Weather forecast accuracy details for Modesto, 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 (December)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   44.44% 67.57% 89.33% 89.33% 72.67%
The Weather Channel   48.00% 65.33% 86.67% 86.67% 71.67%
AerisWeather   48.00% 65.33% 86.67% 86.67% 71.67%
Weatherbit   47.76% 62.69% 84.00% 84.00% 69.61%
Foreca   45.33% 61.33% 85.33% 85.33% 69.33%
NWS Digital Forecast   42.47% 58.90% 80.82% 80.82% 65.75%
Open-Meteo   32.00% 52.00% 85.33% 85.33% 63.67%
Wetter.com   45.33% 58.67% 73.33% 74.67% 63.00%
OpenWeather   24.00% 48.00% 88.00% 88.00% 62.00%
Persistence   46.97% 33.33% 75.36% 75.36% 57.76%
Pirate Weather   38.67% 46.67% 82.67% 53.33% 55.33%
World Weather Online   29.33% 42.67% 69.33% 69.33% 52.67%

Weather Forecast Accuracy Data Last Year (2025)

Provider High Temp Low Temp Icon Precip Text Precip Overall
Microsoft   86.31% 86.91% 96.60% 96.60% 91.61%
AerisWeather   86.45% 85.30% 96.34% 96.34% 91.11%
Foreca   85.67% 84.53% 96.25% 96.25% 90.67%
The Weather Channel   83.54% 84.72% 96.73% 96.73% 90.43%
Weatherbit   78.87% 80.57% 95.77% 95.77% 87.74%
NWS Digital Forecast   74.71% 80.86% 93.04% 93.04% 85.41%
Pirate Weather   81.69% 56.91% 95.26% 89.93% 80.95%
Open-Meteo   56.34% 65.86% 94.32% 94.32% 77.71%
Wetter.com   52.95% 62.67% 89.41% 89.32% 73.59%
OpenWeather   45.89% 52.22% 95.00% 95.00% 72.03%
Persistence   44.06% 46.77% 84.21% 84.21% 64.81%
World Weather Online   40.85% 41.88% 88.16% 88.16% 64.76%

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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