Boise climate

Typical historical weather for Boise, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Boise.

Annual average

12.6°C

across all months

Warmest month

34.7°C

Jul average high

Coolest month

-2.4°C

Jan average low

Annual rainfall

354mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

42.2°C

10 August 2018

Coldest day

-21.9°C

7 January 2017

Wettest day

27.5mm

12 June 2017

Windiest day

8.1m/s

5 May 2025