Weather forecast accuracy details for Smithfield, Virginia

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 (September)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   96.55% 62.07% 94.44% 94.44% 86.88%
Weather Underground   96.55% 62.07% 94.44% 94.44% 86.88%
AccuWeather   97.70% 63.22% 92.22% 91.11% 86.06%
Foreca/Vaisala   91.95% 57.47% 91.11% 91.11% 82.91%
AerisWeather   72.41% 57.47% 93.33% 93.33% 79.14%
NWS Digital Forecast   75.86% 57.47% 87.78% 87.78% 77.22%
OpenWeather   89.66% 49.43% 84.44% 84.44% 76.99%
Wetter   80.46% 36.78% 87.78% 87.78% 73.20%
World Weather Online   35.63% 42.53% 81.11% 81.11% 60.10%
Persistence   48.53% 30.99% 61.76% 61.76% 50.76%
Weather News   74.71% 41.38% 76.67% 0.00% 48.19%

Weather Forecast Accuracy Data Last Year (2020)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   83.01% 75.35% 85.06% 85.06% 82.12%
Weather Underground   83.01% 75.35% 82.63% 82.63% 80.91%
Foreca/Vaisala   81.61% 74.32% 82.17% 82.17% 80.07%
AccuWeather   79.55% 74.70% 78.62% 79.65% 78.13%
AerisWeather   74.32% 65.64% 78.52% 78.52% 74.25%
NWS Digital Forecast   72.61% 65.90% 76.15% 76.15% 72.70%
Wetter   59.91% 47.98% 78.22% 78.22% 66.08%
OpenWeather   48.27% 46.87% 76.66% 76.66% 62.11%
World Weather Online   46.91% 52.15% 72.57% 72.57% 61.05%
Weather News   55.43% 57.10% 61.78% 0.00% 43.58%
Persistence   28.95% 32.37% 47.10% 47.10% 38.88%

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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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