Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

59.4°F

Measurement Time: Friday, July 17, 2026, 4:45 PM 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

57.5°F
Light rain shower
Light rain shower
48.9°F
57.5°F
94%
WNW 2.5 mph
4 mph
58.5°F
55.7°F
0.05 in
73%
6 mi
1019 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 81°F
L: 51°F
Sunny
Sat
H: 84°F
L: 49°F
Sunny
Sun
H: 85°F
L: 50°F
Sunny
Mon
H: 86°F
L: 48°F
Patchy rain nearby
Tue
H: 84°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 5.3 μg/m3
PM10: 6.2 μg/m3
Carbon Monoxide: 96 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:31 PM
Sunset: 9:07 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:56 AM
Moon Transit: 4:37 PM
Moonset: 11:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
4:07 PM - 6:37 PM

Minor Periods

12:00 AM - 12:00 AM
9:26 AM - 10:56 AM

Action Rating: 2 out of 5

Flood Watch issued July 17 at 10:33AM MDT until July 17 at 10:00PM MDT by NWS Riverton WY

Effective: Fri July 17, 2026, 10:33 AM
Expires: Fri July 17, 2026, 10:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest Wyoming, including the following area, Yellowstone National Park. * WHEN...Until 10 PM MDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Heavy rainfall from slow moving showers and thunderstorms may bring local flooding. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.


Flood Watch issued July 17 at 9:45PM MDT until July 17 at 10:00PM MDT by NWS Riverton WY

Effective: Fri July 17, 2026, 9:45 PM
Expires: Fri July 17, 2026, 10:45 PM

The flooding threat has ended, although showers and storms will continue through the next few hours. Therefore, the Flood Watch will expire at 10 PM MDT this evening.
Friday, July 17, 2026

Weather Forecast

Sunny
81°F
50.6°F
64.7°F
65%
0.13 in
57%
0%
4.9 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.78 μg/m3
PM10: 7.8 μg/m3
Carbon Monoxide: 97.96 μg/m3
Nitrogen Dioxide: 3.48 μg/m3
Sulphur Dioxide: 0.14 μg/m3
Ozone: 79.42 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 1:31 PM
Sunset: 9:07 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:56 AM
Moon Transit: 4:37 PM
Moonset: 11:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
4:07 PM - 6:37 PM

Minor Periods

12:00 AM - 12:00 AM
9:26 AM - 10:56 AM

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
84.1°F
49.3°F
66.6°F
58%
0.04 in
57%
0%
9.4 mph
11.1


Air Quality

AQI: 1 - Good
PM2.5: 3.63 μg/m3
PM10: 4.97 μg/m3
Carbon Monoxide: 95.58 μg/m3
Nitrogen Dioxide: 4.22 μg/m3
Sulphur Dioxide: 0.13 μg/m3
Ozone: 78.17 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 1:31 PM
Sunset: 9:06 PM
Daylight: 15 hrs 10 mins
Moonrise: 11:10 AM
Moon Transit: 5:23 PM
Moonset: 12:05 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

1:34 AM - 4:04 AM
4:53 PM - 7:23 PM

Minor Periods

10:40 AM - 12:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
85°F
50.3°F
67.7°F
40%
0 in
3%
0%
12.3 mph
11.3


Air Quality

AQI: 1 - Good
PM2.5: 2.93 μg/m3
PM10: 4.47 μg/m3
Carbon Monoxide: 92.46 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 0.16 μg/m3
Ozone: 76.96 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:31 PM
Sunset: 9:05 PM
Daylight: 15 hrs 8 mins
Moonrise: 12:21 AM
Moon Transit: 6:06 PM
Moonset: 12:23 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

2:19 AM - 4:49 AM
5:36 PM - 8:06 PM

Minor Periods

11:51 AM - 1:21 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
86°F
47.8°F
66.7°F
33%
0 in
1%
0%
8.1 mph
11.2


Air Quality

AQI: 1 - Good
PM2.5: 3.76 μg/m3
PM10: 4.66 μg/m3
Carbon Monoxide: 92.42 μg/m3
Nitrogen Dioxide: 4.53 μg/m3
Sulphur Dioxide: 0.18 μg/m3
Ozone: 80.63 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:31 PM
Sunset: 9:04 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:29 PM
Moon Transit: 6:50 PM
Moonset: 12:41 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

3:02 AM - 5:32 AM
6:20 PM - 8:50 PM

Minor Periods

12:59 AM - 2:29 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Patchy rain nearby
84.1°F
50.6°F
65.2°F
56%
0.32 in
65%
0%
7.6 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 3.12 μg/m3
PM10: 4.61 μg/m3
Carbon Monoxide: 97.46 μg/m3
Nitrogen Dioxide: 4.28 μg/m3
Sulphur Dioxide: 0.21 μg/m3
Ozone: 79.46 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:31 PM
Sunset: 9:04 PM
Daylight: 15 hrs 4 mins
Moonrise: 2:38 PM
Moon Transit: 7:34 PM
Moonset: 12:01 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

3:46 AM - 6:16 AM
7:04 PM - 9:34 PM

Minor Periods

2:08 PM - 3:38 PM
12:00 AM - 12:00 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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