Yellowstone National Park weather

Q: What's the temperature like in Yellowstone National Park during May?

It's cold in Yellowstone National Park during May. The temperature tops out at around 9℃ during the day , falling away to -3℃ at night . Brrrr! 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, ice and snow increase UV exposure.

Q: Does it snow in Yellowstone National Park during May?

Yes, it's going to snow , and there will be ice and snow on the ground, so pack appropriate footwear and clothing.

Q: Does it rain in Yellowstone National Park during May?

May is typically the wettest month in Yellowstone National Park. On average, there will be 13 rainy days during the month, amounting to 122.4mm in total. That's a significant amount of rain . For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Of course, some of that rain will actually fall as sleet, snow, and possibly freezing rain. There's a good chance that you'll catch a thunderstorm during your trip.

Q: Is it windy in Yellowstone National Park during May?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in May. With cool air temperatures, any breeze will feel cold .

Our guide to the weather in Yellowstone National Park during May

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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 May.

What's the temperature like in Yellowstone National Park during May?

It's cold in Yellowstone National Park during May. The temperature tops out at around 9℃ during the day, falling away to -3℃ at night. Brrrr! 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, ice and snow increase UV exposure.

Does it snow in Yellowstone National Park during May?

Yes, it's going to snow, and there will be ice and snow on the ground, so pack appropriate footwear and clothing.

Does it rain in Yellowstone National Park during May?

May is typically the wettest month in Yellowstone National Park. On average, there will be 13 rainy days during the month, amounting to 122.4mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Of course, some of that rain will actually fall as sleet, snow, and possibly freezing rain. There's a good chance that you'll catch a thunderstorm during your trip.

Is it windy in Yellowstone National Park during May?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in May. With cool air temperatures, any breeze will feel cold.

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