Weather forecast accuracy details for Nemaha, 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
Microsoft   78.65% 57.30% 87.78% 87.78% 77.88%
The Weather Channel   82.22% 60.00% 83.33% 83.33% 77.22%
AerisWeather   73.33% 53.33% 81.11% 81.11% 72.22%
Weatherbit   58.89% 57.78% 85.56% 85.56% 71.94%
Foreca   71.11% 53.33% 81.11% 81.11% 71.67%
NWS Digital Forecast   63.64% 46.59% 80.68% 80.68% 67.90%
Open-Meteo   51.11% 36.67% 78.89% 78.89% 61.39%
Pirate Weather   57.78% 15.56% 84.44% 84.44% 60.56%
OpenWeather   48.89% 26.67% 76.67% 76.67% 57.22%
World Weather Online   38.89% 30.00% 72.22% 72.22% 53.33%
Wetter.com   24.44% 28.89% 71.11% 73.33% 49.44%
Persistence   17.78% 16.67% 62.22% 62.22% 39.72%

Weather Forecast Accuracy Data Last Year (2025)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   74.88% 66.86% 84.10% 84.10% 77.49%
Microsoft   73.87% 67.98% 83.38% 83.38% 77.15%
Weatherbit   70.03% 61.01% 83.96% 83.96% 74.74%
AerisWeather   72.16% 64.26% 79.35% 79.44% 73.80%
Foreca   71.68% 63.58% 79.54% 79.54% 73.58%
NWS Digital Forecast   64.49% 60.39% 75.78% 75.78% 69.11%
Pirate Weather   66.76% 31.11% 86.32% 79.29% 65.87%
Open-Meteo   58.38% 45.86% 74.54% 74.54% 63.33%
World Weather Online   49.28% 45.12% 76.49% 76.49% 61.85%
OpenWeather   55.11% 31.70% 74.54% 74.54% 58.97%
Wetter.com   44.70% 41.14% 76.08% 73.49% 58.85%
Persistence   27.18% 21.79% 64.67% 64.67% 44.58%

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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