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 4.8° 6.3°
Average change in low temperature day-to-day 4.3° 8.5°
Precipitation Last Month Last Year
Chance of dry day after a precip day 36% 61%
Chance of precip day after a dry day 31% 21%

Weather forecast accuracy for Marshalltown, Iowa

Last Month
Weather Underground   68.33%
WeatherBug   68.06%
National Weather Service   67.50%
The Weather Channel   65.28%
MeteoGroup   65.28%
AccuWeather   63.61%
Dark Sky (forecast.io)   63.06%
Foreca   61.49%
CustomWeather   58.33%
Persistence   47.50%
Last Year
MeteoGroup   75.51%
The Weather Channel   74.73%
WeatherBug   73.32%
National Weather Service   73.12%
AccuWeather   70.42%
Foreca   70.30%
Weather Underground   68.48%
CustomWeather   68.35%
Persistence   44.94%

ForecastAdvisor Fact

It rained or snowed 30% of the time in Marshalltown last year when Persistence's text forecasts called for precipitation, and 24% of the time when they did not.