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.

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Weather Forecast Accuracy Data Last Month (February)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   76.19% 69.05% 86.90% 85.71% 79.46%
Weatherbit   74.71% 65.52% 88.51% 88.51% 79.31%
Foreca/Vaisala   74.71% 71.26% 81.61% 81.61% 77.30%
AccuWeather   72.60% 63.01% 86.30% 84.93% 76.71%
The Weather Channel   71.26% 68.97% 82.76% 82.76% 76.44%
AerisWeather   59.77% 70.11% 79.31% 79.31% 72.13%
NWS Digital Forecast   67.82% 64.37% 72.41% 72.41% 69.25%
Pirate Weather   68.97% 13.79% 90.80% 90.80% 66.09%
Wetter   48.28% 39.08% 85.06% 87.36% 64.94%
Open-Meteo   62.07% 43.68% 72.41% 72.41% 62.64%
OpenWeather   63.22% 20.69% 78.16% 78.16% 60.06%
World Weather Online   63.22% 33.33% 71.26% 71.26% 59.77%
Persistence   14.75% 20.97% 77.05% 77.05% 47.46%

Weather Forecast Accuracy Data Last Year (2023)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   81.82% 76.40% 84.43% 84.43% 81.77%
Microsoft   77.52% 75.52% 86.70% 86.70% 81.61%
Foreca/Vaisala   75.57% 75.02% 84.98% 84.98% 80.14%
AccuWeather   75.41% 77.05% 81.84% 81.18% 78.87%
AerisWeather   77.50% 72.91% 82.14% 82.14% 78.67%
Weatherbit   74.39% 69.73% 80.71% 80.71% 76.39%
NWS Digital Forecast   76.81% 68.55% 77.34% 77.34% 75.01%
Wetter   61.25% 59.87% 78.30% 77.56% 69.25%
Pirate Weather   62.33% 38.87% 83.24% 83.24% 66.92%
World Weather Online   51.30% 55.33% 76.34% 76.34% 64.83%
OpenWeather   54.91% 42.06% 77.29% 77.29% 62.89%
Persistence   30.73% 27.37% 57.90% 57.90% 43.48%

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 overview.

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