Weather forecast accuracy details for Fullerton, 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.

Click on the headers to sort by that column.

Weather Forecast Accuracy Data Last Month (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
AccuWeather   84.95% 89.25% 77.42% 81.72% 83.33%
The Weather Channel   89.25% 84.95% 76.34% 76.34% 81.72%
Weather Underground   88.17% 83.87% 76.34% 76.34% 81.18%
Foreca/Vaisala   78.49% 81.72% 80.65% 80.65% 80.38%
NWS Digital Forecast   70.97% 73.12% 81.72% 81.72% 76.88%
Weather News   73.12% 69.89% 78.49% 78.49% 75.00%
Dark Sky   70.97% 66.67% 79.57% 79.57% 74.19%
World Weather Online   73.12% 51.61% 77.42% 77.42% 69.89%
AerisWeather   60.22% 56.99% 76.34% 76.34% 67.47%
Persistence   43.06% 53.95% 72.22% 72.22% 60.36%
Weatherbit   42.39% 25.81% 73.91% 73.91% 54.01%
OpenWeather   36.56% 21.51% 78.49% 78.49% 53.76%
Wetter   41.94% 25.81% 70.97% 70.97% 52.42%

Weather Forecast Accuracy Data Last Year (2022)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Weather Underground   81.19% 86.76% 94.06% 94.06% 89.02%
The Weather Channel   81.74% 86.39% 93.88% 93.88% 88.97%
AccuWeather   82.96% 86.67% 91.56% 93.98% 88.79%
Foreca/Vaisala   74.52% 85.84% 94.61% 94.61% 87.40%
NWS Digital Forecast   71.11% 75.16% 93.28% 93.28% 83.21%
AerisWeather   69.41% 73.42% 94.25% 94.25% 82.83%
Weather News   65.29% 77.01% 93.68% 93.68% 82.42%
Dark Sky   52.01% 69.65% 94.52% 94.52% 77.67%
World Weather Online   62.18% 44.69% 93.86% 93.86% 73.65%
Weatherbit   59.03% 44.06% 93.58% 93.58% 72.56%
Persistence   45.31% 62.31% 88.49% 88.49% 71.15%
OpenWeather   62.10% 29.32% 93.88% 93.88% 69.79%
Wetter   63.56% 19.45% 93.88% 93.88% 67.69%

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.

Please contact us with whatever custom needs you may have. We would love to help!