Our verdict
The best time to visit Napa is May
In the summer months, temperatures can reach as high as 30℃ (86℉) in Napa. The weather at night in the winter can get down to temperatures as low as 3℃ (37℉).
If you’re keen to see the sights of Napa during the day, the sun stays up the longest around July. February sees the most amount of rain in a month if you’re ok with chancing getting drenched, so if you’re looking to stay dry, visit in August instead.
To learn everything you need to know (and none of the stuff you don’t) about when to visit Napa, keep reading below. Plus, you’ll find tools to help you get the best deals on travel and hotels too!
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Napa seasons
Before you continue, it’s important to know when the seasons are in Napa as they might be different to yours depending on where in the world you’re travelling from. Napa is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Napa
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Napa for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Napa climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Napa for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Napa in January
- Average temperature: 9℃ (49℉)
- Average high temperature: 14℃ (56℉)
- Average low temperature: 6℃ (42℉)
- Average humidity: 73%
- Average sunny days: 21 days
- Average rainfall: 56mm (2") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in January, make sure you pack a warm jacket or coat.
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Napa in February
- Average temperature: 10℃ (50℉)
- Average high temperature: 15℃ (59℉)
- Average low temperature: 6℃ (43℉)
- Average humidity: 73%
- Average sunny days: 20 days
- Average rainfall: 59mm (2") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in February, make sure you pack a warm jacket or coat.
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Napa in March
- Average temperature: 11℃ (53℉)
- Average high temperature: 17℃ (62℉)
- Average low temperature: 7℃ (44℉)
- Average humidity: 75%
- Average sunny days: 18 days
- Average rainfall: 46mm (2") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in March, make sure you pack a warm jacket or coat.
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Napa in April
- Average temperature: 14℃ (57℉)
- Average high temperature: 20℃ (67℉)
- Average low temperature: 8℃ (46℉)
- Average humidity: 69%
- Average sunny days: 22 days
- Average rainfall: 17mm (1") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in April, make sure you pack a warm jacket or coat.
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Napa in May
- Average temperature: 16℃ (61℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 10℃ (50℉)
- Average humidity: 66%
- Average sunny days: 26 days
- Average rainfall: 16mm (1") over 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in May, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
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Napa in June
- Average temperature: 19℃ (66℉)
- Average high temperature: 26℃ (80℉)
- Average low temperature: 12℃ (54℉)
- Average humidity: 60%
- Average sunny days: 28 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in June, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Napa in July
- Average temperature: 20℃ (68℉)
- Average high temperature: 28℃ (83℉)
- Average low temperature: 13℃ (56℉)
- Average humidity: 61%
- Average sunny days: 29 days
- Average rainfall: 1mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Napa in August
- Average temperature: 20℃ (68℉)
- Average high temperature: 28℃ (82℉)
- Average low temperature: 13℃ (56℉)
- Average humidity: 63%
- Average sunny days: 29 days
- Average rainfall: 1mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Napa in September
- Average temperature: 20℃ (68℉)
- Average high temperature: 28℃ (82℉)
- Average low temperature: 14℃ (56℉)
- Average humidity: 57%
- Average sunny days: 27 days
- Average rainfall: 2mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in September, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
Napa in October
- Average temperature: 17℃ (63℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 12℃ (53℉)
- Average humidity: 59%
- Average sunny days: 25 days
- Average rainfall: 17mm (1") over 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in October, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.
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Napa in November
- Average temperature: 12℃ (54℉)
- Average high temperature: 17℃ (63℉)
- Average low temperature: 8℃ (47℉)
- Average humidity: 67%
- Average sunny days: 22 days
- Average rainfall: 32mm (1") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in November, make sure you pack a warm jacket or coat.
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Napa in December
- Average temperature: 9℃ (48℉)
- Average high temperature: 13℃ (55℉)
- Average low temperature: 6℃ (42℉)
- Average humidity: 72%
- Average sunny days: 20 days
- Average rainfall: 54mm (2") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Napa in December, make sure you pack a warm jacket or coat.
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