Irwin, ID has a humid continental climate, with hot summers and cold winters. The area is known for its large temperature swings throughout the year. Summer months are often hot and humid, with daytime temperatures hovering in the mid-80s and nighttime temperatures dropping into the low 50s. Winters are just as extreme, with temperatures that can dip well below freezing during the coldest months of December and January. Precipitation is plentiful year-round, so Irwin has plenty of opportunities for activities like skiing and snowshoeing in wintertime.
Irwin, Idaho gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Irwin averages 72 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 205 sunny days per year in Irwin. The US average is 205 sunny days.
Irwin gets some kind of precipitation, on average, 106 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 83 degrees
Winter Low: the January low is 13
Rain: averages 18 inches of rain a year
Snow: averages 72 inches of snow a year