5-day weather forecast for Sully, Iowa

Weather changeability for Marshalltown, Iowa

Temperature Last Month Last Year
Average change in high temperature day-to-day 3.8° 6.3°
Average change in low temperature day-to-day 4.9° 7.7°
Precipitation Last Month Last Year
Chance of dry day after a precip day 67% 59%
Chance of precip day after a dry day 13% 24%

Weather forecast accuracy for Marshalltown, Iowa

Last Month
MeteoGroup   75.56%
AccuWeather   75.28%
Weather Underground   75.28%
The Weather Channel   75.00%
Foreca   73.33%
World Weather Online   63.89%
Dark Sky (forecast.io)   63.89%
NWS Digital Forecast   63.61%
Persistence   53.45%
Last Year
Weather Underground   75.34%
The Weather Channel   75.22%
Foreca   73.60%
AccuWeather   73.49%
MeteoGroup   73.44%
Dark Sky (forecast.io)   69.74%
NWS Digital Forecast   69.37%
World Weather Online   63.61%
Persistence   44.56%

ForecastAdvisor Fact

On average, Weather Underground's high temperature forecasts for Marshalltown were off by 2.43 degrees last month.