Boise weather in September 2019

  • 25°C maximum daytime temperature in September in Boise25
    25°C max day temperature
  • 10 hours of sunshine per day
  • 4 days with some rainfall in September in Boise4
    4 days with some rainfall
  • 8°C minimum night-time temperature in September in Boise8
    8°C min night temperature
  • 12 hours of daylight per day in September in Boise12
    12 hours of daylight per day
  • No heat & humidity in September in Boise0
    No heat & humidity
  • 19 mm monthly rainfall in September in Boise19
    19 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Boise6
    6 (High) UV index

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

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Expect 25°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Boise in September. Check more long-term weather averages for Boise in September before you book your next holiday to Idaho in 2019/2020.

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More about Boise

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The September weather guide for Boise, Idaho 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 Boise weather in September

The average maximum daytime temperature in Boise in September is a warm 25°C (77°F). The average night-time temperature is usually a cool 8°C (46°F). There are usually 10 hours of bright sunshine each day, which represents 80% of the 12 hours of daylight.

Expect 19mm (0.7 inches) of rainfall across the whole of September with 4 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.

Boise sunrise & sunset times for September 2019

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 07:08 20:20
Monday, 2nd September 2019 07:10 20:19
Tuesday, 3rd September 2019 07:11 20:17
Wednesday, 4th September 2019 07:12 20:15
Thursday, 5th September 2019 07:13 20:13
Friday, 6th September 2019 07:14 20:12
Saturday, 7th September 2019 07:15 20:10
Sunday, 8th September 2019 07:16 20:08
Monday, 9th September 2019 07:17 20:06
Tuesday, 10th September 2019 07:18 20:04
Wednesday, 11th September 2019 07:20 20:03
Thursday, 12th September 2019 07:21 20:01
Friday, 13th September 2019 07:22 19:59
Saturday, 14th September 2019 07:23 19:57
Sunday, 15th September 2019 07:24 19:55
Monday, 16th September 2019 07:25 19:53
Tuesday, 17th September 2019 07:26 19:52
Wednesday, 18th September 2019 07:27 19:50
Thursday, 19th September 2019 07:29 19:48
Friday, 20th September 2019 07:30 19:46
Saturday, 21st September 2019 07:31 19:44
Sunday, 22nd September 2019 07:32 19:42
Monday, 23rd September 2019 07:33 19:41
Tuesday, 24th September 2019 07:34 19:39
Wednesday, 25th September 2019 07:35 19:37
Thursday, 26th September 2019 07:36 19:35
Friday, 27th September 2019 07:38 19:33
Saturday, 28th September 2019 07:39 19:31
Sunday, 29th September 2019 07:40 19:30
Monday, 30th September 2019 07:41 19:28
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