Weather Forecast and Radar for Grinnell, Iowa

Weather in Grinnell, IA

Grinnell, Iowa, United States has a continental climate with four distinct seasons. Summers are warm and humid while winters are cold and dry.

Spring in Grinnell starts in March and temperatures average between 40-60F (4-15C). Rainfall is frequent, but thunderstorms are rare.

In the summer, temperatures can reach up to 90F (32C) during the day. Nights are usually cooler, with temperatures in the mid-60s (18C). Rainfall is common, but thunderstorms are frequent.

Fall in Grinnell begins in September and temperatures average between 40-60F (4-15C). Rainfall is frequent, but thunderstorms are rare.

Winter in Grinnell is cold and dry, with temperatures typically ranging from 20-30F (-6 to -1C). Snowfall is common, and blizzards can occur.

Fast Facts About Grinnell, IA

As of 2020, the city population is 9069.

Major Cities Nearby Grinnell, IA

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Grinnell, Iowa.