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 3.7° 6.3°
Average change in low temperature day-to-day 5.6° 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 27% 24%

Weather forecast accuracy for Marshalltown, Iowa

Last Month
MeteoGroup   76.61%
Foreca   75.00%
The Weather Channel   74.19%
Weather Underground   73.66%
AccuWeather   68.82%
NWS Digital Forecast   65.28%
Dark Sky (forecast.io)   64.78%
World Weather Online   57.53%
Persistence   54.84%
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

12.2% of NWS Digital Forecast's high temperature forecasts for Marshalltown were exactly right last month.