Hillsboro, IA has a humid continental climate, with hot and humid summers, cold winters, and moderate precipitation throughout the year. The average annual temperature is around 48°F (9°C). During the summer months, temperatures can reach into the mid- to upper-90s (30–35°C), while in winter they may dip down to around 10°F (-12°C). Rainfall averages around 37 inches (94 cm) annually. The area also experiences some snowfall on average each year. Winters are generally milder than those of most other locations in Iowa due to Hillsboro's proximity to Lake Michigan, resulting in warmer air temperatures.
Hillsboro, Iowa gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Hillsboro averages 25 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 203 sunny days per year in Hillsboro. The US average is 205 sunny days.
Hillsboro gets some kind of precipitation, on average, 95 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 87 degrees
Winter Low: the January low is 15
Rain: averages 39 inches of rain a year
Snow: averages 25 inches of snow a year