Year-round weather and climate in Napa, United States
Average temperatures in Napa run from an average low of 5°C41°F in February up to an average high of 30°C86°F in August. July is the driest month at 0 rainy days; March the wettest at 14. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 80K
- Currency
- USD
- Language
- English
- Time zone
- Los Angeles
Best time to visit
The most pleasant weather falls in July, August, and September, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Tropical Downpours: Expect intense bursts of rain during wetter months. Pack quick-drying footwear and a compact umbrella.
Day-to-night swing
The Daypack Trap: Beware the "noon illusion". In months like July, crisp sunny days drop off a cliff by 17°C31°F at sunset. Always carry an evening layer.
Seasonality Profile
Mediterranean: Hot, bone-dry summers giving way to mild, occasionally wet winters.
Evening vibe
Seasonal Terraces: During the more temperate months, the city opens up with lively outdoor terraces. For the rest of the year, expect to dine indoors.
Sightseeing stamina
All-Day Strolling: Weather is generally forgiving for long walking days. Comfortable sneakers are your most important packing item.
Average temperatures, sunshine, and rainfall
Average monthly weather in Napa, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Jul is typically driest at 0 days (0mm); Mar the wettest at 14 days (182mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 14°C / 58°F | 5°C / 41°F | 7h | 9 | 185mm |
| Feb | 15°C / 58°F | 5°C / 40°F | 7h | 10 | 175mm |
| Mar | 15°C / 60°F | 6°C / 42°F | 8h | 14 | 182mm |
| Apr | 20°C / 68°F | 7°C / 45°F | 11h | 2 | 17mm |
| May | 24°C / 75°F | 10°C / 50°F | 13h | 3 | 16mm |
| Jun | 27°C / 80°F | 12°C / 53°F | 13h | 1 | 2mm |
| Jul | 30°C / 86°F | 13°C / 56°F | 13h | 0 | 0mm |
| Aug | 30°C / 87°F | 14°C / 57°F | 12h | 1 | 2mm |
| Sep | 28°C / 82°F | 13°C / 56°F | 11h | 2 | 8mm |
| Oct | 25°C / 77°F | 12°C / 53°F | 9h | 4 | 23mm |
| Nov | 18°C / 65°F | 8°C / 46°F | 8h | 9 | 111mm |
| Dec | 15°C / 59°F | 6°C / 43°F | 6h | 11 | 178mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit Napa?
The most sunshine in Napa comes around June, averaging 13 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for Napa?
Your packing list depends entirely on when you travel. Temperatures in Napa swing from an average low of 5°C41°F in February up to 30°C86°F in August. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for Napa?
Napa gets rain on about 66 days out of the year. The wettest month is March. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Napa with Packola.
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