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

Current Water Temperature

34.5°F

Measurement Time: Tuesday, January 20, 2026, 7:00 PM MST

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

-2.9°F
Cloudy
Cloudy
-13.5°F
12.9°F
86%
S 4.7 mph
9.9 mph
1.3°F
11.3°F
0 in
0%
1 mi
1022 mbar
0

Five Day Weather Forecast

Cloudy
Wed
H: 22°F
L: 10°F
Mist
Thu
H: 19°F
L: 4°F
Mist
Fri
H: 16°F
L: 2°F
Partly Cloudy
Sat
H: 23°F
L: -6°F
Cloudy
Sun
H: 21°F
L: -2°F

Air Quality

AQI: 1 - Good
PM2.5: 2.68 μg/m3
PM10: 2.88 μg/m3
Carbon Monoxide: 156.68 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 90 μg/m3

Astronomical

Sunrise: 7:52 AM
Sun Transit: 12:34 AM
Sunset: 5:17 PM
Daylight: 9 hrs 25 mins
Moonrise: 9:28 AM
Moon Transit: 2:57 PM
Moonset: 8:39 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:27 PM - 4:57 PM

Minor Periods

8:09 PM - 9:39 PM
8:58 AM - 10:28 AM

Action Rating: 3 out of 5

Wednesday, January 21, 2026

Weather Forecast

Cloudy
21.7°F
9.7°F
14.6°F
87%
0 in
0%
0%
7.6 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 3.67 μg/m3
PM10: 3.95 μg/m3
Carbon Monoxide: 164.4 μg/m3
Nitrogen Dioxide: 1.86 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 88.92 μg/m3

Astronomical

Sunrise: 7:52 AM
Sun Transit: 12:34 AM
Sunset: 5:17 PM
Daylight: 9 hrs 25 mins
Moonrise: 9:28 AM
Moon Transit: 2:57 PM
Moonset: 8:39 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:27 PM - 4:57 PM

Minor Periods

8:09 PM - 9:39 PM
8:58 AM - 10:28 AM

Action Rating: 3 out of 5

Thursday, January 22, 2026

Weather Forecast

Mist
18.5°F
4.1°F
10°F
84%
0 in
0%
0%
4.3 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.97 μg/m3
PM10: 6.33 μg/m3
Carbon Monoxide: 161.56 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 90.84 μg/m3

Astronomical

Sunrise: 7:51 AM
Sun Transit: 12:34 AM
Sunset: 5:19 PM
Daylight: 9 hrs 27 mins
Moonrise: 9:47 AM
Moon Transit: 3:42 PM
Moonset: 9:50 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:12 PM - 5:42 PM

Minor Periods

9:20 PM - 10:50 PM
9:17 AM - 10:47 AM

Action Rating: 3 out of 5

Friday, January 23, 2026

Weather Forecast

Mist
16.2°F
2.3°F
7.1°F
79%
0 in
0%
0%
6.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.69 μg/m3
PM10: 6 μg/m3
Carbon Monoxide: 156.32 μg/m3
Nitrogen Dioxide: 2.71 μg/m3
Sulphur Dioxide: 1.06 μg/m3
Ozone: 86.84 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:35 AM
Sunset: 5:20 PM
Daylight: 9 hrs 30 mins
Moonrise: 10:06 AM
Moon Transit: 7:54 AM
Moonset: 11:02 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
7:24 AM - 9:54 AM

Minor Periods

12:00 AM - 12:00 AM
9:36 AM - 11:06 AM

Action Rating: 4 out of 5

Saturday, January 24, 2026

Weather Forecast

Partly Cloudy
22.7°F
-5.5°F
5.1°F
83%
0 in
0%
0%
6.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.36 μg/m3
PM10: 2.63 μg/m3
Carbon Monoxide: 147.6 μg/m3
Nitrogen Dioxide: 1.9 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 88.2 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:35 AM
Sunset: 5:21 PM
Daylight: 9 hrs 32 mins
Moonrise: 10:25 AM
Moon Transit: 5:13 PM
Moonset: 12:02 AM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:43 PM - 7:13 PM

Minor Periods

9:55 AM - 11:25 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Cloudy
20.8°F
-2.2°F
5°F
90%
0 in
0%
19%
12.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.37 μg/m3
PM10: 2.89 μg/m3
Carbon Monoxide: 155.12 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 96.46 μg/m3

Astronomical

Sunrise: 7:49 AM
Sun Transit: 12:35 AM
Sunset: 5:23 PM
Daylight: 9 hrs 34 mins
Moonrise: 10:47 AM
Moon Transit: 6:03 PM
Moonset: 12:17 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

2:15 AM - 4:45 AM
5:33 PM - 8:03 PM

Minor Periods

10:17 AM - 11:47 AM
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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