Weather in Napa in September 2019

  • 27°C maximum daytime temperature in September in Napa27
    27°C max day temperature
  • 10 hours of sunshine per day (80% of daylight hours) in September in Napa10
    10 hours of sunshine per day
  • 2 days with some rainfall in September in Napa2
    2 days with some rainfall
  • 11°C minimum night-time temperature in September in Napa11
    11°C min night temperature
  • 12 hours of daylight per day in September in Napa12
    12 hours of daylight per day
  • Moderate heat & humidity in September in NapaM
    Moderate heat & humidity
  • 10 mm monthly rainfall in September in Napa10
    10 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Napa7
    7 (High) UV index

Going to Napa? Find the best month to visit Napa based on the weather.

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Expect 27°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Napa in September. Check more long-term weather averages for Napa in September before you book your next holiday to California in 2019/2020.

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More about Napa

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

Guide to Napa weather in September

The average maximum daytime temperature in Napa in September is a warm 27°C (81°F) with moderate heat & humidity. The average night-time temperature is usually a cool 11°C (52°F). There are usually 10 hours of bright sunshine each day, which represents 80% of the 12 hours of daylight.

Expect 10mm (0.4 inches) of rainfall across the whole of September with 2 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

Napa sunrise & sunset times for September 2019

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 05:39 18:39
Monday, 2nd September 2019 05:39 18:38
Tuesday, 3rd September 2019 05:40 18:36
Wednesday, 4th September 2019 05:41 18:35
Thursday, 5th September 2019 05:42 18:33
Friday, 6th September 2019 05:43 18:31
Saturday, 7th September 2019 05:44 18:30
Sunday, 8th September 2019 05:45 18:28
Monday, 9th September 2019 05:46 18:27
Tuesday, 10th September 2019 05:46 18:25
Wednesday, 11th September 2019 05:47 18:24
Thursday, 12th September 2019 05:48 18:22
Friday, 13th September 2019 05:49 18:20
Saturday, 14th September 2019 05:50 18:19
Sunday, 15th September 2019 05:51 18:17
Monday, 16th September 2019 05:52 18:16
Tuesday, 17th September 2019 05:52 18:14
Wednesday, 18th September 2019 05:53 18:13
Thursday, 19th September 2019 05:54 18:11
Friday, 20th September 2019 05:55 18:09
Saturday, 21st September 2019 05:56 18:08
Sunday, 22nd September 2019 05:57 18:06
Monday, 23rd September 2019 05:58 18:05
Tuesday, 24th September 2019 05:59 18:03
Wednesday, 25th September 2019 05:59 18:02
Thursday, 26th September 2019 06:00 18:00
Friday, 27th September 2019 06:01 17:58
Saturday, 28th September 2019 06:02 17:57
Sunday, 29th September 2019 06:03 17:55
Monday, 30th September 2019 06:04 17:54
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