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
MeteoGroup   71.11% 86.67% 84.44% 84.44% 81.67%
The Weather Channel   77.78% 66.67% 84.44% 84.44% 78.33%
Weather Underground   76.40% 67.42% 84.27% 84.27% 78.09%
Foreca   64.04% 79.55% 83.15% 83.15% 77.47%
Dark Sky (forecast.io)   51.11% 71.11% 87.78% 87.78% 74.44%
National Weather Service   43.33% 83.33% 84.44% 83.33% 73.61%
CustomWeather   53.33% 75.56% 77.78% 77.78% 71.11%
WeatherBug   34.44% 74.44% 81.11% 81.11% 67.78%
AccuWeather   18.89% 75.56% 83.33% 84.44% 65.56%
Persistence   45.56% 26.67% 66.67% 66.67% 51.39%
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%
 
If this data feeds your inner weather geek, you'll probably be interested in the amazing amount of weather data available from ForecastWatch. Likewise, if you're looking to assess your own forecasting accuracy or would like to make more informed decisions about a weather provider you're considering or already use, we can provide data to help you.

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.

Please contact us with whatever custome needs you may have. We would love to help!