Typical May weather
Boise
Idaho · May
72° days
48° nights
about 4 rainy days · 14½ hours of daylight
What to pack
- Sweater
- Sunscreen
What May feels like
May is the greenest Boise gets, and everyone here knows the window shuts the moment the heat arrives. The Saturday market fills up downtown and the outfitters on the Payette open their rafting season on the back of the snowmelt.
Expect about 4 days with real rain — enough to notice, not enough to plan around. The air runs dry — whatever the thermometer says, it wears easy.
The numbers
| Typical high | 72° |
|---|---|
| Typical low | 48° |
| Days with real rain | 4 |
| Total rain | 1.4 in |
| Humidity | dry air |
| Sunrise / sunset (mid-month) | 6:19 am / 9:03 pm |