5-day weather forecast for Lyons, Illinois

Weather forecast accuracy details for Chicago, Illinois

These are the one- to three-day out accuracy percentages for high temperature, low temperature, icon forecast precipitation (both rain and snow), and text forecast precipitation (both rain and snow). Temperature accuracy is the percentage of forecasts within three degrees. Precipitation accuracy is the percentage of correct forecasts. The forecasts are collected in the evening.

Click on the headers to sort by that column.
Weather Forecast Accuracy Data Last Month
Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   67.95% 72.15% 91.03% 91.03% 80.54%
MeteoGroup   66.67% 73.81% 90.48% 90.48% 80.36%
Weather Underground   63.10% 65.48% 89.29% 89.29% 76.79%
Foreca   61.90% 64.29% 80.95% 80.95% 72.02%
WeatherBug   57.14% 50.00% 83.33% 83.33% 68.45%
CustomWeather   63.10% 55.95% 73.81% 73.81% 66.67%
AccuWeather   52.38% 61.90% 77.38% 75.00% 66.67%
National Weather Service   61.90% 64.29% 69.05% 64.29% 64.88%
Dark Sky (forecast.io)   47.62% 52.38% 64.29% 64.29% 57.14%
Persistence   21.79% 21.79% 78.21% 78.21% 50.00%
Weather Forecast Accuracy Data Last Year
Provider High Temp Low Temp Icon Precip Text Precip Overall
MeteoGroup   64.91% 74.66% 80.12% 80.12% 74.95%
The Weather Channel   69.48% 72.11% 78.81% 78.81% 74.81%
National Weather Service   62.17% 68.87% 77.83% 75.96% 71.21%
Foreca   58.78% 64.77% 80.47% 80.47% 71.12%
Weather Underground   61.81% 63.95% 79.59% 75.22% 70.14%
AccuWeather   60.74% 66.86% 75.22% 75.80% 69.66%
CustomWeather   61.13% 62.88% 75.80% 75.61% 68.85%
WeatherBug   48.18% 59.39% 79.84% 79.84% 66.81%
Persistence   26.86% 25.51% 59.10% 59.10% 42.64%
 
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The data here is calculated from forecasts and observations collected and analyzed by ForecastWatch. If you would like more information about the methods, scientific approach, and the quality controls employed to ensure the data and analyses are of the highest quality, please read this white paper.

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