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 air72tier B
- Februarycool, a little rain, clean air78tier B
- Marchnice, rainy, clean air81tier A
- Aprilnice, dry, clean air96tier S
- Maywarm, dry, clean air95tier S
- Junehot, dry, clean air93tier S
- Julyhot, dry, clean air90tier S
- Augusthot, dry, clean air88tier A
- Septemberhot, dry, clean air90tier S
- Octoberwarm, dry, clean air92tier S
- Novembernice, a little rain, clean air84tier A
- Decembercool, rainy, clean air69tier C