5-day weather forecast for Willow Grove, Pennsylvania

Weather forecast accuracy details for Philadelphia, Pennsylvania

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.

Click on the headers to sort by that column.
Weather Forecast Accuracy Data Last Month
Provider High Temp Low Temp Icon Precip Text Precip Overall
WeatherBug   78.16% 83.91% 85.06% 85.06% 83.05%
The Weather Channel   70.11% 87.36% 85.06% 85.06% 81.90%
Weather Underground   75.86% 79.31% 81.61% 81.61% 79.60%
National Weather Service   77.01% 82.76% 79.31% 79.31% 79.60%
AccuWeather   75.86% 75.86% 82.76% 82.76% 79.31%
Foreca   65.52% 81.40% 83.91% 83.91% 78.68%
MeteoGroup   67.82% 73.56% 85.06% 85.06% 77.87%
Dark Sky (forecast.io)   58.62% 86.21% 75.86% 75.86% 74.14%
CustomWeather   61.18% 80.95% 72.94% 72.94% 72.00%
Persistence   41.67% 27.38% 53.57% 53.57% 44.05%
Weather Forecast Accuracy Data Last Year
Provider High Temp Low Temp Icon Precip Text Precip Overall
The Weather Channel   79.04% 70.47% 78.56% 78.56% 76.66%
WeatherBug   69.65% 68.17% 79.30% 79.30% 74.10%
Foreca   74.19% 70.88% 75.56% 75.56% 74.05%
MeteoGroup   74.76% 64.04% 78.36% 78.36% 73.88%
AccuWeather   68.42% 68.52% 75.93% 77.00% 72.47%
National Weather Service   71.57% 65.88% 75.29% 74.80% 71.89%
Weather Underground   70.18% 65.11% 77.88% 73.88% 71.76%
CustomWeather   66.08% 64.72% 75.93% 75.93% 70.66%
Persistence   32.51% 29.10% 54.28% 54.28% 42.54%
 
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