5-day weather forecast for Stewardson, Illinois

Weather forecast accuracy details for Lerna, 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   77.78% 82.22% 81.11% 81.11% 80.56%
Weather Underground   76.67% 81.11% 78.89% 78.89% 78.89%
CustomWeather   81.11% 73.33% 78.89% 78.89% 78.06%
National Weather Service   82.22% 70.00% 78.89% 78.89% 77.50%
MeteoGroup   78.89% 80.00% 75.56% 74.44% 77.22%
AccuWeather   77.78% 76.67% 73.33% 74.44% 75.56%
Foreca   72.22% 78.89% 74.44% 74.44% 75.00%
WeatherBug   77.01% 62.07% 79.31% 79.31% 74.43%
Dark Sky (forecast.io)   81.11% 61.11% 75.56% 75.56% 73.33%
Persistence   47.13% 20.69% 62.07% 62.07% 47.99%
Weather Forecast Accuracy Data Last Year
Provider High Temp Low Temp Icon Precip Text Precip Overall
MeteoGroup   69.36% 71.21% 83.81% 83.91% 77.07%
The Weather Channel   71.09% 68.03% 81.82% 81.82% 75.69%
National Weather Service   65.71% 67.76% 81.93% 80.70% 74.02%
Foreca   69.89% 63.72% 78.42% 78.42% 72.61%
WeatherBug   64.62% 62.11% 81.77% 81.77% 72.57%
Weather Underground   66.09% 61.18% 82.74% 75.89% 71.48%
AccuWeather   61.29% 60.98% 79.67% 78.96% 70.22%
CustomWeather   59.24% 59.65% 77.53% 77.12% 68.39%
Persistence   27.83% 22.65% 63.91% 63.91% 44.58%
 
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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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