weather

BOISE EXPERIENCES ALL FOUR SEASONS

NESTLED IN THE TREASURE VALLEY AGAINST THE MAJESTIC FOOTHILLS, BOISE IS PART OF A THRIVING METROPOLITAN AREA OF OVER 660,000 PEOPLE. BOISE HAS A SEMI-ARID CLIMATE WITH FOUR DISTINCT SEASONS.

Boise experiences hot and dry summers with highs reaching 100 °F eight days in a typical year and 90 °F on 51 days. Yet because of the aridity, average diurnal temperature variation exceeds 30 °F in summer. Winters are moderately cold, with a December average of 30.7 °F, and lows falling to 0 °F or below on around three nights per year. Snowfall averages 19 inches, but typically falls in bouts of 3 inches or less. Spring and fall are mild. Autumn is brief; spring is gradual. Precipitation is usually infrequent and light, especially so during the summer months. Extremes have ranged from −28 °F on January 16, 1888 to 111 °F, as recently as July 19, 1960; temperatures have reached −25 °F and 110 °F as recently as December 22, 1990 and July 1, 2013, respectively.

 
 

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