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

Current Water Temperature

42.8°F

Measurement Time: Friday, November 21, 2025, 7:00 PM 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

30°F
Mist
Conditions: Mist
Humidity: 78%
Feels Like: 23°F
Wind: SW 7.2 mph
Wind Gusts: 8.2 mph
Pressure: 30.26 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Mist
Sat
H: 34°F
L: 22°F
Mist
Sun
H: 33°F
L: 21°F
Moderate or heavy snow showers
Mon
H: 22°F
L: 13°F
Light freezing rain
Tue
H: 19°F
L: 9°F
Patchy moderate snow
Wed
H: 16°F
L: 8°F

Air Quality

AQI: 1 - Good
PM2.5: 0.88 μg/m3
PM10: 0.88 μg/m3
Carbon Monoxide: 143.68 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:09 AM
Sunset: 4:50 PM
Daylight: 9 hrs 21 mins
Moonrise: 10:11 AM
Moon Transit: 2:11 PM
Moonset: 6:11 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:41 PM - 4:11 PM

Minor Periods

5:41 PM - 7:11 PM
9:41 AM - 11:11 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued November 21 at 1:47PM MST until November 22 at 10:00AM MST by NWS Pocatello ID

Effective: Fri November 21, 2025, 1:47 PM
Expires: Sat November 22, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Beaverhead - Lemhi Highlands, Centennial Mountains - Island Park, Teton Valley, Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...From 11 PM this evening to 10 AM MST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Saturday, November 22, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 27°F
Average Humidity: 93%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.67 μg/m3
PM10: 3.06 μg/m3
Carbon Monoxide: 137.48 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 71.64 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:09 AM
Sunset: 4:50 PM
Daylight: 9 hrs 21 mins
Moonrise: 10:11 AM
Moon Transit: 2:11 PM
Moonset: 6:11 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:41 PM - 4:11 PM

Minor Periods

5:41 PM - 7:11 PM
9:41 AM - 11:11 AM

Action Rating: 3 out of 5

Sunday, November 23, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 23.8°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 3.08 μg/m3
Carbon Monoxide: 122.96 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 80.84 μg/m3

Astronomical

Sunrise: 7:30 AM
Sun Transit: 12:09 AM
Sunset: 4:49 PM
Daylight: 9 hrs 19 mins
Moonrise: 10:59 AM
Moon Transit: 3:03 PM
Moonset: 7:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:33 PM - 5:03 PM

Minor Periods

6:40 PM - 8:10 PM
10:29 AM - 11:59 AM

Action Rating: 3 out of 5

Monday, November 24, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 17.7°F
Average Humidity: 72%
Chance of Rain: 66%
Wind: 21.3 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.71 μg/m3
PM10: 5.15 μg/m3
Carbon Monoxide: 133.28 μg/m3
Nitrogen Dioxide: 2.74 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 80.04 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:10 AM
Sunset: 4:48 PM
Daylight: 9 hrs 17 mins
Moonrise: 11:38 AM
Moon Transit: 3:54 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.9%

Best Times for Fishing or Hunting

Major Periods

12:06 AM - 2:36 AM
3:24 PM - 5:54 PM

Minor Periods

7:46 PM - 9:16 PM
11:08 AM - 12:38 AM

Action Rating: 2 out of 5

Tuesday, November 25, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 13.5°F
Average Humidity: 72%
Chance of Rain: 69%
Wind: 12.1 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.59 μg/m3
PM10: 3.43 μg/m3
Carbon Monoxide: 129.04 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 90.6 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:10 AM
Sunset: 4:48 PM
Daylight: 9 hrs 15 mins
Moonrise: 12:10 AM
Moon Transit: 4:43 PM
Moonset: 9:24 PM
Moon Phase: Waxing Crescent
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

12:56 AM - 3:26 AM
4:13 PM - 6:43 PM

Minor Periods

8:54 PM - 10:24 PM
11:40 AM - 1:10 PM

Action Rating: 2 out of 5

Wednesday, November 26, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: 11.5°F
Average Humidity: 81%
Chance of Rain: 89%
Wind: 13 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.93 μg/m3
PM10: 4.25 μg/m3
Carbon Monoxide: 135.29 μg/m3
Nitrogen Dioxide: 1.97 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 89.23 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:10 AM
Sunset: 4:47 PM
Daylight: 9 hrs 13 mins
Moonrise: 12:36 AM
Moon Transit: 5:30 PM
Moonset: 10:35 PM
Moon Phase: First Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
5:00 PM - 7:30 PM

Minor Periods

10:05 PM - 11:35 PM
12:06 AM - 1:36 PM

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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