Grinnell climate

Typical historical weather for Grinnell, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Grinnell.

Annual average

10.6°C

across all months

Warmest month

28.7°C

Jul average high

Coolest month

-9.5°C

Jan average low

Annual rainfall

983mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

36.8°C

23 August 2023

Coldest day

-32°C

31 January 2019

Wettest day

67.2mm

11 July 2025

Windiest day

12.1m/s

13 January 2024