Normally, average daily temperatures in Yakima in May is 12 with a high of 21 and low being 6 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 12 |
| High Temperature | 21 |
| Low Temperature | 6 |
| Sunshine Per Day | 9 |
Useful Links: Yakima Weather: Average Weather & Yearly Climate