Late spring · Weather & things to do
Napa in May
Napa warms up: highs climb to 73°F (23°C), from 65°F in April, with lows of 47°F (9°C) and about 0.9 in (22 mm) of rain.
At 98/100 for comfort (2nd of 12), it's one of the best months to visit.
- Avg high
- 73°F (23°C)
- Avg low
- 47°F (9°C)
- Rain
- 0.9 in (22 mm)
- Humidity
- 69%
- Cloud cover
- 35%
- Daylight
- ~14 h 06 min
- Comfort score
- 98/100 · Great
What May feels like
Highs settle around 73°F (23°C), warm enough for short sleeves most of the day.
Mornings start much cooler: lows average 47°F (9°C), about 14°C (25°F) below the afternoon high.
It's one of the drier stretches, with only about 0.9 in (22 mm) of rain.
Sunny spells dominate: cloud cover averages 35%.
Plan around May
May is one of Napa's best months on the climate data.
- First warm month: highs reach 73°F, up from 65°F in April.
- Comfort improves from 95/100 in April to 98/100.
- May sits inside the Apr – Oct window our California Wine Country route recommends.
What to pack for May
- Light, breathable clotheshighs average 73°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- A warm layer for eveningslows near 47°F
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Napa in May
May is good outdoor weather here, so these picks lean toward the open air.
Napa Valley Wine Train
Restored vintage railcars serving multi-course meals on a 36-mile round trip.
Schramsberg Vineyards
Guided tour of hand-dug caves at a historic sparkling wine estate.
Bouchon Bakery
Thomas Keller's Yountville bakery for croissants and coffee.
Mustards Grill
Highway 29 roadhouse serving wine-country comfort food since 1983.
Domaine Carneros
Chateau-style sparkling wine house with a terrace over the vineyards.
Why now May scores 98/100 for comfort, good conditions for being outside.
Nearby in May
- Sonoma in May~18 mi · highs 76°F, 0.9 in rain · 2°C (3°F) warmer by day, about as wet
- Healdsburg in May~33 mi · highs 66°F, 1.2 in rain · 4°C (7°F) cooler by day, about as wet
- Old Sacramento Waterfront in May~42 mi · highs 80°F, 0.9 in rain · 4°C (7°F) warmer by day, about as wet
- San Francisco in May~51 mi · highs 66°F, 0.7 in rain · 4°C (6°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Napa in May: quick answers
Is May a good time to visit Napa?
Yes. On the climate data it's one of the best months, scoring 98/100. Expect highs of 73°F (23°C) and 0.9 in (22 mm) of rain. May is inside the Apr – Oct window our California Wine Country route recommends.
How hot is Napa in May?
Average highs are 73°F (23°C) and average lows 47°F (9°C), making it the 6th-warmest month by daytime highs.
Does it rain a lot in Napa in May?
Not much: about 0.9 in (22 mm) of rain falls across May on average, the 5th-driest month of the year. The annual total is about 27.1 in (689 mm).
What should I pack for Napa in May?
Bring light, breathable clothes (highs average 73°F), sunscreen, sunglasses and a hat (high UV on clear days), a warm layer for evenings (lows near 47°F) and comfortable walking shoes (most places below are best reached on foot or with short walks).
Routes in season in May
- California Wine Country Apr – Oct
Planning Napa in May?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.