Weather forecast accuracy details for Indianapolis, Indiana

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 (October)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Weather Underground   90.32% 80.65% 87.10% 87.10% 86.29%
The Weather Channel   88.17% 80.65% 87.10% 87.10% 85.75%
Foreca/Vaisala   87.10% 75.27% 89.25% 89.25% 85.22%
AerisWeather   86.02% 76.34% 87.10% 87.10% 84.14%
AccuWeather   85.87% 73.12% 86.96% 86.96% 83.23%
Wetter   81.72% 74.19% 86.02% 83.87% 81.45%
Dark Sky   77.42% 68.82% 89.25% 89.25% 81.18%
NWS Digital Forecast   84.95% 79.57% 79.57% 79.57% 80.91%
Weather News   80.65% 58.06% 86.02% 86.02% 77.69%
OpenWeather   79.57% 44.09% 87.10% 87.10% 74.46%
Weatherbit   77.42% 26.88% 88.17% 88.17% 70.16%
World Weather Online   46.24% 58.06% 81.72% 81.72% 66.94%
Persistence   27.54% 24.64% 57.97% 57.97% 42.03%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   80.69% 85.52% 85.52% 85.52% 84.31%
Weather Underground   81.80% 84.68% 82.54% 82.54% 82.89%
Foreca/Vaisala   76.88% 83.19% 85.16% 85.33% 82.64%
AccuWeather   81.03% 84.36% 80.19% 79.15% 81.18%
AerisWeather   76.26% 80.54% 82.68% 82.68% 80.54%
Dark Sky   71.68% 80.04% 83.75% 83.75% 79.81%
NWS Digital Forecast   77.10% 82.15% 77.38% 77.38% 78.50%
Wetter   70.10% 70.66% 77.72% 77.44% 73.98%
World Weather Online   60.89% 56.70% 76.16% 76.16% 67.48%
Weatherbit   61.41% 57.68% 74.98% 74.98% 67.26%
OpenWeather   65.09% 42.71% 79.94% 79.94% 66.92%
Weather News   69.33% 67.32% 61.34% 61.34% 64.83%
Persistence   33.21% 33.09% 53.84% 53.84% 43.49%

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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