Weather forecast accuracy details for Vallejo, California

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 News   70.97% 67.74% 100.00% 100.00% 84.68%
Foreca/Vaisala   66.67% 68.82% 100.00% 100.00% 83.87%
AccuWeather   53.26% 80.65% 100.00% 100.00% 83.48%
Weather Underground   61.29% 63.44% 100.00% 100.00% 81.18%
The Weather Channel   60.22% 63.44% 100.00% 100.00% 80.91%
Dark Sky   58.70% 40.22% 100.00% 100.00% 74.73%
AerisWeather   41.94% 44.09% 100.00% 100.00% 71.51%
NWS Digital Forecast   44.09% 36.56% 100.00% 100.00% 70.16%
Weatherbit   55.91% 24.73% 100.00% 100.00% 70.16%
Persistence   40.00% 44.93% 95.71% 95.71% 69.09%
OpenWeather   44.09% 20.43% 100.00% 100.00% 66.13%
Wetter   49.46% 12.90% 100.00% 100.00% 65.59%
World Weather Online   15.05% 46.24% 95.70% 95.70% 63.17%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   73.70% 72.41% 95.11% 95.11% 84.08%
Weather Underground   73.43% 73.52% 93.17% 93.17% 83.32%
Foreca/Vaisala   68.15% 72.41% 95.39% 94.28% 82.56%
AccuWeather   72.38% 74.11% 90.21% 91.88% 82.14%
AerisWeather   61.93% 62.49% 93.80% 93.80% 78.00%
NWS Digital Forecast   62.97% 61.01% 91.07% 91.07% 76.53%
Dark Sky   63.24% 53.43% 93.91% 93.91% 76.12%
Weather News   66.36% 66.39% 83.64% 83.64% 75.01%
Weatherbit   62.10% 50.19% 91.83% 91.83% 73.99%
OpenWeather   53.61% 47.13% 94.55% 94.55% 72.46%
World Weather Online   42.53% 45.59% 93.80% 93.80% 68.93%
Wetter   54.35% 25.65% 90.58% 90.58% 65.29%
Persistence   44.87% 44.54% 74.67% 74.67% 59.69%

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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