5-day weather forecast for Posen, Illinois
Today
43°
60°
Mostly Sunny
Saturday
46°
61°
Chance Rain
Showers
Showers
Sunday
51°
59°
Chance Rain
Showers
Showers
Monday
51°
63°
Chance Thunderstorms
Tuesday
57°
75°
Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Chicago, Illinois
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 9.7° | 5.7° |
| Average change in low temperature day-to-day | 6.0° | 6.5° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 55% | 47% |
| Chance of precip day after a dry day | 33% | 26% |
Weather forecast accuracy for Chicago, Illinois
| The Weather Channel | 76.23% |
| Intellicast | 76.23% |
| National Weather Service | 74.07% |
| AccuWeather | 68.83% |
| NWS Digital Forecast | 68.52% |
| CustomWeather | 67.59% |
| Weather Underground | 63.89% |
| World Weather Online | 57.90% |
| Persistence | 36.79% |
| Intellicast | 71.37% |
| The Weather Channel | 71.33% |
| National Weather Service | 68.01% |
| CustomWeather | 67.69% |
| NWS Digital Forecast | 67.56% |
| AccuWeather | 66.84% |
| Persistence | 43.34% |
ForecastAdvisor Fact
2.7% of Persistence's high temperature forecasts for Chicago were exactly right last month.