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 (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Weather Underground   81.72% 64.52% 93.55% 93.55% 83.33%
The Weather Channel   79.57% 62.37% 94.62% 94.62% 82.80%
AccuWeather   77.42% 58.06% 91.40% 91.40% 79.57%
Foreca/Vaisala   72.04% 58.06% 87.10% 87.10% 76.08%
AerisWeather   54.84% 56.99% 89.25% 89.25% 72.58%
Dark Sky   55.91% 52.69% 89.25% 89.25% 71.77%
NWS Digital Forecast   57.78% 60.00% 83.33% 83.33% 71.11%
OpenWeather   59.14% 25.81% 95.70% 95.70% 69.09%
Weather News   58.06% 45.16% 86.02% 86.02% 68.82%
World Weather Online   56.99% 33.33% 86.02% 86.02% 65.59%
Weatherbit   42.86% 25.58% 91.67% 91.67% 62.94%
Wetter   49.46% 26.88% 83.87% 83.87% 61.02%
Persistence   41.10% 28.95% 67.12% 67.12% 51.07%

Weather Forecast Accuracy Data Last Year (2022)

Provider High Temp Low Temp Icon Precip Text Precip Overall
AccuWeather   77.44% 71.77% 94.44% 95.73% 84.85%
Foreca/Vaisala   75.46% 71.34% 96.06% 96.06% 84.73%
The Weather Channel   75.00% 68.32% 97.44% 97.44% 84.55%
Weather Underground   75.18% 68.77% 96.52% 96.52% 84.25%
Weather News   70.34% 61.80% 94.67% 94.67% 80.37%
Dark Sky   66.64% 45.92% 96.52% 96.52% 76.40%
AerisWeather   60.71% 53.66% 95.24% 95.24% 76.21%
NWS Digital Forecast   61.59% 53.55% 92.80% 92.80% 75.18%
OpenWeather   62.73% 38.46% 96.70% 96.70% 73.65%
Weatherbit   61.40% 32.38% 95.20% 95.20% 71.05%
Wetter   64.29% 22.44% 93.32% 93.32% 68.34%
World Weather Online   34.43% 39.65% 94.78% 94.78% 65.91%
Persistence   43.64% 43.20% 82.64% 82.64% 63.03%

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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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