5-day weather forecast for Sully, Iowa
Today
65°
83°
Thunderstorms
Monday
64°
79°
Chance Thunderstorms
Tuesday
59°
73°
Chance Thunderstorms
Wednesday
56°
67°
Chance Rain
Showers
Showers
Thursday
53°
67°
Slight Chance Rain Showers
Click on a forecast to see the forecast trend for that day
Weather changeability for Marshalltown, Iowa
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 4.7° | 6.3° |
| Average change in low temperature day-to-day | 10.5° | 8.2° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 63% | 55% |
| Chance of precip day after a dry day | 22% | 22% |
Weather forecast accuracy for Marshalltown, Iowa
| The Weather Channel | 80.83% |
| Intellicast | 80.83% |
| National Weather Service | 79.44% |
| NWS Digital Forecast | 75.83% |
| AccuWeather | 72.78% |
| Weather Underground | 70.83% |
| CustomWeather | 65.00% |
| World Weather Online | 62.78% |
| Persistence | 41.13% |
| Intellicast | 68.45% |
| The Weather Channel | 68.33% |
| National Weather Service | 66.54% |
| NWS Digital Forecast | 64.74% |
| AccuWeather | 62.77% |
| CustomWeather | 60.78% |
| Persistence | 45.13% |
ForecastAdvisor Fact
8.1% of CustomWeather's low temperature forecasts for Marshalltown were exactly right last year.