| NWS Forecast for: Yellowstone National Park Issued by: National Weather Service Riverton, WY Last Update: 1231 PM MDT Wed Aug 19 2026 |  |
| This Afternoon: Sunny. Highs in the lower 70s. West winds around 10 mph with gusts up to 20 mph. Tonight: Clear. Lows in the mid 40s. West winds around 10 mph with gusts up to 20 mph in the evening. Thursday: Sunny. Highs in the mid 70s. South winds around 10 mph, becoming west with gusts up to 25 mph in the afternoon. Thursday Night: Partly cloudy. Lows in the upper 40s. Southwest winds around 10 mph in the evening. Friday: Mostly sunny. Highs in the upper 70s. West winds around 10 mph with gusts up to 20 mph in the afternoon. Friday Night: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 50s. Saturday: Mostly cloudy. A slight chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 60 percent. Saturday Night: Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the upper 40s. Chance of rain 40 percent. Sunday: Partly cloudy in the morning, then mostly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 40 percent. Sunday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 40s. Chance of rain 20 percent. Monday: Partly cloudy in the morning, then mostly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 30 percent. Monday Night: Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the mid 40s. Chance of rain 30 percent. Tuesday: Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs around 70. Chance of rain 30 percent. | |
| Zone Forecast: Yellowstone National Park | |
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