5-day weather forecast for Castaic, California

Weather forecast accuracy details for Van Nuys, 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
Provider High Temp Low Temp Icon Precip Text Precip Overall
MeteoGroup   84.44% 92.22% 95.56% 95.56% 91.94%
AccuWeather   84.44% 83.33% 95.56% 92.22% 88.89%
Weather Underground   87.78% 77.78% 94.44% 94.44% 88.61%
The Weather Channel   86.67% 75.56% 94.44% 94.44% 87.78%
NWS Digital Forecast   67.78% 78.89% 92.22% 92.22% 82.78%
Foreca   61.11% 73.33% 94.44% 94.44% 80.83%
Dark Sky (forecast.io)   33.33% 62.22% 97.78% 97.78% 72.78%
Persistence   37.78% 52.22% 86.67% 86.67% 65.83%
Weather Forecast Accuracy Data Last Year
Provider High Temp Low Temp Icon Precip Text Precip Overall
MeteoGroup   77.26% 78.50% 96.16% 96.16% 87.02%
The Weather Channel   81.30% 75.76% 95.51% 95.51% 87.02%
Weather Underground   81.77% 74.38% 95.73% 95.73% 86.90%
AccuWeather   71.95% 76.50% 95.55% 94.72% 84.68%
NWS Digital Forecast   70.90% 67.54% 96.11% 96.11% 82.67%
Foreca   71.38% 66.77% 94.55% 94.55% 81.81%
CustomWeather   70.85% 65.10% 95.61% 95.61% 81.79%
WeatherBug   55.10% 61.25% 93.63% 93.63% 75.90%
Persistence   39.31% 55.10% 90.93% 90.93% 69.07%
 
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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 white paper.

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