Weather forecast accuracy details for Grand Rapids, Michigan

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
The Weather Channel   80.65% 67.74% 82.80% 82.80% 78.49%
AerisWeather   70.97% 70.97% 78.49% 82.80% 75.81%
Foreca/Vaisala   68.82% 72.04% 80.65% 80.65% 75.54%
Weather Underground   79.57% 68.82% 76.34% 76.34% 75.27%
AccuWeather   76.34% 68.82% 77.42% 75.27% 74.46%
OpenWeather   75.27% 52.69% 83.87% 83.87% 73.92%
World Weather Online   60.22% 60.22% 80.65% 80.65% 70.43%
Dark Sky   69.89% 61.29% 73.12% 73.12% 69.35%
NWS Digital Forecast   69.89% 62.37% 67.74% 67.74% 66.94%
Wetter   75.27% 46.24% 70.97% 70.97% 65.86%
Weatherbit   72.04% 45.05% 70.97% 70.97% 64.76%
Weather News   59.14% 59.14% 69.89% 69.89% 64.52%
Persistence   24.64% 34.25% 52.17% 52.17% 40.81%

Weather Forecast Accuracy Data Last Year (2022)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Foreca/Vaisala   80.27% 73.24% 83.65% 83.65% 80.21%
The Weather Channel   81.92% 76.35% 81.19% 81.19% 80.16%
AccuWeather   82.13% 76.20% 80.67% 77.22% 79.06%
Weather Underground   81.92% 76.62% 76.26% 76.26% 77.76%
AerisWeather   76.26% 72.51% 78.72% 79.36% 76.71%
NWS Digital Forecast   77.76% 74.42% 70.62% 70.62% 73.35%
Dark Sky   74.43% 60.82% 77.72% 77.72% 72.67%
World Weather Online   62.83% 54.89% 77.81% 77.81% 68.33%
OpenWeather   63.38% 46.21% 79.63% 79.63% 67.21%
Weather News   65.35% 59.07% 70.94% 70.94% 66.58%
Wetter   63.47% 56.99% 71.14% 71.14% 65.68%
Weatherbit   65.77% 35.43% 78.54% 78.54% 64.57%
Persistence   31.57% 26.75% 55.46% 55.46% 42.31%

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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