Normally, you can expect the weather in Yellowstone National Park during May is 5. Highs are expected to be 10 degrees with a low of -3 degrees. For more context we have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 5 |
| High Temperature | 10 |
| Low Temperature | -3 |
Useful Links: Yellowstone National Park Weather: Average Weather & Yearly Climate