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

Current Water Temperature

35.2°F

Measurement Time: Wednesday, January 7, 2026, 5:00 AM 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

27°F
Moderate snow
Moderate snow
13.4°F
24.6°F
85%
SW 19.7 mph
22.6 mph
11.7°F
21.6°F
0.09 in
0%
0 mi
1004 mbar
0.6

Five Day Weather Forecast

Moderate or heavy snow showers
Wed
H: 26°F
L: 16°F
Moderate or heavy snow showers
Thu
H: 17°F
L: 5°F
Light freezing rain
Fri
H: 14°F
L: 0°F
Light snow
Sat
H: 19°F
L: 0°F
Cloudy
Sun
H: 31°F
L: 1°F

Air Quality

AQI: 1 - Good
PM2.5: 0.78 μg/m3
PM10: 0.78 μg/m3
Carbon Monoxide: 136.68 μg/m3
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:29 AM
Sunset: 5:01 PM
Daylight: 9 hrs 1 mins
Moonrise: 10:23 PM
Moon Transit: 4:01 AM
Moonset: 10:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:31 AM - 6:01 AM
1:02 PM - 3:32 PM

Minor Periods

9:53 PM - 11:23 PM
10:07 AM - 11:37 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued January 6 at 12:34PM MST until January 7 at 5:00PM MST by NWS Riverton WY

Effective: Tue January 6, 2026, 12:34 PM
Expires: Wed January 7, 2026, 7:00 AM

* WHAT...Snow expected. Additional snow accumulations of 1 to 2 inches nearby Mammoth and higher accumulations of 10 to 14 inches near the South Entrance. Up to 2 feet of additional snow accumulations in southwest portions of Yellowstone. Widespread wind gusts of 25 to 35 mph, with higher elevations gusting up to 50 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult, especially in the backcountry. * ADDITIONAL DETAILS...Snowfall will vary between light to moderate intensity through Wednesday evening. The most likely period of moderate snowfall will be Tuesday evening through Wednesday morning.

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 .


Winter Weather Advisory issued January 6 at 12:34PM MST until January 7 at 5:00PM MST by NWS Riverton WY

Effective: Tue January 6, 2026, 12:34 PM
Expires: Wed January 7, 2026, 7:00 AM

* WHAT...Snow expected. Additional snow accumulations of 6 to 11 inches. Additional accumulations of 12 to 16 inches are expected in the higher elevations with amounts nearing 2 feet in the Tetons. Widespread wind gusts of 25 to 35 mph, with higher elevations gusting around 45 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult at times, especially over Teton and Togwotee Passes. * ADDITIONAL DETAILS...Snowfall will vary between light to moderate intensity through Wednesday evening. The most likely period of moderate snowfall will be Tuesday evening through Wednesday morning.

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 .


Winter Weather Advisory issued January 7 at 4:36AM MST until January 7 at 5:00PM MST by NWS Riverton WY

Effective: Wed January 7, 2026, 4:36 AM
Expires: Wed January 7, 2026, 5:00 PM

* WHAT...Snow. Additional snow accumulations of 6 to 12 inches. Winds gusting as high as 40 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult at times, especially 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 .


Winter Weather Advisory issued January 7 at 4:36AM MST until January 7 at 5:00PM MST by NWS Riverton WY

Effective: Wed January 7, 2026, 4:36 AM
Expires: Wed January 7, 2026, 5:00 PM

* WHAT...Snow. Additional snow accumulations of 6 to 12 inches along the plateaus of southwestern Yellowstone National Park. Generally 1 to 3 inches of additional accumulation elsewhere. Winds gusting as high as 40 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult, especially in the backcountry.

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 .


Winter Weather Advisory issued January 7 at 1:22AM MST until January 7 at 11:00PM MST by NWS Pocatello ID

Effective: Wed January 7, 2026, 1:22 AM
Expires: Wed January 7, 2026, 3:15 PM

* WHAT...Snow. Additional snow accumulations between 4 and 8 inches above 6 thousand feet and up to 4 inches below 6 thousand feet. Winds gusting as high as 40 mph. * WHERE...Sawtooth/Stanley Basin, Sun Valley Region, Big Hole Mountains, and Centennial Mountains - Island Park. * WHEN...Until 11 PM MST this evening. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Wednesday morning and evening commutes.

Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.


Wednesday, January 7, 2026

Weather Forecast

Moderate or heavy snow showers
26.1°F
15.7°F
21.5°F
90%
0.93 in
71%
47%
22.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.89 μg/m3
PM10: 2.06 μg/m3
Carbon Monoxide: 133.8 μg/m3
Nitrogen Dioxide: 1.89 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 83.2 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:29 AM
Sunset: 5:01 PM
Daylight: 9 hrs 1 mins
Moonrise: 10:23 PM
Moon Transit: 4:01 AM
Moonset: 10:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:31 AM - 6:01 AM
1:02 PM - 3:32 PM

Minor Periods

9:53 PM - 11:23 PM
10:07 AM - 11:37 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Moderate or heavy snow showers
16.9°F
4.5°F
11.7°F
83%
0.12 in
81%
10%
9.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.11 μg/m3
PM10: 1.21 μg/m3
Carbon Monoxide: 137.28 μg/m3
Nitrogen Dioxide: 1.72 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 84.52 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:30 AM
Sunset: 5:02 PM
Daylight: 9 hrs 3 mins
Moonrise: 11:30 PM
Moon Transit: 4:45 AM
Moonset: 10:55 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
1:44 PM - 4:14 PM

Minor Periods

12:00 AM - 12:00 AM
10:25 AM - 11:55 AM

Action Rating: 2 out of 5

Friday, January 9, 2026

Weather Forecast

Light freezing rain
13.6°F
0.4°F
7.8°F
87%
0 in
65%
16%
10.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 2.3 μg/m3
PM10: 2.97 μg/m3
Carbon Monoxide: 147.08 μg/m3
Nitrogen Dioxide: 1.87 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 85.32 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:30 AM
Sunset: 5:03 PM
Daylight: 9 hrs 4 mins
Moonrise: 12:30 AM
Moon Transit: 5:27 AM
Moonset: 11:12 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
2:26 PM - 4:56 PM

Minor Periods

10:42 AM - 12:12 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Saturday, January 10, 2026

Weather Forecast

Light snow
18.8°F
0.1°F
6.6°F
96%
0.02 in
77%
77%
7.6 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.78 μg/m3
PM10: 1.97 μg/m3
Carbon Monoxide: 154.79 μg/m3
Nitrogen Dioxide: 2.18 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 77.56 μg/m3

Astronomical

Sunrise: 7:58 AM
Sun Transit: 12:30 AM
Sunset: 5:04 PM
Daylight: 9 hrs 5 mins
Moonrise: 12:37 AM
Moon Transit: 6:08 AM
Moonset: 11:30 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

5:38 AM - 8:08 AM
3:07 PM - 5:37 PM

Minor Periods

11:00 AM - 12:30 AM
12:07 AM - 1:37 AM

Action Rating: 3 out of 5

Sunday, January 11, 2026

Weather Forecast

Cloudy
31.4°F
0.8°F
9.2°F
91%
0 in
0%
13%
4.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.28 μg/m3
PM10: 1.29 μg/m3
Carbon Monoxide: 171.56 μg/m3
Nitrogen Dioxide: 2.56 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 75.46 μg/m3

Astronomical

Sunrise: 7:58 AM
Sun Transit: 12:31 AM
Sunset: 5:05 PM
Daylight: 9 hrs 7 mins
Moonrise: 1:42 AM
Moon Transit: 6:50 AM
Moonset: 11:49 AM
Moon Phase: Last Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

6:20 AM - 8:50 AM
3:50 PM - 6:20 PM

Minor Periods

11:19 AM - 12:49 AM
1:12 AM - 2:42 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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