Weather forecast accuracy details for Walla Walla, Washington

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 (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   65.59% 65.59% 79.57% 79.57% 72.58%
AccuWeather   70.00% 71.11% 72.22% 72.22% 71.39%
Weather Underground   66.67% 65.59% 69.89% 69.89% 68.01%
Foreca/Vaisala   64.52% 64.52% 70.97% 70.97% 67.74%
AerisWeather   60.00% 58.89% 75.56% 75.56% 67.50%
World Weather Online   65.59% 44.09% 70.97% 70.97% 62.90%
Dark Sky   52.69% 60.22% 63.44% 63.44% 59.95%
Wetter   64.52% 46.24% 64.52% 64.52% 59.95%
NWS Digital Forecast   59.14% 59.14% 60.22% 60.22% 59.68%
Weatherbit   54.95% 42.39% 68.13% 68.13% 58.40%
OpenWeather   59.14% 46.24% 62.37% 62.37% 57.53%
Weather News   53.76% 41.94% 41.94% 41.94% 44.89%
Persistence   20.97% 31.82% 62.90% 62.90% 44.65%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   74.44% 82.04% 86.20% 86.20% 82.22%
Weather Underground   74.26% 81.94% 84.35% 84.35% 81.23%
Foreca/Vaisala   71.39% 75.19% 86.07% 83.06% 78.92%
AccuWeather   76.50% 80.22% 72.69% 81.65% 77.77%
AerisWeather   66.67% 68.81% 82.87% 82.87% 75.30%
Dark Sky   66.76% 67.96% 83.24% 83.24% 75.30%
NWS Digital Forecast   68.72% 71.88% 80.24% 80.24% 75.27%
World Weather Online   57.82% 59.03% 81.10% 81.10% 69.76%
Weatherbit   62.06% 51.07% 80.06% 80.06% 68.31%
OpenWeather   61.11% 49.72% 80.19% 80.19% 67.80%
Weather News   55.38% 62.69% 72.36% 72.36% 65.69%
Wetter   61.39% 28.15% 79.44% 79.44% 62.11%
Persistence   30.76% 34.68% 66.63% 66.63% 49.68%

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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