Weather for Yellowstone National Park, Wyoming
Current Weather
Humidity: 90%
Heat Index: 20.8°F
Feels Like: 8.1°F
Wind: SW 9.3 mph
Wind Gusts: 28 mph
Wind Chill: 8.1°F
Dew Point: 8.1°F
Chance of Precipitation: 10%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast
Sat
H: 25°F
L: 11°F
Sun
H: 18°F
L: 5°F
Mon
H: 20°F
L: 6°F
Tue
H: 25°F
L: 9°F
Wed
H: 29°F
L: 8°F
Air Quality
Nitrogen Dioxide: 1.88 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 87 μg/m3
Astronomical
Sun Transit: 12:24 AM
Sunset: 4:50 PM
Daylight: 8 hrs 50 mins
Moon Transit: 2:23 AM
Moonset: 12:59 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%
Best Times for Fishing or Hunting
Major Periods
1:53 AM - 4:23 AM1:53 AM - 4:23 AM
Minor Periods
11:30 AM - 1:00 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Winter Storm Warning issued December 26 at 1:49PM MST until December 27 at 5:00PM MST by NWS Pocatello ID
Effective: Fri December 26, 2025, 1:49 PM
Expires: Sat December 27, 2025, 4:00 AM
* WHAT...Moderate to heavy snow expected. Total snow accumulations 4 to 10 inches. Winds gusting as high as 35 MPH. * WHERE...Centennial Mountains - Island Park. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute.
If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.
Winter Weather Advisory issued December 26 at 12:39PM MST until December 27 at 5:00PM MST by NWS Riverton WY
Effective: Fri December 26, 2025, 12:39 PM
Expires: Sat December 27, 2025, 5:00 AM
* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches across the lower elevations, and 8 to 14 inches across the higher elevations. Portions of southwestern YNP, such as Pitchstone Plateau, may see higher amounts nearing 20 inches. Winds from the southwest at 10 to 20 mph with periodic gusts up to 30 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel will be difficult in the backcountry. * ADDITIONAL DETAILS...Advisories have been extended through Saturday evening due to a second push of snow that will arrive early Saturday morning and linger into the afternoon.
Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .
Weather Forecast
Average Temperature: 20.8°F
Average Humidity: 79%
Wind: 18.3 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 0.82 μg/m3
Ozone: 95.4 μg/m3
Astronomical
Sun Transit: 12:24 AM
Sunset: 4:50 PM
Daylight: 8 hrs 50 mins
Moon Transit: 2:23 AM
Moonset: 12:59 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%
Best Times for Fishing or Hunting
Major Periods
1:53 AM - 4:23 AM1:53 AM - 4:23 AM
Minor Periods
11:30 AM - 1:00 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 10.9°F
Average Humidity: 61%
Wind: 6.9 mph
UV Index: 0.3
Air Quality
Nitrogen Dioxide: 3.02 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 90.84 μg/m3
Astronomical
Sun Transit: 12:25 AM
Sunset: 4:51 PM
Daylight: 8 hrs 51 mins
Moon Transit: 7:16 PM
Moonset: 1:12 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM6:46 PM - 9:16 PM
Minor Periods
11:50 AM - 1:20 PM12:42 AM - 2:12 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 12°F
Average Humidity: 81%
Wind: 5.6 mph
UV Index: 0.3
Air Quality
Nitrogen Dioxide: 3.78 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 86.28 μg/m3
Astronomical
Sun Transit: 12:25 AM
Sunset: 4:52 PM
Daylight: 8 hrs 52 mins
Moon Transit: 8:09 PM
Moonset: 2:30 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%
Best Times for Fishing or Hunting
Major Periods
4:19 AM - 6:49 AM7:39 PM - 10:09 PM
Minor Periods
12:14 AM - 1:44 PM2:00 AM - 3:30 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 14.6°F
Average Humidity: 93%
Wind: 5.1 mph
UV Index: 0.3
Air Quality
Nitrogen Dioxide: 3.68 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 91.69 μg/m3
Astronomical
Sun Transit: 12:26 AM
Sunset: 4:53 PM
Daylight: 8 hrs 52 mins
Moon Transit: 9:06 PM
Moonset: 3:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%
Best Times for Fishing or Hunting
Major Periods
5:13 AM - 7:43 AM8:36 PM - 11:06 PM
Minor Periods
12:44 AM - 2:14 PM3:21 AM - 4:51 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 12.8°F
Average Humidity: 94%
Wind: 3.4 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 12:26 AM
Sunset: 4:53 PM
Daylight: 8 hrs 53 mins
Moon Transit: 10:09 PM
Moonset: 5:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%
Best Times for Fishing or Hunting
Major Periods
6:13 AM - 8:43 AM12:00 AM - 12:00 AM
Minor Periods
1:24 PM - 2:54 PM4:45 AM - 6:15 AM
Action Rating: 2 out of 5