Napa weather in April 2026

Expect daytime maximum temperatures of 20°C in Napa, California in April based on long-term weather averages. There are 11 hours of sunshine per day on average with typically 47 mm of rainfall in the month.

  • 20°C maximum daytime temperature in April in Napa20
    20°C max day temperature
  • 11 hours of sunshine per day
  • 6 days with some rainfall in April in Napa6
    6 days with some rainfall
  • 6°C minimum night-time temperature in April in Napa6
    6°C min night temperature
  • 13 hours of daylight per day in April in Napa13
    13 hours of daylight per day
  • No heat & humidity in April in Napa0
    No heat & humidity
  • 47 mm monthly rainfall in April in Napa47
    47 mm of monthly rainfall
  • UV (maximum) index 7 (High) in April in Napa7
    7 (High) UV index

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The April 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 April?

Daytime temperatures usually reach 20°C in Napa in April, falling to 6°C at night.

How sunny is it in Napa in April?

There are normally 11 hours of bright sunshine each day in Napa in April - that's 79% of daylight hours.

Does it rain in Napa in April?

There are usually 6 days with some rain in Napa in April and the average monthly rainfall is 47mm.

Napa April sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st April 2026 05:54 18:33
Wednesday, 15th April 2026 05:33 18:46
Thursday, 30th April 2026 05:13 19:00

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