Weather forecast accuracy details for Palo Alto, 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 (May)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Weather Underground   92.47% 91.40% 100.00% 100.00% 95.97%
AccuWeather   91.40% 96.77% 96.77% 96.77% 95.43%
The Weather Channel   91.40% 90.32% 100.00% 100.00% 95.43%
NWS Digital Forecast   85.87% 84.78% 97.83% 97.83% 91.58%
Weather News   77.42% 82.80% 98.92% 98.92% 89.52%
Dark Sky   69.89% 87.10% 100.00% 100.00% 89.25%
OpenWeather   73.12% 63.44% 94.62% 94.62% 81.45%
AerisWeather   83.87% 51.61% 93.55% 93.55% 80.65%
Wetter   64.52% 53.76% 100.00% 100.00% 79.57%
Weatherbit   65.59% 43.01% 100.00% 100.00% 77.15%
Persistence   33.85% 53.85% 100.00% 100.00% 71.92%
World Weather Online   50.54% 36.56% 91.40% 91.40% 67.47%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   77.99% 87.74% 95.45% 95.45% 89.16%
Weather Underground   78.18% 88.02% 94.71% 94.71% 88.90%
AccuWeather   78.03% 85.79% 94.32% 92.96% 87.77%
Foreca/Vaisala   74.84% 83.75% 94.82% 94.15% 86.89%
NWS Digital Forecast   73.35% 83.47% 91.92% 91.92% 85.17%
Dark Sky   66.30% 72.05% 93.13% 93.13% 81.15%
Weather News   58.64% 77.44% 88.57% 88.57% 78.30%
AerisWeather   64.06% 62.66% 92.83% 92.83% 78.10%
Weatherbit   51.40% 55.84% 93.19% 93.19% 73.40%
OpenWeather   45.59% 51.72% 93.87% 93.87% 71.26%
World Weather Online   41.97% 54.50% 93.31% 93.31% 70.78%
Wetter   43.18% 51.35% 91.83% 91.92% 69.57%
Persistence   49.76% 56.63% 85.10% 85.10% 69.15%

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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