From sunrise to sunset, the weather forecast is looking good in Wine Country! Thanks to its mild, Mediterranean-like climate, Napa Valley is an idyllic place to visit year-round.

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Weather Season by Season

Spring

March – May

Spring is a lovely time to explore Napa Valley, when you’ll find blossoming flowers, vineyards showcasing the first signs of bud break, and fewer crowds. Though you may see patchy fog in the morning, rain becomes less frequent as the days start to warm, inviting mild temperatures that encourage more time outdoors.

Average High/Low: 68°F / 47°F
Average Rainfall: 1.8″

Summer

End of May – August

Napa Valley is a top destination during the summer months for visitors looking to make the most of the region’s long, hot days and pleasant evenings. Though it can get crowded, you can’t deny the appeal of lazy, sunshine-filled afternoons in Wine Country, when there’s not a cloud or raindrop in sight.

Average High/Low: 82°F / 55°F
Average Rainfall: 0.08″

Harvest

Late August – October

California beckons with lovely weather conditions all year long, but it’s hard to beat the magic of the harvest season in Wine Country. Thanks to average temperatures that are neither too hot nor too cold, it’s an ideal time to visit. Plus, the vineyards reveal brilliant shades of red and gold that make for a beautiful sight to see.

Average High/Low: 77°F / 50°F
Average Rainfall: 0.08″

Fall

Late September – Thanksgiving

Though fall in Napa is synonymous with harvest, most of the excitement surrounding crush begins to mellow out by mid-October as evening temperatures start to drop. While still pleasant during the day with high temperatures staying in the upper 60s, layers become more of a necessity in the early morning and at night when it can dip below 45 degrees. Sunny days are still the norm, but November brings more clouds and the occasional rain shower.

Average High/Low: 69°F / 41°F
Average Rainfall: 1.9”

Holidays

December – January

December is a wondrous time in Napa Valley, when festive events and gatherings add to the joy of the season. Average temperatures hover around 60 degrees during the day, dropping down into the 40s and sometimes 30s at night. Though you won’t find snow, precipitation is somewhat frequent, so don’t forget an umbrella and a rain jacket.

Average High/Low: 60°F / 42°F
Average Rainfall: 5.1″

Low Season

January – March

Winter may be the rainy season in Napa County, but with fewer crowds and more affordable lodging prices, it’s a great time to cozy up with a glass of red wine beside a fire. Despite the rain, you’ll still find clear, sunny days with a high temperature in the 50s, making Napa feel downright balmy compared to most of the country this time of year.

Average High/Low: 57°F / 38°F
Average Rainfall: 5.3″