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

Current Water Temperature

46.8°F

Measurement Time: Saturday, March 28, 2026, 6:00 PM MDT

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

40.2°F
Overcast
Overcast
34.8°F
40.2°F
50%
SSW 5.6 mph
11.7 mph
34.8°F
23.5°F
0 in
94%
6 mi
1015 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 46°F
L: 35°F
Heavy rain
Mon
H: 42°F
L: 20°F
Sunny
Tue
H: 36°F
L: 11°F
Moderate or heavy snow showers
Wed
H: 38°F
L: 29°F
Moderate or heavy snow in area with thunder
Thu
H: 31°F
L: 16°F

Air Quality

PM2.5: 4.68 μg/m3
PM10: 6.98 μg/m3
Carbon Monoxide: 133.68 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 1:27 PM
Sunset: 7:47 PM
Daylight: 12 hrs 38 mins
Moonrise: 4:24 PM
Moon Transit: 11:22 PM
Moonset: 5:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

7:36 AM - 10:06 AM
12:00 AM - 12:00 AM

Minor Periods

3:54 PM - 5:24 PM
5:15 AM - 6:45 AM

Action Rating: 4 out of 5

Sunday, March 29, 2026

Weather Forecast

Sunny
45.7°F
35.2°F
40.8°F
53%
0 in
0%
0%
21.3 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 5.1 μg/m3
PM10: 8.62 μg/m3
Carbon Monoxide: 133.52 μg/m3
Nitrogen Dioxide: 1.56 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 114.2 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 1:27 PM
Sunset: 7:47 PM
Daylight: 12 hrs 38 mins
Moonrise: 4:24 PM
Moon Transit: 11:22 PM
Moonset: 5:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

7:36 AM - 10:06 AM
12:00 AM - 12:00 AM

Minor Periods

3:54 PM - 5:24 PM
5:15 AM - 6:45 AM

Action Rating: 4 out of 5

Monday, March 30, 2026

Weather Forecast

Heavy rain
41.9°F
19.6°F
35.1°F
70%
1.19 in
83%
19%
22.8 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 4.77 μg/m3
PM10: 11.47 μg/m3
Carbon Monoxide: 119.04 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 103.92 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:27 PM
Sunset: 7:48 PM
Daylight: 12 hrs 41 mins
Moonrise: 5:35 PM
Moon Transit: 12:00 AM
Moonset: 6:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:22 AM - 10:52 AM

Minor Periods

5:05 PM - 6:35 PM
5:36 AM - 7:06 AM

Action Rating: 3 out of 5

Tuesday, March 31, 2026

Weather Forecast

Sunny
36°F
11.3°F
25.8°F
51%
0 in
0%
0%
12.3 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 2 μg/m3
PM10: 3.21 μg/m3
Carbon Monoxide: 131.69 μg/m3
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 111.24 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:27 PM
Sunset: 7:50 PM
Daylight: 12 hrs 44 mins
Moonrise: 6:44 PM
Moon Transit: 12:06 AM
Moonset: 6:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:06 AM - 11:36 AM

Minor Periods

6:14 PM - 7:44 PM
5:54 AM - 7:24 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Moderate or heavy snow showers
38.4°F
28.8°F
32.6°F
88%
0.74 in
88%
39%
15.7 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.51 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 141.46 μg/m3
Nitrogen Dioxide: 1.69 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 111 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 1:27 PM
Sunset: 7:51 PM
Daylight: 12 hrs 47 mins
Moonrise: 7:52 PM
Moon Transit: 12:49 AM
Moonset: 6:42 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
9:48 AM - 12:18 AM

Minor Periods

7:22 PM - 8:52 PM
6:12 AM - 7:42 AM

Action Rating: 4 out of 5

Thursday, April 2, 2026

Weather Forecast

Moderate or heavy snow in area with thunder
31°F
16.3°F
29.8°F
95%
0.52 in
74%
61%
21 mph
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: 7:02 AM
Sun Transit: 1:26 PM
Sunset: 7:52 PM
Daylight: 12 hrs 50 mins
Moonrise: 9:00 PM
Moon Transit: 1:31 AM
Moonset: 7:00 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
10:31 AM - 1:01 PM

Minor Periods

8:30 PM - 10:00 PM
6:30 AM - 8:00 AM

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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