Yellowstone National Park weather
Our guide to the weather in Yellowstone National Park during August
We've looked at the most up-to-date weather data for Yellowstone National Park, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Yellowstone National Park weather in August.
How warm is it in Yellowstone National Park during August?
The temperature reaches around 22℃ during the daytime in August, falling away to 5℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it snow in Yellowstone National Park during August?
Possibly. There's a chance of snow during August but not as much as you might think. Check the local forecast before you leave home so that you can pack appropriate footwear and clothing.
Does it rain in Yellowstone National Park during August?
On average, there will be 6 rainy days during the month, amounting to 58.2mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.
Is it windy in Yellowstone National Park during August?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in August. With moderate humidity and mild air temperatures, the breeze will have a slight cooling effect.
Weather in Yellowstone National Park
Our month-by-month guide to the weather and climate in Yellowstone National Park
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