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
  17°C max day temperature
• 9
  9 hours of sunshine per day
• 10
  10 days with some rainfall
• 5
  5°C min night temperature
• 12
  12 hours of daylight per day
• 0
  No heat & humidity
• 97
  97 mm of monthly rainfall
• 5
  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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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.

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