Weather for Yellowstone National Park, Wyoming
Current Weather
Humidity: 39%
Feels Like: 61°F
Wind: SW 14.1 mph
Wind Gusts: 22.1 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0
Five Day Weather Forecast
Thu
H: 71°F
L: 51°F
Fri
H: 59°F
L: 45°F
Sat
H: 64°F
L: 41°F
Sun
H: 69°F
L: 46°F
Mon
H: 77°F
L: 44°F
Air Quality
Nitrogen Dioxide: 2.18 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 96 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:40 PM
Daylight: 14 hrs 24 mins
Moon Transit: 12:00 AM
Moonset: 3:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM8:50 AM - 11:20 AM
Minor Periods
7:45 PM - 9:15 PM3:28 AM - 4:58 AM
Action Rating: 2 out of 5
Red Flag Warning issued August 7 at 1:12AM MDT until August 8 at 8:00PM MDT by NWS Riverton WY
Effective: Thu August 7, 2025, 1:12 AM
Expires: Thu August 7, 2025, 8:00 PM
* AFFECTED AREA: In Central WY Fire Zones...288...289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Wind increasing from the west to southwest at 15 to 25 mph with gusts up to around 40 mph today. Friday winds are from the west to northwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: As low as 10 percent.
A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
Red Flag Warning issued August 7 at 1:12AM MDT until August 8 at 8:00PM MDT by NWS Riverton WY
Effective: Thu August 7, 2025, 1:12 AM
Expires: Thu August 7, 2025, 8:00 PM
* AFFECTED AREA: In Central WY Fire Zones...288...289. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Wind increasing from the west to southwest at 15 to 25 mph with gusts up to around 40 mph today. Friday winds are from the west to northwest 15 to 25 mph with gusts up to 40 mph. * HUMIDITY: As low as 10 percent.
A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
Red Flag Warning issued August 7 at 6:00PM MDT until August 7 at 9:00PM MDT by NWS Pocatello ID
Effective: Thu August 7, 2025, 6:00 PM
Expires: Thu August 7, 2025, 9:00 PM
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM and Fire Weather Zone 413 Caribou Range/Caribou NF. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 16 percent. * IMPACTS...When coupled with extremely low fuel moistures, gusts of this magnitude and humidity below 15 percent leads to rapid fire spread rates and high intensity wildfires.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain.
Weather Forecast
Average Temperature: 61.3°F
Average Humidity: 32%
Wind: 22.6 mph
UV Index: 2.1
Air Quality
Nitrogen Dioxide: 4.15 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 105.6 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:40 PM
Daylight: 14 hrs 24 mins
Moon Transit: 12:00 AM
Moonset: 3:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM8:50 AM - 11:20 AM
Minor Periods
7:45 PM - 9:15 PM3:28 AM - 4:58 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 52.6°F
Average Humidity: 48%
Wind: 16.1 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 98.72 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:39 PM
Daylight: 14 hrs 21 mins
Moon Transit: 12:39 AM
Moonset: 5:11 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:09 AM - 2:39 AM9:43 AM - 12:13 AM
Minor Periods
8:14 PM - 9:44 PM4:41 AM - 6:11 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 53.8°F
Average Humidity: 44%
Wind: 11.4 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 2.62 μg/m3
Sulphur Dioxide: 0.09 μg/m3
Ozone: 90.84 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:37 PM
Daylight: 14 hrs 19 mins
Moon Transit: 1:30 AM
Moonset: 6:28 AM
Moon Phase: Full
Moon Illumination: 99.0%
Best Times for Fishing or Hunting
Major Periods
1:00 AM - 3:30 AM10:34 AM - 1:04 PM
Minor Periods
8:38 PM - 10:08 PM5:58 AM - 7:28 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 57.7°F
Average Humidity: 42%
Wind: 8.9 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 4.21 μg/m3
Sulphur Dioxide: 0.24 μg/m3
Ozone: 92.44 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:36 PM
Daylight: 14 hrs 16 mins
Moon Transit: 2:20 AM
Moonset: 7:44 AM
Moon Phase: Full
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
1:50 AM - 4:20 AM11:23 AM - 1:53 PM
Minor Periods
8:59 PM - 10:29 PM7:14 AM - 8:44 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 60.5°F
Average Humidity: 39%
Wind: 11.4 mph
UV Index: 2.5
Air Quality
Nitrogen Dioxide: 10.07 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 84.85 μg/m3
Astronomical
Sun Transit: 1:28 PM
Sunset: 8:35 PM
Daylight: 14 hrs 13 mins
Moon Transit: 3:08 AM
Moonset: 9:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 89.6%
Best Times for Fishing or Hunting
Major Periods
2:38 AM - 5:08 AM12:10 AM - 2:40 PM
Minor Periods
9:18 PM - 10:48 PM8:31 AM - 10:01 AM
Action Rating: 2 out of 5