Weather forecast accuracy details for San Diego, 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 (February)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   94.25% 77.01% 97.70% 97.70% 91.67%
The Weather Channel   91.95% 79.31% 93.10% 93.10% 89.37%
AccuWeather   95.77% 78.57% 92.96% 90.14% 89.36%
Weatherbit   86.90% 76.19% 95.24% 95.24% 88.39%
Foreca/Vaisala   88.51% 75.86% 91.95% 91.95% 87.07%
NWS Digital Forecast   77.01% 78.16% 87.36% 87.36% 82.47%
AerisWeather   85.06% 59.77% 85.06% 85.06% 78.74%
Pirate Weather   78.16% 36.78% 95.40% 95.40% 76.44%
Open-Meteo   77.01% 48.28% 87.36% 87.36% 75.00%
World Weather Online   79.31% 42.53% 83.91% 83.91% 72.41%
OpenWeather   75.86% 35.63% 88.51% 88.51% 72.13%
Wetter   66.67% 48.28% 85.06% 85.06% 71.26%
Persistence   53.97% 48.44% 65.08% 65.08% 58.14%

Weather Forecast Accuracy Data Last Year (2023)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   85.51% 85.33% 94.11% 94.11% 89.77%
The Weather Channel   86.28% 84.71% 93.55% 93.55% 89.53%
Foreca/Vaisala   83.24% 84.62% 94.66% 94.66% 89.30%
AccuWeather   83.37% 80.32% 92.07% 92.73% 87.12%
AerisWeather   80.02% 77.62% 91.07% 91.07% 84.94%
NWS Digital Forecast   79.07% 76.19% 90.60% 90.60% 84.11%
Weatherbit   79.27% 72.27% 90.29% 90.29% 83.03%
World Weather Online   49.61% 52.50% 92.39% 92.39% 71.72%
Pirate Weather   65.10% 36.47% 91.14% 91.14% 70.96%
Wetter   62.15% 40.06% 89.23% 88.49% 69.98%
OpenWeather   65.19% 28.27% 92.08% 92.08% 69.41%
Persistence   53.58% 58.72% 74.69% 74.69% 65.42%

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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