Of course it’s not Texas or Arizona, but southwest Idaho can boast of some hot summer days. Sheltered by mountains and adjoining the desert, the Boise Valley averages about 5 degrees warmer than other spots in America at the same latitude. But there is hope for those folks for whom summer is an unwelcome guest.
August is hot in this valley from start to finish, concealing the Earth’s unending flight through its seasons. Climate records tell the story of gradual changes that turn summer into autumn. Boise’s average high temperature reaches its peak from July 24 to August 3. The remainder of August brings a drop in the average temperature that totals ten degrees by the second week in September. Then through the third week of October, temperatures occupy a pleasant range of 70s to mid 60s.

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