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Best time to visit Boise, ID, USA

Our verdict

The best time to visit Boise is September-November

Boise is a place lots of people visit almost all year round, but if you’re looking for the best time to go, September-November is definitely the time you should visit. This is based on a number of factors such as the weather, cost of flights and accommodation, peak travel periods and more.

During the warmer months, temperatures in Boise can rise to a maximum of 35℃ (95℉). The coldest it usually gets in winter-time in Boise is around 16℃ (60℉).

If you’re keen to see the sights of Boise during the day, the sun stays up the longest around July. To stay dry, avoid travelling to Boise in May – It’s the wettest month of the year.

Keep reading to find out more detailed information about the seasons and climate in Boise, as well as our favourite tools to help you find the best options for transport, accommodation, and much more.

Warmest month

July

Least rainfall

January

Most daylight

July

Boise seasons

Before you continue, it’s important to know when the seasons are in Boise as they might be different to yours depending on where in the world you’re travelling from. Boise is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in Boise

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Boise for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

Boise climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Boise for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Boise in January

  • Average temperature: 22℃ (72℉)
  • Average high temperature: 29℃ (84℉)
  • Average low temperature: 17℃ (63℉)
  • Average humidity: 75%
  • Average sunny days: 21 days
  • Average rainfall: 9mm (0") over 8 days
21 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Boise in January, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Boise in February

  • Average temperature: 23℃ (74℉)
  • Average high temperature: 30℃ (85℉)
  • Average low temperature: 18℃ (65℉)
  • Average humidity: 71%
  • Average sunny days: 17 days
  • Average rainfall: 14mm (1") over 8 days
17 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Boise in February, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Boise in March

  • Average temperature: 24℃ (75℉)
  • Average high temperature: 30℃ (85℉)
  • Average low temperature: 19℃ (65℉)
  • Average humidity: 71%
  • Average sunny days: 13 days
  • Average rainfall: 35mm (1") over 15 days
13 days
of pure sunshine
15 days
of showers or rain

What to pack: If you’re heading to Boise in March, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Boise in April

  • Average temperature: 25℃ (77℉)
  • Average high temperature: 31℃ (87℉)
  • Average low temperature: 20℃ (68℉)
  • Average humidity: 71%
  • Average sunny days: 9 days
  • Average rainfall: 58mm (2") over 19 days
9 days
of pure sunshine
19 days
of showers or rain

What to pack: If you’re heading to Boise in April, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Boise in May

  • Average temperature: 25℃ (78℉)
  • Average high temperature: 31℃ (88℉)
  • Average low temperature: 20℃ (69℉)
  • Average humidity: 73%
  • Average sunny days: 7 days
  • Average rainfall: 107mm (4") over 23 days
7 days
of pure sunshine
23 days
of showers or rain

What to pack: If you’re heading to Boise in May, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.


Boise in June

  • Average temperature: 26℃ (79℉)
  • Average high temperature: 32℃ (90℉)
  • Average low temperature: 21℃ (69℉)
  • Average humidity: 71%
  • Average sunny days: 12 days
  • Average rainfall: 47mm (2") over 15 days
12 days
of pure sunshine
15 days
of showers or rain

What to pack: If you’re heading to Boise in June, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.


Boise in July

  • Average temperature: 26℃ (79℉)
  • Average high temperature: 33℃ (91℉)
  • Average low temperature: 21℃ (69℉)
  • Average humidity: 71%
  • Average sunny days: 10 days
  • Average rainfall: 62mm (2") over 17 days
10 days
of pure sunshine
17 days
of showers or rain

What to pack: If you’re heading to Boise in July, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.


Boise in August

  • Average temperature: 26℃ (79℉)
  • Average high temperature: 33℃ (91℉)
  • Average low temperature: 21℃ (70℉)
  • Average humidity: 72%
  • Average sunny days: 9 days
  • Average rainfall: 63mm (2") over 18 days
9 days
of pure sunshine
18 days
of showers or rain

What to pack: If you’re heading to Boise in August, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.


Boise in September

  • Average temperature: 26℃ (78℉)
  • Average high temperature: 32℃ (89℉)
  • Average low temperature: 21℃ (69℉)
  • Average humidity: 75%
  • Average sunny days: 6 days
  • Average rainfall: 95mm (4") over 21 days
6 days
of pure sunshine
21 days
of showers or rain

What to pack: If you’re heading to Boise in September, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.

Boise in October

  • Average temperature: 25℃ (77℉)
  • Average high temperature: 31℃ (87℉)
  • Average low temperature: 20℃ (68℉)
  • Average humidity: 78%
  • Average sunny days: 7 days
  • Average rainfall: 71mm (3") over 21 days
7 days
of pure sunshine
21 days
of showers or rain

What to pack: If you’re heading to Boise in October, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.


Boise in November

  • Average temperature: 24℃ (74℉)
  • Average high temperature: 29℃ (84℉)
  • Average low temperature: 19℃ (66℉)
  • Average humidity: 80%
  • Average sunny days: 13 days
  • Average rainfall: 41mm (2") over 15 days
13 days
of pure sunshine
15 days
of showers or rain

What to pack: If you’re heading to Boise in November, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Boise in December

  • Average temperature: 23℃ (72℉)
  • Average high temperature: 29℃ (83℉)
  • Average low temperature: 18℃ (64℉)
  • Average humidity: 78%
  • Average sunny days: 21 days
  • Average rainfall: 11mm (0") over 8 days
21 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Boise in December, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Top FAQs

The hottest month of the year in Boise is usually July, where temperatures tend to rise to around 33℃ (91℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Boise is generally around January. The dry season often coincides with cooler weather, so you should check the temperatures in January first to make sure it’s still a good time to go.
The rainiest time of year in Boise is generally around May, although the wetter season can sometimes extend a few months either side of May too.
If you want to get the most out of your time visiting Boise, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

Boise map