19 PM

Minor Periods

11:35 AM - 1:05 PM
1:26 AM - 2:56 AM

Action Rating: 4 out of 5

Frost Advisory issued May 22 at 4:12AM MDT until May 22 at 9:00AM MDT by NWS Pocatello ID

Effective: Fri May 22, 2026, 4:12 AM
Expires: Fri May 22, 2026, 9:00 AM

* WHAT...Temperatures of 32 to 36 degrees will result in frost formation. More remote locations may drop to around 30 degrees. * WHERE...Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...Until 9 AM MDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Friday, May 22, 2026

Weather Forecast

Patchy rain nearby
54.7°F
20.8°F
38.9°F
57%
0.02 in
81%
0%
6.3 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 3.76 μg/m3
PM10: 4.83 μg/m3
Carbon Monoxide: 119.85 μg/m3
Nitrogen Dioxide: 2.16 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 93.6 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:22 PM
Sunset: 8:55 PM
Daylight: 15 hrs 6 mins
Moonrise: 12:05 AM
Moon Transit: 7:19 PM
Moonset: 1:56 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
6:49 PM - 9:19 PM

Minor Periods

11:35 AM - 1:05 PM
1:26 AM - 2:56 AM

Action Rating: 4 out of 5

Saturday, May 23, 2026

Weather Forecast

Patchy rain nearby
61.8°F
27.6°F
45.3°F
61%
0.02 in
87%
15%
12.5 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 6.57 μg/m3
Carbon Monoxide: 117.49 μg/m3
Nitrogen Dioxide: 1.89 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 100.16 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:22 PM
Sunset: 8:56 PM
Daylight: 15 hrs 8 mins
Moonrise: 1:19 PM
Moon Transit: 8:05 PM
Moonset: 2:20 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
7:35 PM - 10:05 PM

Minor Periods

12:49 AM - 2:19 PM
1:50 AM - 3:20 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Sunny
68°F
33.4°F
51.8°F
51%
0 in
0%
0%
14.5 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 7.07 μg/m3
Carbon Monoxide: 123.41 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 102.56 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:22 PM
Sunset: 8:57 PM
Daylight: 15 hrs 10 mins
Moonrise: 2:29 PM
Moon Transit: 8:49 PM
Moonset: 2:39 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

5:01 AM - 7:31 AM
8:19 PM - 10:49 PM

Minor Periods

1:59 PM - 3:29 PM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Sunny
71.5°F
37.5°F
54.9°F
55%
0 in
0%
0%
13.9 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.83 μg/m3
PM10: 9.53 μg/m3
Carbon Monoxide: 126.17 μg/m3
Nitrogen Dioxide: 2.01 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 97.6 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:22 PM
Sunset: 8:58 PM
Daylight: 15 hrs 12 mins
Moonrise: 3:36 PM
Moon Transit: 9:31 PM
Moonset: 2:57 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

5:44 AM - 8:14 AM
9:01 PM - 11:31 PM

Minor Periods

3:06 PM - 4:36 PM
2:27 AM - 3:57 AM

Action Rating: 4 out of 5

Tuesday, May 26, 2026

Weather Forecast

Patchy rain nearby
64°F
40.7°F
52.5°F
58%
0.07 in
87%
0%
9.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.52 μg/m3
PM10: 10.82 μg/m3
Carbon Monoxide: 131.07 μg/m3
Nitrogen Dioxide: 1.77 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 107.54 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:22 PM
Sunset: 8:59 PM
Daylight: 15 hrs 13 mins
Moonrise: 4:43 PM
Moon Transit: 10:12 PM
Moonset: 3:14 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
12:00 AM - 12:00 AM

Minor Periods

4:13 PM - 5:43 PM
2:44 AM - 4:14 AM

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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