Weather forecast accuracy details for Clemson, South Carolina

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   69.89% 80.65% 88.17% 88.17% 81.72%
The Weather Channel   73.12% 76.34% 84.95% 84.95% 79.84%
Weather Underground   73.12% 78.49% 83.87% 83.87% 79.84%
AccuWeather   65.56% 74.44% 84.44% 84.44% 77.22%
AerisWeather   63.74% 76.92% 83.52% 83.52% 76.92%
Dark Sky   63.44% 67.74% 82.80% 82.80% 74.19%
Weatherbit   53.85% 67.42% 86.81% 86.81% 73.72%
Wetter   62.37% 64.52% 83.87% 83.87% 73.66%
World Weather Online   64.52% 67.74% 80.65% 80.65% 73.39%
NWS Digital Forecast   62.37% 72.04% 75.27% 75.27% 71.24%
Weather News   58.06% 66.67% 77.42% 77.42% 69.89%
OpenWeather   62.37% 36.56% 83.87% 83.87% 66.67%
Persistence   25.00% 10.29% 73.44% 73.44% 45.54%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Weather Underground   81.38% 87.24% 86.13% 86.13% 85.22%
The Weather Channel   81.66% 86.78% 85.75% 85.75% 84.99%
AccuWeather   81.17% 85.93% 82.58% 79.10% 82.19%
Foreca/Vaisala   76.63% 83.43% 82.85% 83.43% 81.58%
Dark Sky   76.82% 79.80% 82.87% 82.87% 80.59%
AerisWeather   64.65% 83.21% 80.88% 80.88% 77.40%
Wetter   59.78% 73.37% 84.54% 84.54% 75.56%
Weatherbit   65.62% 65.33% 81.77% 81.77% 73.62%
Weather News   61.04% 74.30% 74.93% 74.93% 71.30%
NWS Digital Forecast   58.80% 82.78% 71.31% 71.31% 71.05%
World Weather Online   52.05% 73.56% 74.49% 74.49% 68.65%
OpenWeather   59.87% 52.42% 75.61% 75.61% 65.88%
Persistence   40.12% 37.38% 61.74% 61.74% 50.24%

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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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