Click on a day for an hourly weather forecast
The temperatures in Yellowstone in May are comfortable with low of 13°C and and high up to 23°C.
You can expect rain for roughly half of the month of May in Yellowstone. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Yellowstone in May 2025.
If you’re planning to visit Yellowstone in the near future, we highly recommend that you review the 14 day weather forecast for Yellowstone before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -4° | 8 | 20 | 3 | 86 mm | Awful | Yellowstone in January |
| February | 6° / -3° | 8 | 17 | 4 | 104 mm | Awful | Yellowstone in February |
| March | 12° / 3° | 8 | 22 | 1 | 125 mm | Bad | Yellowstone in March |
| April | 18° / 7° | 9 | 21 | 0 | 151 mm | Ok | Yellowstone in April |
| May | 23° / 13° | 10 | 21 | 0 | 132 mm | Good | Yellowstone in May |
| June | 28° / 18° | 10 | 20 | 0 | 118 mm | Good | Yellowstone in June |
| July | 30° / 20° | 10 | 21 | 0 | 108 mm | Ok | Yellowstone in July |
| August | 29° / 19° | 8 | 23 | 0 | 80 mm | Ok | Yellowstone in August |
| September | 26° / 16° | 6 | 24 | 0 | 73 mm | Perfect | Yellowstone in September |
| October | 19° / 9° | 6 | 25 | 0 | 94 mm | Good | Yellowstone in October |
| November | 11° / 3° | 6 | 23 | 1 | 90 mm | Ok | Yellowstone in November |
| December | 6° / -1° | 8 | 21 | 2 | 103 mm | Awful | Yellowstone in December |