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 5.6° 6.6°
Average change in low temperature day-to-day 6.0° 8.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 56% 61%
Chance of precip day after a dry day 28% 20%

Weather forecast accuracy for Marshalltown, Iowa

Last Month
Foreca   76.79%
Weather Underground   76.27%
The Weather Channel   75.89%
MeteoGroup   75.30%
AccuWeather   74.40%
Dark Sky (forecast.io)   73.21%
NWS Digital Forecast   71.43%
World Weather Online   68.15%
Persistence   47.84%
Last Year
Weather Underground   76.90%
The Weather Channel   76.82%
MeteoGroup   76.19%
Foreca   76.12%
AccuWeather   75.18%
NWS Digital Forecast   70.27%
Dark Sky (forecast.io)   68.01%
World Weather Online   63.99%
Persistence   45.91%

ForecastAdvisor Fact

On average, Dark Sky (forecast.io)'s low temperature forecasts for Marshalltown were off by 3.48 degrees last year.