Water Temperature of the Firehole River in Yellowstone National Park, WY
Current Water Temperature
Measurement Time: Tuesday, May 20, 2025, 5:00 PM MDT
Temperature Locations
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Local Points of Interest
Old Faithful; Alta, WYSponsored Content
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

Humidity: 96%
Feels Like: 27.8°F
Wind: SW 5.1 mph
Wind Gusts: 10.8 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0
Five Day Weather Forecast

Tue
H: 48°F
L: 29°F

Wed
H: 46°F
L: 25°F

Thu
H: 55°F
L: 34°F

Fri
H: 57°F
L: 34°F

Sat
H: 58°F
L: 43°F
Air Quality
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 101 μg/m3
Astronomical
Sun Transit: 1:19 PM
Sunset: 8:50 PM
Daylight: 15 hrs mins
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 AM4:44 PM - 7:14 PM
Minor Periods
12:35 AM - 2:05 PM2:03 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.
Weather Forecast
Average Temperature: 37.2°F
Average Humidity: 67%
Wind: 15.9 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 111.56 μg/m3
Astronomical
Sun Transit: 1:19 PM
Sunset: 8:50 PM
Daylight: 15 hrs mins
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 AM4:44 PM - 7:14 PM
Minor Periods
12:35 AM - 2:05 PM2:03 AM - 3:33 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 36.6°F
Average Humidity: 72%
Wind: 12.8 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 1.96 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 103.08 μg/m3
Astronomical
Sun Transit: 1:19 PM
Sunset: 8:51 PM
Daylight: 15 hrs 2 mins
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 AM12:00 AM - 12:00 AM
Minor Periods
1:51 PM - 3:21 PM2:24 AM - 3:54 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 41.1°F
Average Humidity: 69%
Wind: 21.9 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:20 PM
Sunset: 8:52 PM
Daylight: 15 hrs 4 mins
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 AM10:16 AM - 12:46 AM
Minor Periods
3:07 PM - 4:37 PM2:43 AM - 4:13 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 45.7°F
Average Humidity: 55%
Wind: 14.8 mph
UV Index: 3
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:20 PM
Sunset: 8:53 PM
Daylight: 15 hrs 6 mins
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 PM9:37 AM - 12:07 AM
Minor Periods
4:27 PM - 5:57 PM3:04 AM - 4:34 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 49.4°F
Average Humidity: 53%
Wind: 19 mph
UV Index: 3
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:20 PM
Sunset: 8:54 PM
Daylight: 15 hrs 7 mins
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 PM10:30 AM - 1:00 PM
Minor Periods
5:50 PM - 7:20 PM3:26 AM - 4:56 AM
Action Rating: 2 out of 5