Weather for Yellowstone National Park, Wyoming
Current Weather
Humidity: 44%
Feels Like: 56.9°F
Wind: SSW 4 mph
Wind Gusts: 8.5 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0
Five Day Weather Forecast
Thu
H: 84°F
L: 42°F
Fri
H: 84°F
L: 44°F
Sat
H: 80°F
L: 46°F
Sun
H: 81°F
L: 45°F
Mon
H: 86°F
L: 40°F
Air Quality
Nitrogen Dioxide: 15.17 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 72 μg/m3
Astronomical
Sun Transit: 1:27 PM
Sunset: 8:30 PM
Daylight: 14 hrs 6 mins
Moon Transit: 5:32 AM
Moonset: 12:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 61.6%
Best Times for Fishing or Hunting
Major Periods
5:02 AM - 7:32 AM2:37 PM - 5:07 PM
Minor Periods
10:22 PM - 11:52 PM12:24 AM - 1:54 PM
Action Rating: 2 out of 5
Red Flag Warning issued August 14 at 1:03PM MDT until August 14 at 8:00PM MDT by NWS Riverton WY
Effective: Thu August 14, 2025, 1:03 PM
Expires: Thu August 14, 2025, 8:00 PM
* IMPACTS: Low Humidities...Very Dry Fuels...Warm Temperatures... Strong Gusty Winds...Dry Thunderstorms and outflow winds...and Increasing Thunderstorm Activity could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....288. In Northwest WY Fire Zones...140...286...415. In West Central WY Fire Zones...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. In Northwest WY...Yellowstone National Park. In West Central WY...Lincoln...Sublette...Teton. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: There is a 20 to 40 percent chance of thunderstorms, with gusty winds and frequent lightning being the main threats. * HUMIDITY: Higher elevations will see RHs around 20 percent, however lower valleys will see RHs around 15 percent. * TEMPERATURES: Highs in the mid 70s.
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 14 at 1:03PM MDT until August 14 at 8:00PM MDT by NWS Riverton WY
Effective: Thu August 14, 2025, 1:03 PM
Expires: Thu August 14, 2025, 8:00 PM
* IMPACTS: Low Humidities...Very Dry Fuels...Warm Temperatures... Strong Gusty Winds...Dry Thunderstorms and outflow winds...and Increasing Thunderstorm Activity could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zone....288. In Northwest WY Fire Zones...140...286...415. In West Central WY Fire Zones...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. In Northwest WY...Yellowstone National Park. In West Central WY...Lincoln...Sublette...Teton. * WIND: West 10 to 20 mph with gusts up to 30 mph. * THUNDERSTORMS: There is a 20 to 40 percent chance of thunderstorms, with gusty winds and frequent lightning being the main threats. * HUMIDITY: Higher elevations will see RHs around 20 percent, however lower valleys will see RHs around 15 percent. * TEMPERATURES: Highs in the mid 70s.
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.
Weather Forecast
Average Temperature: 60.4°F
Average Humidity: 51%
Wind: 25.3 mph
UV Index: 1.9
Air Quality
Nitrogen Dioxide: 8.9 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 95.16 μg/m3
Astronomical
Sun Transit: 1:27 PM
Sunset: 8:30 PM
Daylight: 14 hrs 6 mins
Moon Transit: 5:32 AM
Moonset: 12:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 61.6%
Best Times for Fishing or Hunting
Major Periods
5:02 AM - 7:32 AM2:37 PM - 5:07 PM
Minor Periods
10:22 PM - 11:52 PM12:24 AM - 1:54 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 63.5°F
Average Humidity: 39%
Wind: 16.3 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 6.82 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 96.12 μg/m3
Astronomical
Sun Transit: 1:27 PM
Sunset: 8:29 PM
Daylight: 14 hrs 3 mins
Moon Transit: 6:25 AM
Moonset: 2:16 PM
Moon Phase: Last Quarter
Moon Illumination: 50.4%
Best Times for Fishing or Hunting
Major Periods
5:55 AM - 8:25 AM3:31 PM - 6:01 PM
Minor Periods
12:00 AM - 12:00 AM1:46 PM - 3:16 PM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 62.2°F
Average Humidity: 41%
Wind: 12.8 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 6.07 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 101.04 μg/m3
Astronomical
Sun Transit: 1:26 PM
Sunset: 8:27 PM
Daylight: 14 hrs 1 mins
Moon Transit: 7:21 AM
Moonset: 3:36 PM
Moon Phase: Last Quarter
Moon Illumination: 39.1%
Best Times for Fishing or Hunting
Major Periods
6:51 AM - 9:21 AM4:30 PM - 7:00 PM
Minor Periods
3:06 PM - 4:36 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 60.7°F
Average Humidity: 41%
Wind: 14.8 mph
UV Index: 2
Air Quality
Nitrogen Dioxide: 8 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 98.88 μg/m3
Astronomical
Sun Transit: 1:26 PM
Sunset: 8:25 PM
Daylight: 13 hrs 58 mins
Moon Transit: 8:21 AM
Moonset: 4:51 PM
Moon Phase: Last Quarter
Moon Illumination: 28.4%
Best Times for Fishing or Hunting
Major Periods
7:51 AM - 10:21 AM5:30 PM - 8:00 PM
Minor Periods
4:21 PM - 5:51 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 62.1°F
Average Humidity: 42%
Wind: 14.8 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 9.79 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 89.46 μg/m3
Astronomical
Sun Transit: 1:26 PM
Sunset: 8:24 PM
Daylight: 13 hrs 55 mins
Moon Transit: 9:23 AM
Moonset: 5:55 PM
Moon Phase: Last Quarter
Moon Illumination: 18.9%
Best Times for Fishing or Hunting
Major Periods
8:53 AM - 11:23 AM6:32 PM - 9:02 PM
Minor Periods
5:25 PM - 6:55 PM12:23 AM - 1:53 AM
Action Rating: 2 out of 5