5-day weather forecast for Seattle, 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
Provider	High Temp	Low Temp	Icon Precip	Text Precip	Overall
NWS Digital Forecast	77.78%	88.89%	92.59%	92.59%	87.96%
Weather Underground	77.78%	96.30%	80.25%	87.65%	85.49%
CustomWeather	77.78%	92.59%	83.95%	83.95%	84.57%
National Weather Service	76.54%	88.89%	86.42%	86.42%	84.57%
The Weather Channel	80.25%	93.83%	81.48%	81.48%	84.26%
Intellicast	80.25%	93.83%	81.48%	81.48%	84.26%
AccuWeather	80.25%	90.12%	80.25%	82.72%	83.33%
World Weather Online	54.32%	61.73%	66.67%	66.67%	62.35%
Persistence	43.84%	41.67%	56.16%	56.16%	49.46%

Weather Forecast Accuracy Data Last Year
Provider	High Temp	Low Temp	Icon Precip	Text Precip	Overall
The Weather Channel	76.08%	85.22%	77.85%	77.85%	79.25%
Intellicast	75.93%	85.31%	77.69%	77.69%	79.15%
NWS Digital Forecast	73.60%	78.67%	78.19%	78.08%	77.14%
National Weather Service	74.80%	76.26%	78.47%	78.67%	77.05%
CustomWeather	73.68%	72.48%	77.20%	77.20%	75.14%
AccuWeather	70.71%	71.59%	74.79%	79.50%	74.15%
Persistence	49.44%	53.37%	59.86%	59.86%	55.63%

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