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

Current Water Temperature

40.3°F 4.6°C
Frigid Dangerously Cold
40.3°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Wednesday, November 11, 2026, 2:15 PM MST

Temperature Locations

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Local Points of Interest

Yellowstone River; Buffalo Ford, WY; Tower Junction, WY; Cody, WY

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Lamar River

Station Name: Lamar River nr Tower Ranger Station YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 6,024 feet

Nearest Address:
Tower Ranger Station
Yellowstone National Park, WY 82190
Park County

GPS Coordinates: 44.92817778, -110.3942694

Nearby Water Temperatures

Boiling River Hot Springs, Yellowstone National Park, WY (15 mi)
Tantalus Creek, Yellowstone National Park, WY (20.7 mi)
Yellowstone River, Corwin Springs, MT (23.3 mi)
Gibbon River, Yellowstone National Park, WY (30.3 mi)
Firehole River, Yellowstone National Park, WY (31.3 mi)
Madison River, West Yellowstone, MT (38 mi)
Firehole River, Yellowstone National Park, WY (38.6 mi)
West Rosebud Creek, Roscoe, MT (40.7 mi)
Madison River, Grayling, MT (46.4 mi)
Madison River, Cameron, MT (58.1 mi)
Snake River, Flagg Ranch, WY (58.9 mi)
Madison River, Ennis, MT (69.5 mi)
Madison River, Norris, MT (71.8 mi)
Snake River, Moran, WY (74.5 mi)
Buffalo Fork River, Moran, WY (75.4 mi)

Weather for Yellowstone National Park, Wyoming

Current Weather

39.2°F
Overcast
Conditions: Overcast
Humidity: 48%
Feels Like: 32.7°F
Wind: ESE 2.6 mph
Wind Gusts: 7.6 mph
Pressure: 30.14 in
Precipitation: 0 in
Cloud Cover: 82%
Visibility: 21.6 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Wed
H: 61°F
L: 34°F
Overcast
Thu
H: 62°F
L: 35°F
Overcast
Fri
H: 58°F
L: 36°F
Light Drizzle
Sat
H: 46°F
L: 31°F
Fog
Sun
H: 46°F
L: 29°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
0.8 μg/m³
Good
PM10
1 μg/m³
Good
Ozone (O3)
67 μg/m³
Photochemical
NO2
1.3 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
113 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 43m daylight
Sunrise 7:14 AM
Solar Noon 12:05 PM
Sunset 4:57 PM
Moon
New • 2%
Moonrise 10:02 AM
Transit 2:05 PM
Moonset 6:07 PM

Best Times for Fishing or Hunting

Major Periods

1:09 AM - 3:39 AM
1:35 PM - 4:05 PM

Minor Periods

9:32 AM - 11:02 AM
5:37 PM - 7:07 PM
Action Rating:
Good Action 3/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 43°F
Average Humidity: 51%
Chance of Rain: 1%
Wind: 8.9 mph
UV Index: 3.2

Air Quality

EPA Index 1 • Good
PM2.5
1 μg/m³
Good
PM10
1.4 μg/m³
Good
Ozone (O3)
68.8 μg/m³
Photochemical
NO2
0.9 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
115.2 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 43m daylight
Sunrise 7:14 AM
Solar Noon 12:05 PM
Sunset 4:57 PM
Moon
New • 2%
Moonrise 10:02 AM
Transit 2:05 PM
Moonset 6:07 PM

Best Times for Fishing or Hunting

Major Periods

1:09 AM - 3:39 AM
1:35 PM - 4:05 PM

Minor Periods

9:32 AM - 11:02 AM
5:37 PM - 7:07 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.5°F
Average Humidity: 33%
Chance of Rain: 0%
Wind: 7.5 mph
UV Index: 2.8

Air Quality

EPA Index 1 • Good
PM2.5
1 μg/m³
Good
PM10
1.7 μg/m³
Good
Ozone (O3)
76.5 μg/m³
Photochemical
NO2
0.9 μg/m³
Nitrogen Dioxide
SO2
0.2 μg/m³
Sulfur Dioxide
CO
114.6 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 41m daylight
Sunrise 7:15 AM
Solar Noon 12:05 PM
Sunset 4:56 PM
Moon
Waxing Crescent • 6%
Moonrise 10:55 AM
Transit 2:56 PM
Moonset 7:00 PM

Best Times for Fishing or Hunting

Major Periods

2:01 AM - 4:31 AM
2:26 PM - 4:56 PM

Minor Periods

10:25 AM - 11:55 AM
6:30 PM - 8:00 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 44.6°F
Average Humidity: 38%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 2.6

Air Quality

EPA Index 1 • Good
PM2.5
1.5 μg/m³
Good
PM10
2.2 μg/m³
Good
Ozone (O3)
88 μg/m³
Photochemical
NO2
0.8 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
119.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 38m daylight
Sunrise 7:16 AM
Solar Noon 12:05 PM
Sunset 4:55 PM
Moon
Waxing Crescent • 13%
Moonrise 11:39 AM
Transit 3:47 PM
Moonset 7:59 PM

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
3:17 PM - 5:47 PM

Minor Periods

11:09 AM - 12:39 PM
7:29 PM - 8:59 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 37.6°F
Average Humidity: 78%
Chance of Rain: 11%
Wind: 6.5 mph
UV Index: 2.4

Air Quality

EPA Index 1 • Good
PM2.5
1.7 μg/m³
Good
PM10
2.2 μg/m³
Good
Ozone (O3)
91.7 μg/m³
Photochemical
NO2
0.5 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
117.8 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 36m daylight
Sunrise 7:18 AM
Solar Noon 12:06 PM
Sunset 4:54 PM
Moon
Waxing Crescent • 21%
Moonrise 12:15 PM
Transit 4:35 PM
Moonset 9:03 PM

Best Times for Fishing or Hunting

Major Periods

3:41 AM - 6:11 AM
4:05 PM - 6:35 PM

Minor Periods

11:45 AM - 1:15 PM
8:33 PM - 10:03 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Fog
Average Temperature: 35.2°F
Average Humidity: 74%
Chance of Rain: 9%
Wind: 7.1 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
0.9 μg/m³
Good
PM10
1.4 μg/m³
Good
Ozone (O3)
83.1 μg/m³
Photochemical
NO2
0.4 μg/m³
Nitrogen Dioxide
SO2
0.1 μg/m³
Sulfur Dioxide
CO
117.6 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 34m daylight
Sunrise 7:19 AM
Solar Noon 12:06 PM
Sunset 4:53 PM
Moon
Waxing Crescent • 31%
Moonrise 12:43 PM
Transit 5:22 PM
Moonset 10:09 PM

Best Times for Fishing or Hunting

Major Periods

4:30 AM - 7:00 AM
4:52 PM - 7:22 PM

Minor Periods

12:13 PM - 1:43 PM
9:39 PM - 11:09 PM
Action Rating:
Very Good 4/5
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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