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

Current Water Temperature

42.8°F

Measurement Time: Friday, January 2, 2026, 6:00 PM 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

30.9°F
Overcast
Overcast
24°F
26.9°F
92%
SSW 7.2 mph
9.1 mph
17.9°F
25.4°F
0 in
0%
6 mi
1019 mbar
0

Five Day Weather Forecast

Overcast
Sat
H: 33°F
L: 26°F
Moderate or heavy snow in area with thunder
Sun
H: 33°F
L: 28°F
Moderate or heavy snow in area with thunder
Mon
H: 28°F
L: 20°F
Blizzard
Tue
H: 26°F
L: 23°F
Blizzard
Wed
H: 25°F
L: 15°F

Air Quality

PM2.5: 0.98 μg/m3
PM10: 1.08 μg/m3
Carbon Monoxide: 118.68 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 8:00 AM
Sun Transit: 12:27 AM
Sunset: 4:56 PM
Daylight: 8 hrs 57 mins
Moonrise: 5:15 PM
Moon Transit: 12:22 AM
Moonset: 8:40 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:30 AM - 12:00 AM

Minor Periods

4:45 PM - 6:15 PM
8:10 AM - 9:40 AM

Action Rating: 5 out of 5

Saturday, January 3, 2026

Weather Forecast

Overcast
32.7°F
25.9°F
29.1°F
93%
0 in
0%
0%
8.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.03 μg/m3
PM10: 1.05 μg/m3
Carbon Monoxide: 139.92 μg/m3
Nitrogen Dioxide: 2.56 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 72.68 μg/m3

Astronomical

Sunrise: 8:00 AM
Sun Transit: 12:27 AM
Sunset: 4:56 PM
Daylight: 8 hrs 57 mins
Moonrise: 5:15 PM
Moon Transit: 12:22 AM
Moonset: 8:40 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:30 AM - 12:00 AM

Minor Periods

4:45 PM - 6:15 PM
8:10 AM - 9:40 AM

Action Rating: 5 out of 5

Sunday, January 4, 2026

Weather Forecast

Moderate or heavy snow in area with thunder
32.5°F
27.5°F
29.7°F
93%
1.34 in
83%
55%
15.7 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.85 μg/m3
PM10: 2.03 μg/m3
Carbon Monoxide: 126.12 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 88.48 μg/m3

Astronomical

Sunrise: 8:00 AM
Sun Transit: 12:28 AM
Sunset: 4:57 PM
Daylight: 8 hrs 58 mins
Moonrise: 6:37 PM
Moon Transit: 1:25 AM
Moonset: 9:21 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:55 AM - 3:25 AM
10:31 AM - 1:01 PM

Minor Periods

6:07 PM - 7:37 PM
8:51 AM - 10:21 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Moderate or heavy snow in area with thunder
27.5°F
19.9°F
25.7°F
91%
0.49 in
61%
48%
17.2 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.63 μg/m3
PM10: 1.85 μg/m3
Carbon Monoxide: 125.91 μg/m3
Nitrogen Dioxide: 1.71 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 85.92 μg/m3

Astronomical

Sunrise: 8:00 AM
Sun Transit: 12:28 AM
Sunset: 4:58 PM
Daylight: 8 hrs 59 mins
Moonrise: 7:57 PM
Moon Transit: 2:22 AM
Moonset: 9:53 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
11:26 AM - 1:56 PM

Minor Periods

7:27 PM - 8:57 PM
9:23 AM - 10:53 AM

Action Rating: 3 out of 5

Tuesday, January 6, 2026

Weather Forecast

Blizzard
25.9°F
23.2°F
24.5°F
92%
0.47 in
87%
65%
21.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.55 μg/m3
PM10: 3.81 μg/m3
Carbon Monoxide: 167.24 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 87.62 μg/m3

Astronomical

Sunrise: 7:59 AM
Sun Transit: 12:29 AM
Sunset: 4:59 PM
Daylight: 9 hrs mins
Moonrise: 9:12 PM
Moon Transit: 3:14 AM
Moonset: 10:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
12:16 AM - 2:46 PM

Minor Periods

8:42 PM - 10:12 PM
9:47 AM - 11:17 AM

Action Rating: 2 out of 5

Wednesday, January 7, 2026

Weather Forecast

Blizzard
25.1°F
14.6°F
23.8°F
95%
0.47 in
83%
60%
21 mph
1


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: 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

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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