Onawa Climate Graph - Iowa Climate Chart
Climate summaryWhat is the average weather in Onawa, Iowa?
Onawa experiences a humid continental climate, marked by very large seasonal temperature contrasts due to its inland location. Summers are hot, while winters are cold. The area receives moderate precipitation annually, with a strong pattern of wetter summers and drier winters.
Based on climate normals · 1991–2020 Onawa weather averages