Water Temperature of the Firehole River in Yellowstone National Park, WY

Current Water Temperature

49.6°F

Measurement Time: Saturday, May 23, 2026, 6:00 PM MDT

Temperature Locations

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Local Points of Interest

Old Faithful; Alta, WY

Firehole River

Station Name: Firehole River at Old Faithful, YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,372 feet

Nearest Address:
Mallard Lake Trail
Yellowstone National Park, WY 82190
Teton County

GPS Coordinates: 44.4593333, -110.8222722

Nearby Water Temperatures

Firehole River, Yellowstone National Park, WY (11.3 mi)
Gibbon River, Yellowstone National Park, WY (12.7 mi)
Madison River, West Yellowstone, MT (18.2 mi)
Tantalus Creek, Yellowstone National Park, WY (19.6 mi)
Snake River, Flagg Ranch, WY (26.1 mi)
Boiling River Hot Springs, Yellowstone National Park, WY (36.9 mi)
Madison River, Grayling, MT (37.9 mi)
Lamar River, Yellowstone National Park, WY (38.6 mi)
Snake River, Moran, WY (43.1 mi)
Yellowstone River, Corwin Springs, MT (45.1 mi)
Buffalo Fork River, Moran, WY (46.9 mi)
Madison River, Cameron, MT (47.6 mi)
Blackrock Creek, Moran, WY (55.2 mi)
Snake River, Moose, WY (55.9 mi)
Fish Creek, Wilson, WY (66.3 mi)

Weather for Yellowstone National Park, Wyoming

Current Weather

38.6°F
Clear
Clear
34.3°F
38.6°F
59%
S 5.6 mph
11.7 mph
34.3°F
25.3°F
0 in
4%
6 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 65°F
L: 35°F
Patchy rain nearby
Mon
H: 68°F
L: 38°F
Moderate rain
Tue
H: 64°F
L: 39°F
Patchy rain nearby
Wed
H: 66°F
L: 40°F
Sunny
Thu
H: 67°F
L: 40°F

Air Quality

PM2.5: 3.58 μg/m3
PM10: 7.18 μg/m3
Carbon Monoxide: 126.68 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 109 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:20 PM
Sunset: 8:54 PM
Daylight: 15 hrs 7 mins
Moonrise: 2:27 PM
Moon Transit: 8:47 PM
Moonset: 2:37 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

5:04 AM - 7:34 AM
8:17 PM - 10:47 PM

Minor Periods

1:57 PM - 3:27 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Sunny
65.4°F
35.3°F
51°F
48%
0 in
0%
0%
15.7 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 3.72 μg/m3
PM10: 6.58 μg/m3
Carbon Monoxide: 122.32 μg/m3
Nitrogen Dioxide: 1.46 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 112.6 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:20 PM
Sunset: 8:54 PM
Daylight: 15 hrs 7 mins
Moonrise: 2:27 PM
Moon Transit: 8:47 PM
Moonset: 2:37 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

5:04 AM - 7:34 AM
8:17 PM - 10:47 PM

Minor Periods

1:57 PM - 3:27 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
67.9°F
38.4°F
52.4°F
58%
0.15 in
78%
0%
13 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.18 μg/m3
PM10: 7.87 μg/m3
Carbon Monoxide: 125.28 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 110.36 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:20 PM
Sunset: 8:55 PM
Daylight: 15 hrs 9 mins
Moonrise: 3:34 PM
Moon Transit: 9:28 PM
Moonset: 2:55 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

5:46 AM - 8:16 AM
8:58 PM - 11:28 PM

Minor Periods

3:04 PM - 4:34 PM
2:25 AM - 3:55 AM

Action Rating: 4 out of 5

Tuesday, May 26, 2026

Weather Forecast

Moderate rain
64.3°F
39.3°F
48.5°F
73%
0.31 in
74%
0%
10.5 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 4.97 μg/m3
PM10: 11.77 μg/m3
Carbon Monoxide: 122.37 μg/m3
Nitrogen Dioxide: 1.37 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 116.48 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:20 PM
Sunset: 8:56 PM
Daylight: 15 hrs 11 mins
Moonrise: 4:41 PM
Moon Transit: 10:10 PM
Moonset: 3:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

6:28 AM - 8:58 AM
12:00 AM - 12:00 AM

Minor Periods

4:11 PM - 5:41 PM
2:42 AM - 4:12 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
66°F
39.5°F
51.4°F
66%
0.05 in
88%
0%
14.8 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 4.86 μg/m3
PM10: 11.19 μg/m3
Carbon Monoxide: 127.56 μg/m3
Nitrogen Dioxide: 2.77 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 91 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:20 PM
Sunset: 8:57 PM
Daylight: 15 hrs 12 mins
Moonrise: 5:47 PM
Moon Transit: 10:53 PM
Moonset: 3:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

7:10 AM - 9:40 AM
12:00 AM - 12:00 AM

Minor Periods

5:17 PM - 6:47 PM
3:00 AM - 4:30 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Sunny
67.4°F
39.7°F
50.4°F
63%
0 in
0%
0%
11 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:20 PM
Sunset: 8:58 PM
Daylight: 15 hrs 14 mins
Moonrise: 6:54 PM
Moon Transit: 11:38 PM
Moonset: 3:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

7:53 AM - 10:23 AM
12:00 AM - 12:00 AM

Minor Periods

6:24 PM - 7:54 PM
3:21 AM - 4:51 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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