Boise weather by month
The best time to visit Boise, United States is September. Pick a month for full climate normals and a verdict.
- Januarycold, a little rain, clean air55tier D
- Februarycold, a little rain, clean air62tier C
- Marchcold, a little rain, clean air74tier B
- Aprilcool, a little rain, clean air82tier A
- Maynice, a little rain, clean air91tier S
- Junewarm, dry, clean air93tier S
- Julyhot, dry, clean air79tier B
- Augusthot, dry86tier A
- Septemberwarm, dry, clean air95tier S
- Octobercool, dry, clean air85tier A
- Novembercold, dry, clean air69tier C
- Decembercold, a little rain, clean air53tier D