5-day weather forecast for Westtown, Pennsylvania
Today
66°
87°
Slight Chance Thunderstorms
Sunday
68°
87°
Slight Chance Thunderstorms
Monday
69°
89°
Slight Chance Thunderstorms
Tuesday
71°
89°
Chance Thunderstorms
Wednesday
70°
86°
Slight Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Philadelphia, Pennsylvania
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 7.0° | 5.7° |
| Average change in low temperature day-to-day | 5.6° | 5.8° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 50% | 56% |
| Chance of precip day after a dry day | 14% | 26% |
Weather forecast accuracy for Philadelphia, Pennsylvania
| The Weather Channel | 83.05% |
| Intellicast | 82.76% |
| AccuWeather | 75.57% |
| CustomWeather | 69.83% |
| National Weather Service | 69.54% |
| Weather Underground | 68.39% |
| NWS Digital Forecast | 61.56% |
| World Weather Online | 58.91% |
| Persistence | 45.83% |
| The Weather Channel | 77.97% |
| Intellicast | 76.97% |
| AccuWeather | 75.69% |
| National Weather Service | 73.86% |
| CustomWeather | 71.65% |
| NWS Digital Forecast | 71.37% |
| Persistence | 45.52% |
ForecastAdvisor Fact
2.2% of National Weather Service's high temperature forecasts for Philadelphia were off by more than 10 degrees last year.