Weather forecast accuracy details for Washington, Iowa

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
Weatherbit   56.32% 64.37% 93.10% 93.10% 76.72%
Microsoft   57.65% 60.24% 94.12% 90.59% 75.65%
Foreca/Vaisala   50.57% 59.77% 89.66% 89.66% 72.41%
AccuWeather   50.75% 53.62% 89.55% 91.04% 71.24%
The Weather Channel   43.68% 54.02% 93.10% 93.10% 70.98%
NWS Digital Forecast   50.57% 55.17% 82.76% 82.76% 67.82%
Open-Meteo   54.02% 35.63% 87.36% 87.36% 66.09%
AerisWeather   45.98% 51.72% 81.61% 81.61% 65.23%
OpenWeather   47.13% 36.78% 88.51% 88.51% 65.23%
Pirate Weather   54.02% 21.84% 91.95% 91.95% 64.94%
Wetter   36.78% 34.48% 91.95% 91.95% 63.79%
World Weather Online   43.68% 31.03% 88.51% 88.51% 62.93%
Persistence   20.97% 26.56% 45.16% 45.16% 34.46%

Weather Forecast Accuracy Data Last Year (2023)

Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   75.16% 72.05% 85.66% 85.66% 79.63%
Microsoft   75.12% 74.74% 84.08% 84.08% 79.50%
AccuWeather   74.98% 73.58% 80.09% 79.72% 77.09%
AerisWeather   73.88% 69.77% 82.28% 82.10% 77.01%
Foreca/Vaisala   70.87% 68.13% 82.74% 82.74% 76.12%
Weatherbit   68.94% 65.29% 78.86% 78.86% 72.99%
NWS Digital Forecast   71.31% 69.00% 75.18% 75.18% 72.67%
Wetter   52.84% 52.93% 80.40% 79.21% 66.35%
Pirate Weather   55.46% 34.25% 84.85% 84.85% 64.85%
OpenWeather   45.84% 47.58% 78.81% 78.81% 62.76%
World Weather Online   45.85% 52.15% 74.69% 74.69% 61.84%
Persistence   28.54% 26.78% 61.75% 61.75% 44.70%

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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