Water Temperature of the Snake River in Flagg Ranch, WY

Current Water Temperature

51.6°F

Measurement Time: Tuesday, September 16, 2025, 3:30 AM MDT

Temperature Locations

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Snake River

Station Name: SNAKE RIVER AB JACKSON LAKE AT FLAGG RANCH WY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 6,818 feet / 2,078 meters

Nearest Address:
John D Rockefeller Jr Pkwy
Flagg Ranch, WY 83414
Teton County

GPS Coordinates: 44.09888889, -110.6675

Nearby Water Temperatures

Snake River, Moran, WY (17.1 mi)
Buffalo Fork River, Moran, WY (21.3 mi)
Firehole River, Yellowstone National Park, WY (26.1 mi)
Snake River, Moose, WY (30.8 mi)
Blackrock Creek, Moran, WY (31.6 mi)
Firehole River, Yellowstone National Park, WY (37.3 mi)
Gibbon River, Yellowstone National Park, WY (38.6 mi)
Fish Creek, Wilson, WY (42.6 mi)
Madison River, West Yellowstone, MT (43.3 mi)
Tantalus Creek, Yellowstone National Park, WY (43.8 mi)
Cache Creek, Jackson, WY (44.7 mi)
Flat Creek, Jackson, WY (44.7 mi)
Snake River, Jackson, WY (50.3 mi)
Hoback River, Hoback, WY (54.8 mi)
Lamar River, Yellowstone National Park, WY (58.9 mi)

Weather for Flagg Ranch, Wyoming

Current Weather

39.9°F
Cloudy
Conditions: Cloudy
Humidity: 83%
Feels Like: 38.4°F
Wind: NE 2.9 mph
Wind Gusts: 3.4 mph
Pressure: 30.36 in
Precipitation: 0 in
Cloud Cover: 25%
Visibility: 9 mi
UV Index: 0.8

Five Day Weather Forecast

Overcast
Tue
H: 61°F
L: 33°F
Sunny
Wed
H: 64°F
L: 35°F
Sunny
Thu
H: 64°F
L: 38°F
Partly Cloudy
Fri
H: 71°F
L: 37°F
Patchy rain nearby
Sat
H: 64°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 3.7 μg/m3
PM10: 5.92 μg/m3
Carbon Monoxide: 234.95 μg/m3
Nitrogen Dioxide: 0.37 μg/m3
Sulphur Dioxide: 0.19 μg/m3
Ozone: 122 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 1:17 PM
Sunset: 7:30 PM
Daylight: 12 hrs 27 mins
Moonrise: 1:02 AM
Moon Transit: 9:18 AM
Moonset: 5:22 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:48 AM - 11:18 AM
6:24 PM - 8:54 PM

Minor Periods

4:52 PM - 6:22 PM
12:32 AM - 2:02 AM

Action Rating: 2 out of 5

Freeze Warning issued September 15 at 10:45AM MDT until September 16 at 7:00AM MDT by NWS Riverton WY

Effective: Mon September 15, 2025, 10:45 AM
Expires: Tue September 16, 2025, 7:00 AM

* WHAT...Sub-freezing temperatures of 30 to 33 expected, with isolated areas as low as 28. * WHERE...Jackson Hole and Star Valley. * WHEN...From 1 AM to 7 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation, and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...There is an 80 percent chance of widespread temperatures of 32 or less occurring. Cloud cover could keep low temperatures warmer than is currently expected.

Take steps now to protect tender plants from the cold.


Freeze Warning issued September 15 at 10:45AM MDT until September 16 at 7:00AM MDT by NWS Riverton WY

Effective: Mon September 15, 2025, 10:45 AM
Expires: Tue September 16, 2025, 7:00 AM

* WHAT...Sub-freezing temperatures of 30 to 33 expected, with isolated areas as low as 28. * WHERE...Jackson Hole and Star Valley. * WHEN...From 1 AM to 7 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation, and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...There is an 80 percent chance of widespread temperatures of 32 or less occurring. Cloud cover could keep low temperatures warmer than is currently expected.

Take steps now to protect tender plants from the cold.
Tuesday, September 16, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 47.3°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 5.4 mph
UV Index: 1.2

Air Quality

AQI: 1 - Good
PM2.5: 6.16 μg/m3
PM10: 9.11 μg/m3
Carbon Monoxide: 239.32 μg/m3
Nitrogen Dioxide: 5.85 μg/m3
Sulphur Dioxide: 0.24 μg/m3
Ozone: 94.96 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 1:17 PM
Sunset: 7:30 PM
Daylight: 12 hrs 27 mins
Moonrise: 1:02 AM
Moon Transit: 9:18 AM
Moonset: 5:22 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:48 AM - 11:18 AM
6:24 PM - 8:54 PM

Minor Periods

4:52 PM - 6:22 PM
12:32 AM - 2:02 AM

Action Rating: 2 out of 5

Wednesday, September 17, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 49.9°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 3.6 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 4.79 μg/m3
PM10: 5.52 μg/m3
Carbon Monoxide: 234.14 μg/m3
Nitrogen Dioxide: 3.16 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 92.6 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 1:16 PM
Sunset: 7:28 PM
Daylight: 12 hrs 24 mins
Moonrise: 2:17 AM
Moon Transit: 10:12 AM
Moonset: 5:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

7:17 PM - 9:47 PM
9:42 AM - 12:12 AM

Minor Periods

5:24 PM - 6:54 PM
1:47 AM - 3:17 AM

Action Rating: 3 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 50.2°F
Average Humidity: 59%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 5.07 μg/m3
PM10: 6.28 μg/m3
Carbon Monoxide: 251.01 μg/m3
Nitrogen Dioxide: 7.02 μg/m3
Sulphur Dioxide: 0.27 μg/m3
Ozone: 88.76 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:16 PM
Sunset: 7:27 PM
Daylight: 12 hrs 21 mins
Moonrise: 3:31 AM
Moon Transit: 11:02 AM
Moonset: 6:19 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

8:05 PM - 10:35 PM
10:32 AM - 1:02 PM

Minor Periods

5:49 PM - 7:19 PM
3:01 AM - 4:31 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 52.9°F
Average Humidity: 37%
Chance of Rain: 0%
Wind: 8.7 mph
UV Index: 1.6

Air Quality

AQI: 1 - Good
PM2.5: 4.39 μg/m3
PM10: 6.33 μg/m3
Carbon Monoxide: 247.38 μg/m3
Nitrogen Dioxide: 6.58 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 95.48 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:16 PM
Sunset: 7:25 PM
Daylight: 12 hrs 18 mins
Moonrise: 4:43 AM
Moon Transit: 11:48 AM
Moonset: 6:40 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

8:50 PM - 11:20 PM
11:18 AM - 1:48 PM

Minor Periods

6:10 PM - 7:40 PM
4:13 AM - 5:43 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 51.3°F
Average Humidity: 52%
Chance of Rain: 78%
Wind: 17.4 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.3 μg/m3
PM10: 5.91 μg/m3
Carbon Monoxide: 274.65 μg/m3
Nitrogen Dioxide: 9.36 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 90.54 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:15 PM
Sunset: 7:23 PM
Daylight: 12 hrs 15 mins
Moonrise: 5:52 AM
Moon Transit: 12:31 AM
Moonset: 6:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:01 AM - 2:31 PM

Minor Periods

6:28 PM - 7:58 PM
5:22 AM - 6:52 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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