Napa weather

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The weather guide for California (Napa) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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More about California

Which is the hottest month in Napa?

The hottest time of year in Napa is normally August. Expect maximum daytime temperatures to reach 28°C with moderate heat and humidity.

Which month has the most rain in Napa?

In terms of rainfall, January is usually the wettest month in Napa with 157mm on average. There are normally 10 days in January with some rain.

When is it sunniest in Napa?

The sunniest time of year in Napa is normally July with bright sunshine on average for 80% of daylight hours; that's 12 hours of sunshine per day.

What is the flight time to California from the UK?

The flight time to California from the UK is typically 11 hours.

What is the time difference between California and the UK?

The time difference between California and the UK is GMT-8 hours.

What is the main language spoken in California?

The main language spoken in California is English.

Learn a language for California with Busuu*, Lingoda* and Rocket Languages*.

What is the currency in California?

The currency in California is the US Dollar (USD).

Send money to California with XE Money Transfers*, World Remit* and Wise*.

Which plugs are used in California?

California uses electrical plug type A + B (120 Volts).

Which side of the road do they drive on in California?

They drive on the right side of the road in California.

Do you need a visa for California?

Yes, UK passport holders do need a visa to enter California.

Check USA visa requirements for all passport holders with VisaHQ* and iVisa.com*.

Compare Napa weather with the USA

Below the Napa weather chart shows average maximum daytime temperature for Napa, California, USA and the USA (Washington).

Maximum daytime temperature (°C)

Napa, California, USA
USA (Washington)
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Metric (°C / mm)  |  Imperial (°F / inches)

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