Our verdict
The best time to visit Boise is September-November
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.
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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:
| Season | Months |
|---|---|
| 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:
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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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
of pure sunshine
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.
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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
of pure sunshine
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.
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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
of pure sunshine
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.
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