Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

34.7°F

Measurement Time: Tuesday, January 6, 2026, 9:45 AM MST

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

25.5°F
Overcast
Overcast
12°F
25.5°F
95%
SSW 10.3 mph
11.8 mph
12°F
27.3°F
0 in
100%
4 mi
1011 mbar
0

Five Day Weather Forecast

Moderate or heavy snow showers
Tue
H: 29°F
L: 19°F
Moderate or heavy snow showers
Wed
H: 29°F
L: 17°F
Moderate or heavy snow showers
Thu
H: 20°F
L: 3°F
Partly Cloudy
Fri
H: 22°F
L: -7°F
Freezing fog
Sat
H: 24°F
L: -8°F

Air Quality

AQI: 1 - Good
PM2.5: 1.35 μg/m3
PM10: 1.35 μg/m3
Carbon Monoxide: 130.85 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 81 μg/m3

Astronomical

Sunrise: 8:03 AM
Sun Transit: 12:31 AM
Sunset: 5:00 PM
Daylight: 8 hrs 57 mins
Moonrise: 9:13 PM
Moon Transit: 3:16 AM
Moonset: 10:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
12:14 AM - 2:44 PM

Minor Periods

8:43 PM - 10:13 PM
9:50 AM - 11:20 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued January 6 at 2:43AM MST until January 6 at 11:00AM MST by NWS Great Falls MT

Effective: Tue January 6, 2026, 2:43 AM
Expires: Tue January 6, 2026, 11:00 AM

* WHAT...Snow. Additional snow accumulations up to one inch. Winds gusting as high as 55 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...Until 11 AM MST this morning. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website.


Winter Weather Advisory issued January 6 at 1:22AM MST until January 6 at 5:00PM MST by NWS Pocatello ID

Effective: Tue January 6, 2026, 1:22 AM
Expires: Tue January 6, 2026, 4:00 PM

* WHAT...Snow. Additional snow accumulations up to 5 inches. * WHERE...Centennial Mountains - Island Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning and evening commutes.

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


Winter Weather Advisory issued January 6 at 4:55AM MST until January 7 at 5:00PM MST by NWS Riverton WY

Effective: Tue January 6, 2026, 4:55 AM
Expires: Tue January 6, 2026, 5:00 PM

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches with amounts of 1 to 2 inches nearby Mammoth. Locally higher amounts of 10 to 16 inches near the South Entrance and up to 2 feet in southwestern portions of the park. Winds may gust as high as 50 mph at times. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult, especially in the backcountry.

Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .
Tuesday, January 6, 2026

Weather Forecast

Moderate or heavy snow showers
28.6°F
18.5°F
22.7°F
93%
0.14 in
65%
8%
12.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.41 μg/m3
PM10: 1.45 μg/m3
Carbon Monoxide: 136.93 μg/m3
Nitrogen Dioxide: 2.69 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 82.64 μg/m3

Astronomical

Sunrise: 8:03 AM
Sun Transit: 12:31 AM
Sunset: 5:00 PM
Daylight: 8 hrs 57 mins
Moonrise: 9:13 PM
Moon Transit: 3:16 AM
Moonset: 10:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
12:14 AM - 2:44 PM

Minor Periods

8:43 PM - 10:13 PM
9:50 AM - 11:20 AM

Action Rating: 2 out of 5

Wednesday, January 7, 2026

Weather Forecast

Moderate or heavy snow showers
29.1°F
16.5°F
21.7°F
91%
0.48 in
84%
29%
11.9 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.25 μg/m3
PM10: 1.29 μg/m3
Carbon Monoxide: 135.01 μg/m3
Nitrogen Dioxide: 2.26 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 82.2 μg/m3

Astronomical

Sunrise: 8:03 AM
Sun Transit: 12:31 AM
Sunset: 5:01 PM
Daylight: 8 hrs 59 mins
Moonrise: 10:25 PM
Moon Transit: 4:03 AM
Moonset: 10:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
1:00 PM - 3:30 PM

Minor Periods

9:55 PM - 11:25 PM
10:10 AM - 11:40 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Moderate or heavy snow showers
19.9°F
2.5°F
11.8°F
82%
0.11 in
73%
8%
8.1 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 2.34 μg/m3
PM10: 2.77 μg/m3
Carbon Monoxide: 138.77 μg/m3
Nitrogen Dioxide: 2.44 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 85.08 μg/m3

Astronomical

Sunrise: 8:02 AM
Sun Transit: 12:32 AM
Sunset: 5:02 PM
Daylight: 9 hrs mins
Moonrise: 11:32 PM
Moon Transit: 4:47 AM
Moonset: 10:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
1:42 PM - 4:12 PM

Minor Periods

12:00 AM - 12:00 AM
10:27 AM - 11:57 AM

Action Rating: 2 out of 5

Friday, January 9, 2026

Weather Forecast

Partly Cloudy
21.6°F
-7.4°F
6.8°F
87%
0 in
0%
12%
4.9 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 3.61 μg/m3
Carbon Monoxide: 146.84 μg/m3
Nitrogen Dioxide: 3.33 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 79.64 μg/m3

Astronomical

Sunrise: 8:02 AM
Sun Transit: 12:32 AM
Sunset: 5:03 PM
Daylight: 9 hrs 1 mins
Moonrise: 12:32 AM
Moon Transit: 5:29 AM
Moonset: 11:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
2:24 PM - 4:54 PM

Minor Periods

10:44 AM - 12:14 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Saturday, January 10, 2026

Weather Forecast

Freezing fog
23.5°F
-7.6°F
4.7°F
96%
0.01 in
72%
70%
5.1 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 2.17 μg/m3
PM10: 2.23 μg/m3
Carbon Monoxide: 175.18 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 75.69 μg/m3

Astronomical

Sunrise: 8:02 AM
Sun Transit: 12:33 AM
Sunset: 5:04 PM
Daylight: 9 hrs 3 mins
Moonrise: 12:39 AM
Moon Transit: 6:10 AM
Moonset: 11:31 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

5:40 AM - 8:10 AM
3:05 PM - 5:35 PM

Minor Periods

11:01 AM - 12:31 AM
12:09 AM - 1:39 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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