Weather forecast accuracy details for Phoenix, Arizona

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 (October)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   95.70% 88.17% 96.77% 96.77% 94.35%
Wetter   94.62% 94.62% 90.32% 92.47% 93.01%
Weather Underground   94.62% 89.25% 93.55% 93.55% 92.74%
AerisWeather   94.62% 86.02% 92.47% 92.47% 91.40%
Dark Sky   94.57% 71.74% 96.74% 96.74% 89.95%
Foreca/Vaisala   84.95% 86.02% 93.55% 93.55% 89.52%
Weather News   86.02% 84.95% 91.40% 91.40% 88.44%
AccuWeather   93.48% 84.95% 89.13% 85.87% 88.36%
NWS Digital Forecast   93.55% 83.87% 79.57% 79.57% 84.14%
Weatherbit   89.25% 22.58% 94.62% 94.62% 75.27%
Persistence   55.71% 44.93% 82.86% 82.86% 66.59%
OpenWeather   82.80% 18.28% 80.65% 80.65% 65.59%
World Weather Online   35.56% 57.78% 83.33% 83.33% 65.00%

Weather Forecast Accuracy Data Last Year (2021)

Provider High Temp Low Temp Icon Precip Text Precip Overall
AccuWeather   91.64% 86.30% 95.45% 92.39% 91.45%
Weather Underground   90.53% 82.08% 92.01% 92.01% 89.16%
The Weather Channel   90.53% 80.69% 92.66% 92.66% 89.14%
AerisWeather   86.94% 77.61% 91.42% 91.42% 86.85%
Foreca/Vaisala   84.77% 77.90% 90.32% 90.99% 86.00%
Wetter   84.96% 72.42% 92.20% 92.11% 85.42%
NWS Digital Forecast   88.15% 75.09% 87.03% 87.03% 84.33%
Dark Sky   85.14% 67.69% 92.20% 92.20% 84.31%
Weather News   79.29% 77.25% 88.86% 88.86% 83.57%
Weatherbit   77.97% 42.62% 90.71% 90.71% 75.50%
OpenWeather   77.25% 30.83% 88.21% 88.21% 71.12%
World Weather Online   63.78% 24.95% 90.04% 90.04% 67.20%
Persistence   45.08% 42.14% 82.29% 82.29% 62.95%

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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