Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

40.6°F

Measurement Time: Saturday, April 25, 2026, 12:45 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

14.4°F
Overcast
Overcast
10.9°F
13.7°F
100%
NE 2.2 mph
3.8 mph
12.5°F
4.9°F
0 in
100%
9 mi
1012 mbar
0

Five Day Weather Forecast

Patchy snow nearby
Sat
H: 36°F
L: 6°F
Moderate or heavy snow showers
Sun
H: 36°F
L: 16°F
Moderate or heavy snow showers
Mon
H: 39°F
L: 20°F
Light sleet showers
Tue
H: 40°F
L: 18°F
Moderate or heavy snow showers
Wed
H: 42°F
L: 21°F

Air Quality

AQI: 1 - Good
PM2.5: 2.75 μg/m3
PM10: 3.65 μg/m3
Carbon Monoxide: 138.85 μg/m3
Nitrogen Dioxide: 0.95 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 124 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:23 PM
Sunset: 8:24 PM
Daylight: 14 hrs mins
Moonrise: 2:16 PM
Moon Transit: 9:22 PM
Moonset: 3:53 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

5:32 AM - 8:02 AM
8:52 PM - 11:22 PM

Minor Periods

1:46 PM - 3:16 PM
3:23 AM - 4:53 AM

Action Rating: 3 out of 5

Freeze Warning issued April 24 at 9:56AM MDT until April 25 at 10:00AM MDT by NWS Pocatello ID

Effective: Fri April 24, 2026, 9:56 AM
Expires: Sat April 25, 2026, 4:00 AM

* WHAT...Sub-freezing temperatures 20 to 25 except 25 to 28 Pocatello to Burley and Oakley. * WHERE...Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...From 9 PM this evening to 10 AM MDT Saturday. * 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.


Freeze Warning issued April 25 at 2:27AM MDT until April 25 at 10:00AM MDT by NWS Pocatello ID

Effective: Sat April 25, 2026, 2:27 AM
Expires: Sat April 25, 2026, 10:00 AM

* WHAT...Sub-freezing temperatures as low as 16. * WHERE...Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...Until 10 AM MDT this morning. * 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.
Saturday, April 25, 2026

Weather Forecast

Patchy snow nearby
36.3°F
5.7°F
21.6°F
73%
0.02 in
87%
13%
6.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 3.78 μg/m3
PM10: 4.61 μg/m3
Carbon Monoxide: 140.65 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 118.04 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:23 PM
Sunset: 8:24 PM
Daylight: 14 hrs mins
Moonrise: 2:16 PM
Moon Transit: 9:22 PM
Moonset: 3:53 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

5:32 AM - 8:02 AM
8:52 PM - 11:22 PM

Minor Periods

1:46 PM - 3:16 PM
3:23 AM - 4:53 AM

Action Rating: 3 out of 5

Sunday, April 26, 2026

Weather Forecast

Moderate or heavy snow showers
36.4°F
16.2°F
28.1°F
88%
0.13 in
85%
25%
5.4 mph
4.9


Air Quality

AQI: 1 - Good
PM2.5: 3.57 μg/m3
PM10: 4.69 μg/m3
Carbon Monoxide: 131.73 μg/m3
Nitrogen Dioxide: 3.13 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 136.8 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:23 PM
Sunset: 8:25 PM
Daylight: 14 hrs 2 mins
Moonrise: 3:27 PM
Moon Transit: 10:07 PM
Moonset: 4:15 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

6:19 AM - 8:49 AM
12:00 AM - 12:00 AM

Minor Periods

2:57 PM - 4:27 PM
3:45 AM - 5:15 AM

Action Rating: 3 out of 5

Monday, April 27, 2026

Weather Forecast

Moderate or heavy snow showers
39.2°F
20.1°F
29.9°F
87%
0.28 in
77%
31%
5.1 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 2.55 μg/m3
PM10: 3.23 μg/m3
Carbon Monoxide: 141.33 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 110.96 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:22 PM
Sunset: 8:26 PM
Daylight: 14 hrs 5 mins
Moonrise: 4:37 PM
Moon Transit: 10:49 PM
Moonset: 4:33 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

7:02 AM - 9:32 AM
12:00 AM - 12:00 AM

Minor Periods

4:07 PM - 5:37 PM
4:03 AM - 5:33 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Light sleet showers
40.2°F
17.5°F
29.6°F
84%
0.2 in
70%
10%
6.5 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 2.29 μg/m3
PM10: 2.8 μg/m3
Carbon Monoxide: 137.52 μg/m3
Nitrogen Dioxide: 2.6 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 126.04 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:22 PM
Sunset: 8:27 PM
Daylight: 14 hrs 8 mins
Moonrise: 5:44 PM
Moon Transit: 11:31 PM
Moonset: 4:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

7:44 AM - 10:14 AM
12:00 AM - 12:00 AM

Minor Periods

5:14 PM - 6:44 PM
4:20 AM - 5:50 AM

Action Rating: 3 out of 5

Wednesday, April 29, 2026

Weather Forecast

Moderate or heavy snow showers
42.1°F
21°F
30.9°F
84%
0.08 in
69%
13%
6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.46 μg/m3
PM10: 4.43 μg/m3
Carbon Monoxide: 148.03 μg/m3
Nitrogen Dioxide: 3.87 μg/m3
Sulphur Dioxide: 0.97 μg/m3
Ozone: 119.46 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 1:22 PM
Sunset: 8:29 PM
Daylight: 14 hrs 11 mins
Moonrise: 6:51 PM
Moon Transit: 12:00 AM
Moonset: 5:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:26 AM - 10:56 AM

Minor Periods

6:21 PM - 7:51 PM
4:37 AM - 6:07 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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