Napa Valley weather in September
Hot and humid, and mostly sunny skies. Average highs of 30°C and lows of 15°C, with around 1 rainy day expected throughout the month.
✦ This is a recommended month to visit Napa Valley. The combination of weather, atmosphere and experience is at its best.
Average high
30°C
Average low
15°C
Rainy days
1 days
Best months to visit
May, June, July, August, September, October
What to do in Napa Valley in September
Whatever the weather, Napa Valley rewards curious visitors. Here are some of the best ways to spend your time:
Explore
Dine
Culture
Nature
Shopping
Day trips
What to pack for September
Light breathable clothing, high-SPF sunscreen, a wide-brimmed hat, and a reusable water bottle are essential. Pack sandals and at least one light layer for air-conditioned interiors.
Browse other months
January
14C
Cool, with occasional showers.
February
15C
Cool, with occasional showers.
March
16C
Cool, with occasional showers.
April
21C
Mild and comfortable, and mostly sunny skies.
Recommended
May
25C
Warm and pleasant, and mostly sunny skies.
Recommended
June
30C
Hot and humid, and mostly sunny skies.
Recommended
July
33C
Hot and humid, and mostly sunny skies.
Recommended
August
32C
Hot and humid, and mostly sunny skies.
Recommended
September (you are here)
30C
Hot and humid, and mostly sunny skies.
Recommended
October
25C
Warm and pleasant, and mostly sunny skies.
November
17C
Cool, with occasional showers.
December
13C
Cool, with some rainy days.
Book your September trip to Napa Valley
Find hotels, tours and experiences for the perfect escape.
