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The best time to visit Napa Valley
April, May, September and October — daytime highs around 26°C. Every number on this page is measured, not guessed.
Napa Valley month by month
| Month | Day | Night | Wet days | |
|---|---|---|---|---|
| January | 15°C | 5°C | 10 | |
| February | 17°C | 4°C | 6 | |
| March | 17°C | 5°C | 11 | Shoulder |
| April | 22°C | 7°C | 4 | Best |
| May | 26°C | 10°C | 3 | Best |
| June | 30°C | 13°C | 0 | Shoulder |
| July | 34°C | 15°C | 0 | |
| August | 34°C | 15°C | 0 | |
| September | 31°C | 14°C | 3 | Best |
| October | 25°C | 11°C | 5 | Best |
| November | 18°C | 7°C | 6 | Shoulder |
| December | 14°C | 5°C | 14 |
The short version
Warmest: July, around 34°C by day. Coolest: December, around 14°C by day and 5°C at night. Wettest: December with about 14 wet days. Driest: June with about 0.
If you want fewer people: March, June, November sit right beside the best months. The weather is close and the crowds are not.
Book it for those months
Prices climb as the good months fill up.
Common questions
When is the best time to visit Napa Valley?
The best months are April, May, September and October, when daytime highs sit around 26°C.
What is the hottest month in Napa Valley?
July, with daytime highs around 34°C.
What is the wettest month in Napa Valley?
December, with about 14 wet days. The driest is June with about 0.
When is the cheapest time to visit Napa Valley?
Prices follow the weather. The months either side of the best ones — March, June, November — are usually cheaper with similar conditions.
Temperatures and wet days are measured, not estimated: ERA5 reanalysis for 2021-2023, at Bothe-Napa Valley State Park, California. Source: Open-Meteo.