Weather forecast accuracy details for Granville, Massachusetts

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
Microsoft   94.19% 75.86% 91.40% 91.40% 88.21%
The Weather Channel   90.00% 71.11% 93.55% 93.55% 87.05%
Foreca   95.56% 70.00% 89.25% 89.25% 86.01%
AerisWeather   95.56% 65.56% 89.25% 89.25% 84.90%
Weatherbit   86.25% 67.90% 87.10% 87.10% 82.09%
OpenWeather   83.33% 44.44% 92.47% 92.47% 78.18%
NWS Digital Forecast   88.89% 57.78% 82.80% 82.80% 78.06%
Open-Meteo   74.44% 53.33% 91.40% 91.40% 77.64%
Pirate Weather   81.11% 38.89% 89.25% 87.10% 74.09%
World Weather Online   58.89% 44.44% 89.25% 89.25% 70.46%
Wetter.com   45.56% 36.67% 72.04% 75.27% 57.38%
Persistence   40.62% 15.38% 65.67% 65.67% 46.84%

Weather Forecast Accuracy Data Last Year (2024)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   80.27% 72.33% 85.98% 87.83% 81.60%
The Weather Channel   81.37% 69.29% 86.24% 86.24% 80.78%
AerisWeather   75.37% 67.51% 85.11% 84.46% 78.11%
Foreca   75.75% 68.45% 83.61% 83.61% 77.86%
Weatherbit   76.86% 61.76% 81.84% 82.31% 75.69%
NWS Digital Forecast   72.74% 65.27% 76.62% 76.62% 72.81%
Open-Meteo   61.89% 51.22% 82.02% 82.02% 69.29%
OpenWeather   63.58% 44.57% 80.52% 80.52% 67.30%
Pirate Weather   66.76% 32.68% 84.60% 84.60% 67.16%
World Weather Online   59.93% 43.16% 77.25% 77.25% 64.40%
Wetter.com   48.50% 46.91% 75.56% 75.37% 61.59%
Persistence   34.62% 30.07% 57.19% 57.19% 44.77%

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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