Month guide · Napa Valley · United States
Napa Valley in August
What August is really like in Napa Valley: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Pictured: Calistoga mud baths and hot springs, Napa Valley · Photo: Oleg Alexandrov, CC BY-SA 3.0
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Quick answer
August is a shoulder-season month. Expect average highs of 31°C (88°F), lows of 12°C (54°F), almost no rainy days and roughly 13.6 hours of daylight. Hot and dry; harvest of sparkling-wine grapes begins late in the month.
Key facts
- Average high / low
- 31°C (88°F) / 12°C (54°F)
- Rainy days
- About 0
- Daylight
- About 13.6 hours
- Crowds
- Busy
- Hotel prices
- High
Plan a trip to Napa Valley
Compare flights, places to stay and rental cars, then book with the provider you choose.
Weather in August
August is the 2nd-warmest month in Napa Valley: days average 31°C (88°F) against a yearly average high of 23°C (73°F), and nights fall to about 12°C (54°F). Rain falls on roughly 0 of its 31 days. Compared with July (31°C (88°F)), August is about as warm; by September highs stay near 30°C (86°F).
- Sunrise (15 August)
- About 06:24
- Sunset (15 August)
- About 20:04
- Daylight
- About 13.6 hours
Summer (June–August). Warm to hot, dry days with cool nights; ideal for balloon flights and outdoor dining, busy at weekends.
Crowds and prices
On a 1–5 scale, August rates 4 for crowds (the peak is September at 5) and 4 for hotel prices (highest in September). Book accommodation early: August is one of the pricier months.
Events in August
- Harvest begins (usually mid-to-late August)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in August
Mild, settled days suit walking, viewpoints and time outdoors.
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Neighbourhood · Yountville
Yountville village
A walkable village on Washington Street with destination restaurants, bakeries, galleries and tasting rooms.
- Time needed
- 2–3 hours
- Cost
- Free
- Food
- Free
- Art
- Couples
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Experience · Downtown Napa
Napa Valley Wine Train
Choose a package with a winery stop if you want to taste along the way, and sit on the side facing the vineyards rather than Highway 29.
- Time needed
- 3–6 hours
- Cost
- Expensive
- Iconic
- Couples
- Food
- Views
Architecture · Carneros
Domaine Carneros
A sparkling-wine house founded by the Champagne house Taittinger, built in the style of an 18th-century French château on a hilltop in Carneros.
- Time needed
- 1.5 hours
- Cost
- Expensive
- Couples
- Views
- Architecture
- Food
Nature · Calistoga
Old Faithful Geyser of California
Ask at the entrance about the expected time of the next eruption so you do not miss it.
- Time needed
- 1 hour
- Cost
- Low cost
- Kids
- Nature
- Outdoors
What to pack
For highs near 31°C (88°F), lows near 12°C (54°F) and 0 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; comfortable walking shoes.
Is August a good time to visit Napa Valley?
A shoulder-season month, with a notable event on the calendar. If your dates are flexible, April–June and September–October are better overall. Compare every month.
Napa Valley in other months
Questions travellers ask
+What time does the sun set in Napa Valley in August?
At about 20:04 local time in mid-August, with sunrise at about 06:24: roughly 13.6 hours of daylight.
+How warm is Napa Valley in August?
Average highs are around 31°C (88°F) and lows around 12°C (54°F).
+Does it rain a lot in Napa Valley in August?
Expect rain on about 0 days of the month, so it is usually dry.