Cool
Average highs are around 18°C, so pack for cooler days.
Weather Guide
Boise, Idaho, United States Average Monthly Weather
Weather score55Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 17°C, sunshine averages 8h per day, and rainfall totals about 307mm.
Annual weather
Annual averages
Temp
17°C
Rain
307mm
Annual total
Sun
8h
Weather score
55
Mixed avg
Seasonal climate calendar
Trip feel
Drier
Rainfall averages 19mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.5h per day, enough for a balanced month.
Map
Weather map
Compare Boise, Idaho, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October18°C average high
October is close to Boise's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
October19mm average rain
October is close to Boise's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
October7.5 hours average sun
October sits close to Boise's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
October45 weather score
October scores below Boise's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
