Napa weather by month
The best time to visit Napa, United States is April. Pick a month for full climate normals and a verdict.
- Januarycool, rainy, clean air70tier B
- Februarycool, a little rain, clean air77tier B
- Marchnice, rainy, clean air80tier A
- Aprilnice, dry, clean air95tier S
- Maywarm, dry, clean air94tier S
- Junehot, dry, clean air92tier S
- Julyhot, dry, clean air88tier A
- Augusthot, dry, clean air85tier A
- Septemberhot, dry, clean air86tier A
- Octoberwarm, dry, clean air91tier S
- Novembernice, a little rain, clean air83tier A
- Decembercool, rainy, clean air68tier C