Water Temperature of the Madison River in Grayling, MT

Current Water Temperature

59.9°F

Measurement Time: Friday, July 31, 2026, 6:45 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

54°F
Clear
Clear
48.6°F
54°F
38%
ESE 2.5 mph
5.2 mph
54.6°F
29°F
0 in
9%
6 mi
1020 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 87°F
L: 50°F
Sunny
Sun
H: 85°F
L: 49°F
Sunny
Mon
H: 69°F
L: 39°F
Sunny
Tue
H: 74°F
L: 34°F
Sunny
Wed
H: 77°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 12.4 μg/m3
Carbon Monoxide: 135 μg/m3
Nitrogen Dioxide: 9.2 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:31 PM
Sunset: 8:52 PM
Daylight: 14 hrs 40 mins
Moonrise: 10:15 PM
Moon Transit: 3:34 AM
Moonset: 9:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
12:30 AM - 3:00 PM

Minor Periods

9:45 PM - 11:15 PM
8:53 AM - 10:23 AM

Action Rating: 2 out of 5

Extreme Heat Warning issued July 31 at 12:06PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT

Effective: Fri July 31, 2026, 12:06 PM
Expires: Sat August 1, 2026, 6:15 AM

* WHAT...Dangerously hot conditions. High temperatures between 100 and 105 degrees expected. * WHERE...Gallatin Valley and Madison River Valley. * WHEN...From noon Saturday to 3 AM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. If you must spend time outdoors, wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 9:00PM MDT by NWS Missoula MT

Effective: Fri July 31, 2026, 1:11 PM
Expires: Fri July 31, 2026, 9:15 PM

...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From 2 PM Saturday to 9 PM MDT Sunday. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 20 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

Please advise the appropriate officials or fire crews in the field of this Red Flag Warning.
Saturday, August 1, 2026

Weather Forecast

Sunny
87.2°F
49.6°F
68.3°F
27%
0 in
0%
0%
16.1 mph
10.1


Air Quality

AQI: 1 - Good
PM2.5: 8.42 μg/m3
PM10: 12.1 μg/m3
Carbon Monoxide: 123.67 μg/m3
Nitrogen Dioxide: 4.54 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 100.04 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:31 PM
Sunset: 8:52 PM
Daylight: 14 hrs 40 mins
Moonrise: 10:15 PM
Moon Transit: 3:34 AM
Moonset: 9:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
12:30 AM - 3:00 PM

Minor Periods

9:45 PM - 11:15 PM
8:53 AM - 10:23 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
85.3°F
49.3°F
66.2°F
22%
0 in
0%
0%
16.3 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 7.24 μg/m3
PM10: 16.76 μg/m3
Carbon Monoxide: 133.5 μg/m3
Nitrogen Dioxide: 3.68 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 93.54 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:31 PM
Sunset: 8:50 PM
Daylight: 14 hrs 38 mins
Moonrise: 10:33 PM
Moon Transit: 4:50 PM
Moonset: 10:33 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

4:20 PM - 6:50 PM
4:20 PM - 6:50 PM

Minor Periods

10:03 PM - 11:33 PM
10:03 AM - 11:33 AM

Action Rating: 2 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
69.3°F
38.8°F
54.8°F
30%
0 in
1%
0%
10.5 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 3.25 μg/m3
PM10: 4.55 μg/m3
Carbon Monoxide: 104.88 μg/m3
Nitrogen Dioxide: 2.3 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 85.67 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:31 PM
Sunset: 8:49 PM
Daylight: 14 hrs 35 mins
Moonrise: 10:52 PM
Moon Transit: 5:00 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

4:30 AM - 7:00 AM
1:57 PM - 4:27 PM

Minor Periods

10:22 PM - 11:52 PM
11:13 AM - 12:43 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
74.4°F
34.4°F
54.6°F
36%
0 in
1%
0%
11.2 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 4.38 μg/m3
PM10: 5.06 μg/m3
Carbon Monoxide: 102.3 μg/m3
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 87.96 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 1:31 PM
Sunset: 8:48 PM
Daylight: 14 hrs 33 mins
Moonrise: 11:14 PM
Moon Transit: 5:46 AM
Moonset: 12:57 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:16 AM - 7:46 AM
2:44 PM - 5:14 PM

Minor Periods

12:00 AM - 12:00 AM
12:27 AM - 1:57 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Sunny
77.2°F
37.5°F
57.2°F
33%
0 in
1%
0%
9.8 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.61 μg/m3
PM10: 5.54 μg/m3
Carbon Monoxide: 126.86 μg/m3
Nitrogen Dioxide: 12.73 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 65.86 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:31 PM
Sunset: 8:46 PM
Daylight: 14 hrs 30 mins
Moonrise: 12:14 AM
Moon Transit: 6:35 AM
Moonset: 2:14 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

6:05 AM - 8:35 AM
3:35 PM - 6:05 PM

Minor Periods

1:44 PM - 3:14 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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