5-day weather forecast for Union, Iowa

Weather changeability for Marshalltown, Iowa

Temperature Last Month Last Year
Average change in high temperature day-to-day 9.1° 6.6°
Average change in low temperature day-to-day 11.8° 8.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 64% 61%
Chance of precip day after a dry day 44% 20%

Weather forecast accuracy for Marshalltown, Iowa

Last Month
Weather Underground   69.72%
The Weather Channel   69.44%
Foreca   68.97%
MeteoGroup   68.61%
AccuWeather   66.94%
NWS Digital Forecast   64.08%
Dark Sky (forecast.io)   62.78%
World Weather Online   59.41%
Persistence   29.02%
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

6.7% of Weather Underground's low temperature forecasts for Marshalltown were off by more than 10 degrees last month.