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
The Weather Channel   79.57% 86.02% 95.70% 95.70% 89.25%
Weather Underground   80.00% 85.56% 95.56% 95.56% 89.17%
CustomWeather   72.22% 84.44% 96.67% 96.67% 87.50%
AccuWeather   75.27% 84.95% 94.62% 94.62% 87.37%
National Weather Service   74.19% 82.80% 93.55% 90.32% 85.22%
MeteoGroup   65.59% 74.19% 96.77% 96.77% 83.33%
Foreca   64.37% 65.52% 94.25% 94.25% 79.60%
WeatherBug   45.98% 75.86% 94.25% 94.25% 77.59%
Dark Sky (forecast.io)   33.33% 75.27% 96.77% 96.77% 75.54%
Persistence   49.43% 60.71% 95.40% 95.40% 75.24%
Weather Forecast Accuracy Data Last Year
Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   73.20% 70.80% 96.06% 96.06% 84.03%
MeteoGroup   66.19% 70.70% 94.81% 94.72% 81.60%
Foreca   62.00% 65.80% 95.59% 95.59% 79.74%
National Weather Service   66.86% 64.07% 95.29% 92.03% 79.56%
Weather Underground   63.22% 62.16% 95.79% 95.40% 79.14%
AccuWeather   58.43% 60.73% 95.50% 94.83% 77.37%
CustomWeather   60.34% 58.43% 95.02% 95.02% 77.20%
WeatherBug   56.56% 61.00% 93.29% 93.29% 76.03%
Persistence   35.76% 52.94% 90.44% 90.44% 67.39%
 
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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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