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

Current Water Temperature

43.0°F

Measurement Time: Wednesday, December 24, 2025, 7:00 AM MST

Temperature Locations

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Local Points of Interest

Old Faithful; Alta, WY

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Firehole River

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

Elevation Above Sea Level: 7,372 feet / 2,247 meters

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

37.6°F
Cloudy
Conditions: Cloudy
Humidity: 78%
Heat Index: 37.6°F
Feels Like: 30.2°F
Wind: SSE 7.5 mph
Wind Gusts: 8.6 mph
Wind Chill: 30.2°F
Air Pressure: 1012.35 Millibars
Dew Point: 31.2 F
Precipitation Probability: 86%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 7 mi
UV Index: 0

Five Day Weather Forecast

Moderate rain
Wed
H: 37°F
L: 31°F
Heavy snow
Thu
H: 35°F
L: 30°F
Moderate or heavy snow in area with thunder
Fri
H: 32°F
L: 19°F
Patchy moderate snow
Sat
H: 22°F
L: 8°F
Light snow
Sun
H: 27°F
L: 7°F

Air Quality

AQI: 1 - Good
PM2.5: 2.18 μg/m3
PM10: 2.48 μg/m3
Carbon Monoxide: 107.68 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 7:58 AM
Sun Transit: 12:23 AM
Sunset: 4:49 PM
Daylight: 8 hrs 51 mins
Moonrise: 11:02 AM
Moon Transit: 4:14 PM
Moonset: 9:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
3:44 PM - 6:14 PM

Minor Periods

9:07 PM - 10:37 PM
10:32 AM - 12:02 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued December 24 at 1:15AM MST until December 25 at 5:00PM MST by NWS Riverton WY

Effective: Wed December 24, 2025, 1:15 AM
Expires: Wed December 24, 2025, 5:00 PM

* WHAT...Snow expected. Total snow accumulations of 6 to 12 inches. Winds gusting as high as 45 mph. * WHERE...Wind River Mountains West and Teton and Gros Ventre Mountains. * WHEN...From 11 PM this evening to 5 PM MST Thursday. * IMPACTS...Travel could be difficult, including over Teton and Togwotee Passes.

Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .
Wednesday, December 24, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 33.9°F
Average Humidity: 87%
Chance of Rain: 66%
Wind: 14.1 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 5.22 μg/m3
PM10: 7.16 μg/m3
Carbon Monoxide: 103.28 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 83.48 μg/m3

Astronomical

Sunrise: 7:58 AM
Sun Transit: 12:23 AM
Sunset: 4:49 PM
Daylight: 8 hrs 51 mins
Moonrise: 11:02 AM
Moon Transit: 4:14 PM
Moonset: 9:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
3:44 PM - 6:14 PM

Minor Periods

9:07 PM - 10:37 PM
10:32 AM - 12:02 AM

Action Rating: 2 out of 5

Thursday, December 25, 2025

Weather Forecast

Conditions: Heavy snow
Average Temperature: 32.7°F
Average Humidity: 95%
Chance of Rain: 89%
Wind: 20.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.73 μg/m3
PM10: 1.9 μg/m3
Carbon Monoxide: 111.52 μg/m3
Nitrogen Dioxide: 1.48 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 82.8 μg/m3

Astronomical

Sunrise: 7:58 AM
Sun Transit: 12:23 AM
Sunset: 4:49 PM
Daylight: 8 hrs 51 mins
Moonrise: 11:22 AM
Moon Transit: 4:58 PM
Moonset: 10:47 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.7%

Best Times for Fishing or Hunting

Major Periods

1:14 AM - 3:44 AM
4:28 PM - 6:58 PM

Minor Periods

10:17 PM - 11:47 PM
10:52 AM - 12:22 AM

Action Rating: 3 out of 5

Friday, December 26, 2025

Weather Forecast

Conditions: Moderate or heavy snow in area with thunder
Average Temperature: 27.5°F
Average Humidity: 92%
Chance of Rain: 77%
Wind: 23.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.7 μg/m3
PM10: 5.52 μg/m3
Carbon Monoxide: 125.48 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 85.84 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:24 AM
Sunset: 4:50 PM
Daylight: 8 hrs 51 mins
Moonrise: 11:41 AM
Moon Transit: 5:43 PM
Moonset: 11:58 PM
Moon Phase: First Quarter
Moon Illumination: 40.5%

Best Times for Fishing or Hunting

Major Periods

1:59 AM - 4:29 AM
5:13 PM - 7:43 PM

Minor Periods

12:00 AM - 12:00 AM
11:11 AM - 12:41 AM

Action Rating: 3 out of 5

Saturday, December 27, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: 18.8°F
Average Humidity: 92%
Chance of Rain: 73%
Wind: 18.6 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.06 μg/m3
PM10: 2.73 μg/m3
Carbon Monoxide: 132.43 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 98.56 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:24 AM
Sunset: 4:51 PM
Daylight: 8 hrs 52 mins
Moonrise: 12:00 AM
Moon Transit: 2:23 AM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

1:53 AM - 4:23 AM
1:53 AM - 4:23 AM

Minor Periods

11:30 AM - 1:00 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Light snow
Average Temperature: 12.8°F
Average Humidity: 94%
Chance of Rain: 65%
Wind: 6.3 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 1.73 μg/m3
PM10: 2.06 μg/m3
Carbon Monoxide: 137.88 μg/m3
Nitrogen Dioxide: 1.52 μg/m3
Sulphur Dioxide: 1.06 μg/m3
Ozone: 102.62 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:25 AM
Sunset: 4:51 PM
Daylight: 8 hrs 52 mins
Moonrise: 12:21 AM
Moon Transit: 7:16 PM
Moonset: 1:12 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
6:46 PM - 9:16 PM

Minor Periods

11:51 AM - 1:21 PM
12:42 AM - 2:12 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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