Water Temperature of the Boiling River Hot Springs in Yellowstone National Park, WY

Current Water Temperature

128.8°F

Measurement Time: Wednesday, July 29, 2026, 5:15 PM MDT

Temperature Locations

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Local Points of Interest

Gardner River; Mammoth Hot Springs; Cody, WY

Boiling River Hot Springs

Station Name: Boiling River at Mammoth,YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,686 feet

Nearest Address:
N Entrance Rd
Yellowstone National Park, WY 82190
Park County

GPS Coordinates: 44.9851333, -110.6893444

Nearby Water Temperatures

Yellowstone River, Corwin Springs, MT (10.1 mi)
Lamar River, Yellowstone National Park, WY (15 mi)
Tantalus Creek, Yellowstone National Park, WY (17.5 mi)
Gibbon River, Yellowstone National Park, WY (25.2 mi)
Firehole River, Yellowstone National Park, WY (26.6 mi)
Madison River, West Yellowstone, MT (29.3 mi)
Madison River, Grayling, MT (32.8 mi)
Firehole River, Yellowstone National Park, WY (36.9 mi)
Madison River, Cameron, MT (44.1 mi)
West Rosebud Creek, Roscoe, MT (51.7 mi)
Madison River, Ennis, MT (54.6 mi)
Madison River, Norris, MT (57.7 mi)
Snake River, Flagg Ranch, WY (61.2 mi)
Jefferson River, Three Forks, MT (76.8 mi)
Snake River, Moran, WY (78 mi)

Weather for Yellowstone National Park, Wyoming

Current Weather

47.2°F
Clear
Clear
38.7°F
47.2°F
86%
S 2.5 mph
5.2 mph
47.1°F
43.4°F
0 in
22%
6 mi
1017 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 86°F
L: 46°F
Sunny
Thu
H: 86°F
L: 43°F
Sunny
Fri
H: 89°F
L: 45°F
Sunny
Sat
H: 92°F
L: 47°F
Sunny
Sun
H: 90°F
L: 47°F

Air Quality

AQI: 1 - Good
PM2.5: 6.5 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 103 μg/m3
Nitrogen Dioxide: 5.4 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:29 PM
Sunset: 8:53 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:13 PM
Moon Transit: 1:17 AM
Moonset: 5:55 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
10:20 AM - 12:50 AM

Minor Periods

8:43 PM - 10:13 PM
5:25 AM - 6:55 AM

Action Rating: 4 out of 5

Fire Weather Watch issued July 29 at 8:45AM MDT until August 2 at 9:00PM MDT by NWS Missoula MT

Effective: Wed July 29, 2026, 8:45 AM
Expires: Fri July 31, 2026, 12:15 PM

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON AND CLEARWATER/NEZ PERCE... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A dry cold front on Saturday will bring critical fire weather conditions to the region. The National Weather Service in Missoula MT has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zones 110 and 111 in southwest Montana. * TIMING...From Saturday afternoon through Sunday evening. * WINDS...West winds 15 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...Relative Humidity between 5 to 20 percent. * Late Saturday night into Sunday morning, winds decrease to 5-15 mph with gusts up to 25 mph especially in higher terrain. Relative humidities recover into the 40% range above valley floors. Wind speeds increase and relative humidities drop again to critical thresholds by Sunday afternoon. * 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 Fire Weather Watch.
Wednesday, July 29, 2026

Weather Forecast

Sunny
85.7°F
46.2°F
63.8°F
50%
0.07 in
57%
0%
15.7 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 7.81 μg/m3
PM10: 12.71 μg/m3
Carbon Monoxide: 100.04 μg/m3
Nitrogen Dioxide: 3.08 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 90.42 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:29 PM
Sunset: 8:53 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:13 PM
Moon Transit: 1:17 AM
Moonset: 5:55 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
10:20 AM - 12:50 AM

Minor Periods

8:43 PM - 10:13 PM
5:25 AM - 6:55 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
86.3°F
42.6°F
64.8°F
48%
0 in
4%
0%
9.8 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 7.54 μg/m3
PM10: 9 μg/m3
Carbon Monoxide: 126.63 μg/m3
Nitrogen Dioxide: 4.06 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 93.42 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:29 PM
Sunset: 8:52 PM
Daylight: 14 hrs 46 mins
Moonrise: 9:35 PM
Moon Transit: 2:03 AM
Moonset: 7:03 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:33 AM - 4:03 AM
11:05 AM - 1:35 PM

Minor Periods

9:05 PM - 10:35 PM
6:33 AM - 8:03 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
89.1°F
45.4°F
67.1°F
33%
0 in
17%
0%
11.6 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 10.11 μg/m3
PM10: 11.37 μg/m3
Carbon Monoxide: 150.79 μg/m3
Nitrogen Dioxide: 4.37 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 100.58 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:29 PM
Sunset: 8:51 PM
Daylight: 14 hrs 43 mins
Moonrise: 9:54 PM
Moon Transit: 2:48 AM
Moonset: 8:12 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
11:49 AM - 2:19 PM

Minor Periods

9:24 PM - 10:54 PM
7:42 AM - 9:12 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
92°F
46.5°F
69°F
31%
0 in
0%
0%
14.1 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 9.02 μg/m3
PM10: 11.28 μg/m3
Carbon Monoxide: 142.21 μg/m3
Nitrogen Dioxide: 4.02 μg/m3
Sulphur Dioxide: 0.47 μg/m3
Ozone: 101.71 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:29 PM
Sunset: 8:49 PM
Daylight: 14 hrs 41 mins
Moonrise: 10:12 PM
Moon Transit: 3:31 AM
Moonset: 9:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

3:01 AM - 5:31 AM
12:00 AM - 12:00 AM

Minor Periods

9:42 PM - 11:12 PM
8:51 AM - 10:21 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
89.7°F
47°F
68.1°F
21%
0 in
0%
0%
17.2 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.53 μg/m3
PM10: 16.2 μg/m3
Carbon Monoxide: 132.08 μg/m3
Nitrogen Dioxide: 2.81 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 100.75 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:29 PM
Sunset: 8:48 PM
Daylight: 14 hrs 38 mins
Moonrise: 10:30 PM
Moon Transit: 4:50 PM
Moonset: 10:30 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

10:00 PM - 11:30 PM
10:00 AM - 11:30 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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