Napa weather in March 2026

Expect daytime maximum temperatures of 17°C in Napa, California in March based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 97 mm of rainfall in the month.

  • 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 hot is it in Napa in March?

Daytime temperatures usually reach 21°C in Napa in March, falling to 10°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 71% of daylight hours.

Does it rain in Napa in March?

There are usually 6 days with some rain in Napa in March and the average monthly rainfall is 67mm.

Napa March sunrise & sunset times

Browse the sunrise and sunset times for Napa in March 2026. Select a month to view Napa sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st March 2026 06:41 18:03
Monday, 16th March 2026 06:18 18:17
Tuesday, 31st March 2026 05:55 18:32

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