5-day weather forecast for Clarksburg, Maryland
Today
61°
78°
Partly Sunny
Thursday
58°
81°
Mostly Sunny
Friday
62°
84°
Mostly Sunny
Saturday
63°
86°
Partly Sunny
Sunday
66°
87°
Slight Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Herndon, Virginia
Unfortunately, there was not enough data for this station to provide meaningful weather changeability data.
Weather forecast accuracy for Herndon, Virginia
| The Weather Channel | 72.02% |
| Intellicast | 72.02% |
| Weather Underground | 72.02% |
| National Weather Service | 70.24% |
| NWS Digital Forecast | 70.24% |
| AccuWeather | 69.05% |
| CustomWeather | 66.96% |
| World Weather Online | 60.80% |
| Persistence | 40.71% |
| Intellicast | 73.52% |
| The Weather Channel | 73.40% |
| AccuWeather | 71.89% |
| National Weather Service | 70.64% |
| CustomWeather | 69.78% |
| NWS Digital Forecast | 69.03% |
| Persistence | 44.50% |
ForecastAdvisor Fact
58.0% of CustomWeather's low temperature forecasts for Herndon were within 3 degrees of actual temperatures last year.