Napa weather in August 2019

  • 28°C maximum daytime temperature in August in Napa28
    28°C max day temperature
  • 11 hours of sunshine per day (79% of daylight hours) in August in Napa11
    11 hours of sunshine per day
  • 1 day with some rainfall in August in Napa1
    1 day with some rainfall
  • 12°C minimum night-time temperature in August in Napa12
    12°C min night temperature
  • 14 hours of daylight per day in August in Napa14
    14 hours of daylight per day
  • Moderate heat & humidity in August in NapaM
    Moderate heat & humidity
  • 3 mm monthly rainfall in August in Napa3
    3 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Napa9
    9 (Very High) UV index

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Expect 28°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Napa in August. Check more long-term weather averages for Napa in August before you book your next holiday to California in 2019/2020.

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More about Napa

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The August weather guide for Napa, California 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)

Guide to Napa weather in August

The average maximum daytime temperature in Napa in August is a warm 28°C (82°F) with moderate heat & humidity. The average night-time temperature is usually a cool 12°C (54°F). There are usually 11 hours of bright sunshine each day, which represents 79% of the 14 hours of daylight.

Expect 3mm (0.1 inches) of rainfall across the whole of August with 1 day with some rain falling. Maximum UV levels will be very high (9 UV index) at midday when the skies are clear.

Napa sunrise & sunset times for August 2019

Browse the sunrise & sunset times for Napa in August 2019. Select a month to view Napa sunrise & sunset times for the next twelve months.

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Date Sunrise times Sunset times
Thursday, 1st August 2019 06:11 20:19
Friday, 2nd August 2019 06:12 20:18
Saturday, 3rd August 2019 06:13 20:17
Sunday, 4th August 2019 06:14 20:16
Monday, 5th August 2019 06:15 20:15
Tuesday, 6th August 2019 06:16 20:14
Wednesday, 7th August 2019 06:17 20:13
Thursday, 8th August 2019 06:17 20:11
Friday, 9th August 2019 06:18 20:10
Saturday, 10th August 2019 06:19 20:09
Sunday, 11th August 2019 06:20 20:08
Monday, 12th August 2019 06:21 20:07
Tuesday, 13th August 2019 06:22 20:05
Wednesday, 14th August 2019 06:23 20:04
Thursday, 15th August 2019 06:24 20:03
Friday, 16th August 2019 06:25 20:02
Saturday, 17th August 2019 06:25 20:00
Sunday, 18th August 2019 06:26 19:59
Monday, 19th August 2019 06:27 19:58
Tuesday, 20th August 2019 06:28 19:56
Wednesday, 21st August 2019 06:29 19:55
Thursday, 22nd August 2019 06:30 19:54
Friday, 23rd August 2019 06:31 19:52
Saturday, 24th August 2019 06:32 19:51
Sunday, 25th August 2019 06:32 19:49
Monday, 26th August 2019 06:33 19:48
Tuesday, 27th August 2019 06:34 19:46
Wednesday, 28th August 2019 06:35 19:45
Thursday, 29th August 2019 06:36 19:44
Friday, 30th August 2019 06:37 19:42
Saturday, 31st August 2019 06:38 19:41
  • Book cheap flights to California with Thomas Cook Airlines
  • Prices start from £219.99 one-way based on return flights
  • Depart from airports across the UK

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Popular California destinations

Below are average maximum temperatures at popular destinations in California in August. Select a destination to see more weather parameters.

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