5-day weather forecast for San Diego, 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
Provider	High Temp	Low Temp	Icon Precip	Text Precip	Overall
NWS Digital Forecast	73.42%	71.25%	89.87%	89.87%	81.10%
The Weather Channel	65.43%	67.90%	93.83%	93.83%	80.25%
Intellicast	65.43%	67.90%	93.83%	93.83%	80.25%
Weather Underground	64.10%	70.51%	91.03%	91.03%	79.17%
National Weather Service	69.23%	65.38%	91.03%	89.74%	78.85%
CustomWeather	69.14%	53.09%	92.59%	92.59%	76.85%
AccuWeather	68.12%	53.03%	91.30%	89.86%	75.58%
World Weather Online	50.62%	38.27%	93.83%	93.83%	69.14%
Persistence	43.59%	43.42%	84.62%	84.62%	64.06%

Weather Forecast Accuracy Data Last Year
Provider	High Temp	Low Temp	Icon Precip	Text Precip	Overall
The Weather Channel	67.54%	80.19%	90.92%	90.92%	82.39%
Intellicast	67.34%	80.31%	90.87%	90.87%	82.35%
National Weather Service	69.20%	78.24%	88.96%	86.22%	80.65%
NWS Digital Forecast	67.97%	80.20%	86.89%	86.69%	80.44%
CustomWeather	63.02%	68.20%	89.91%	89.91%	77.76%
AccuWeather	59.98%	68.00%	89.09%	89.09%	76.54%
Persistence	44.33%	60.32%	79.11%	79.11%	65.72%

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