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Marshalltown climate
Typical historical weather for Marshalltown, 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 Marshalltown.
Annual average
10.3°C
across all months
Warmest month
28.5°C
Jul average high
Coolest month
-10°C
Jan average low
Annual rainfall
944mm
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
37.5°C
23 August 2023
Coldest day
-32.7°C
31 January 2019
Wettest day
74.1mm
11 July 2025
Windiest day
13.8m/s
24 February 2019
See the detail: Marshalltown on 11 July 2025.