Boise weather in September (Idaho, United States of America)
Planning a trip to Boise in September? Check out this comprehensive weather guide.
In Boise the weather in September is generally perfect, with high temperatures and low rainfall. Throughout the daytime, temperatures often hover around 27°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 10°C.
Boise in September usually receives low rainfall, averaging around 13 mm for the month. Typically around 5 days of rainfall is expected.
With around 303 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.
If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. May, June, August, September and October generally stand out with the best circumstances. While January, November and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Boise climate page with graphs.
Boise, monthly averages in September
Min Temperature
10°C
Max Temperature
27°C
Chance of Rain
16%
Precipitation
13 mm
Rainy days
5 days
Humidity
45%
Sunshine
303 hours
Percentage Sunshine
81%
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Boise in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
This site provides you with all the information you need about the climate in Boise.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
