Napa weather in March 2025

Expect 17°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Napa in March. Check more long-term weather averages for Napa in March before you book your next holiday to California in 2025/2026.

  • 17°C maximum daytime temperature in March in Napa17
    17°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in March in Napa10
    10 days with some rainfall
  • 5°C minimum night-time temperature in March in Napa5
    5°C min night temperature
  • 12 hours of daylight per day in March in Napa12
    12 hours of daylight per day
  • No heat & humidity in March in Napa0
    No heat & humidity
  • 97 mm monthly rainfall in March in Napa97
    97 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in March in Napa5
    5 (Moderate) UV index

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The March weather guide for California (Napa) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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

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More about California

How warm is it in Napa in March?

Daytime temperatures usually reach 17°C in Napa in March, falling to 5°C at night.

How sunny is it in Napa in March?

There are normally 9 hours of bright sunshine each day in Napa in March - that's 73% of daylight hours.

Does it rain in Napa in March?

There are usually 10 days with some rain in Napa in March and the average monthly rainfall is 97mm.

Napa March sunrise & sunset times

Browse the sunrise and sunset times for Napa in March 2025. Select a month to view Napa sunrise and sunset times for the next 12 months.


Date Sunrise times Sunset times
Saturday, 1st March 2025 06:40 18:03
Sunday, 16th March 2025 06:18 18:18
Monday, 31st March 2025 05:55 18:32

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