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

Current Water Temperature

46.8°F

Measurement Time: Tuesday, May 20, 2025, 5:00 PM MDT

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

32.7°F
Clear
Conditions: Clear
Humidity: 96%
Feels Like: 27.8°F
Wind: SW 5.1 mph
Wind Gusts: 10.8 mph
Pressure: 30.12 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 48°F
L: 29°F
Sunny
Wed
H: 46°F
L: 25°F
Sunny
Thu
H: 55°F
L: 34°F
Sunny
Fri
H: 57°F
L: 34°F
Sunny
Sat
H: 58°F
L: 43°F

Air Quality

PM2.5: 3.69 μg/m3
PM10: 11.24 μg/m3
Carbon Monoxide: 250.06 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 101 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:19 PM
Sunset: 8:50 PM
Daylight: 15 hrs mins
Moonrise: 2:33 AM
Moon Transit: 7:43 AM
Moonset: 1:05 PM
Moon Phase: Last Quarter
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
4:44 PM - 7:14 PM

Minor Periods

12:35 AM - 2:05 PM
2:03 AM - 3:33 AM

Action Rating: 2 out of 5

Frost Advisory issued May 20 at 1:52PM MDT until May 21 at 10:00AM MDT by NWS Pocatello ID

Effective: Tue May 20, 2025, 1:52 PM
Expires: Tue May 20, 2025, 8:00 PM

* WHAT...Temperatures as low as 27 will result in frost formation. * WHERE...Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, and Upper Snake River Plain. * WHEN...From midnight tonight to 10 AM MDT Wednesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Frost Advisory issued May 20 at 1:52PM MDT until May 21 at 10:00AM MDT by NWS Pocatello ID

Effective: Tue May 20, 2025, 1:52 PM
Expires: Tue May 20, 2025, 8:00 PM

* WHAT...Temperatures as low as 27 will result in frost formation. * WHERE...Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, and Upper Snake River Plain. * WHEN...From midnight tonight to 10 AM MDT Wednesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Tuesday, May 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 37.2°F
Average Humidity: 67%
Chance of Rain: 76%
Wind: 15.9 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 3.85 μg/m3
PM10: 6.38 μg/m3
Carbon Monoxide: 237.1 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 111.56 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:19 PM
Sunset: 8:50 PM
Daylight: 15 hrs mins
Moonrise: 2:33 AM
Moon Transit: 7:43 AM
Moonset: 1:05 PM
Moon Phase: Last Quarter
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
4:44 PM - 7:14 PM

Minor Periods

12:35 AM - 2:05 PM
2:03 AM - 3:33 AM

Action Rating: 2 out of 5

Wednesday, May 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 36.6°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 12.8 mph
UV Index: 2.3

Air Quality

AQI: 1 - Good
PM2.5: 3.5 μg/m3
PM10: 11.7 μg/m3
Carbon Monoxide: 248.12 μg/m3
Nitrogen Dioxide: 1.96 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 103.08 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:19 PM
Sunset: 8:51 PM
Daylight: 15 hrs 2 mins
Moonrise: 2:54 AM
Moon Transit: 8:30 AM
Moonset: 2:21 PM
Moon Phase: Last Quarter
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

8:00 AM - 10:30 AM
12:00 AM - 12:00 AM

Minor Periods

1:51 PM - 3:21 PM
2:24 AM - 3:54 AM

Action Rating: 2 out of 5

Thursday, May 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 41.1°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 21.9 mph
UV Index: 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: 5:48 AM
Sun Transit: 1:20 PM
Sunset: 8:52 PM
Daylight: 15 hrs 4 mins
Moonrise: 3:13 AM
Moon Transit: 10:46 AM
Moonset: 3:37 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

10:16 AM - 12:46 AM
10:16 AM - 12:46 AM

Minor Periods

3:07 PM - 4:37 PM
2:43 AM - 4:13 AM

Action Rating: 2 out of 5

Friday, May 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 45.7°F
Average Humidity: 55%
Chance of Rain: 0%
Wind: 14.8 mph
UV Index: 3

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: 5:48 AM
Sun Transit: 1:20 PM
Sunset: 8:53 PM
Daylight: 15 hrs 6 mins
Moonrise: 3:34 AM
Moon Transit: 10:07 AM
Moonset: 4:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

7:10 PM - 9:40 PM
9:37 AM - 12:07 AM

Minor Periods

4:27 PM - 5:57 PM
3:04 AM - 4:34 AM

Action Rating: 2 out of 5

Saturday, May 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 49.4°F
Average Humidity: 53%
Chance of Rain: 0%
Wind: 19 mph
UV Index: 3

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: 5:47 AM
Sun Transit: 1:20 PM
Sunset: 8:54 PM
Daylight: 15 hrs 7 mins
Moonrise: 3:56 AM
Moon Transit: 11:00 AM
Moonset: 6:20 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

8:03 PM - 10:33 PM
10:30 AM - 1:00 PM

Minor Periods

5:50 PM - 7:20 PM
3:26 AM - 4:56 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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