Barnum, IA has a humid continental climate with an average of 37 inches of precipitation each year. The summers are warm and humid with temperatures reaching the mid-80s on some days while winters are cold and snowy with temperatures dropping into the single digits. Snowfall can be heavy during wintertime, averaging around 43 inches annually. Spring and fall are mild, but unpredictable weather is common during both seasons.
Barnum, Iowa gets 34 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Barnum averages 35 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 199 sunny days per year in Barnum. The US average is 205 sunny days.
Barnum gets some kind of precipitation, on average, 98 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 84 degrees
Winter Low: the January low is 8
Rain: averages 34 inches of rain a year
Snow: averages 35 inches of snow a year