Weather forecast accuracy details for Sioux City, Iowa

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 (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Foreca/Vaisala   77.78% 53.33% 96.77% 96.77% 81.16%
The Weather Channel   74.44% 51.11% 98.92% 98.92% 80.85%
Weather Underground   72.22% 52.22% 98.92% 98.92% 80.57%
AccuWeather   71.59% 57.95% 95.56% 95.56% 80.16%
AerisWeather   54.02% 63.22% 94.44% 94.44% 76.53%
Dark Sky   58.89% 46.67% 98.92% 98.92% 75.85%
NWS Digital Forecast   64.44% 58.89% 87.10% 87.10% 74.38%
Weather News   45.56% 56.67% 93.55% 93.55% 72.33%
Wetter   58.89% 28.89% 95.70% 95.70% 69.79%
OpenWeather   60.00% 28.89% 88.17% 88.17% 66.31%
Weatherbit   50.00% 37.93% 86.52% 86.52% 65.24%
World Weather Online   47.78% 40.00% 83.87% 83.87% 63.88%
Persistence   21.54% 32.84% 83.58% 83.58% 55.38%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   74.34% 63.30% 89.08% 89.08% 78.95%
Weather Underground   74.53% 63.30% 88.70% 88.70% 78.81%
AccuWeather   75.21% 61.86% 85.52% 86.21% 77.20%
Foreca/Vaisala   71.07% 58.90% 88.53% 89.08% 76.89%
AerisWeather   69.86% 60.47% 86.89% 86.89% 76.03%
Dark Sky   67.23% 54.78% 86.46% 86.46% 73.73%
NWS Digital Forecast   70.54% 61.00% 76.34% 76.34% 71.06%
Weatherbit   55.56% 44.13% 82.71% 82.71% 66.28%
Weather News   59.38% 47.85% 78.67% 78.67% 66.14%
Wetter   49.25% 39.70% 83.75% 83.75% 64.11%
OpenWeather   50.75% 36.33% 78.90% 78.90% 61.22%
World Weather Online   44.29% 41.95% 76.66% 76.66% 59.89%
Persistence   30.26% 27.02% 66.67% 66.67% 47.65%

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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 overview.

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