| NWS Forecast for: Fairfax County Issued by: National Weather Service Baltimore, MD/Washington, D.C. Last Update: 455 PM EDT Sat Sep 19 2026 | |
| Rest Of This Afternoon: Partly sunny. Highs in the upper 70s. Southeast winds around 5 mph. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 60s. Southeast winds 5 to 10 mph. Sunday: Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 40 percent. Sunday Night: A chance of thunderstorms in the evening. Showers likely. Lows in the mid 60s. Southwest winds around 5 mph, becoming north after midnight. Chance of rain 70 percent. Monday: Mostly cloudy with a 50 percent chance of showers. Highs in the mid 70s. Northeast winds around 10 mph. Monday Night: Cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent. Tuesday: Cloudy with a chance of showers. Highs in the upper 60s. Chance of rain 50 percent. Tuesday Night: Mostly cloudy with a 50 percent chance of showers. Lows in the upper 50s. Wednesday: Mostly cloudy with a 50 percent chance of showers. Highs in the mid 60s. Wednesday Night: Mostly cloudy with a 40 percent chance of showers. Lows in the mid 50s. Thursday: Mostly cloudy with a 40 percent chance of showers. Highs in the mid 60s. Thursday Night: Mostly cloudy with a 30 percent chance of showers. Lows in the mid 50s. Friday: Partly sunny. Highs in the upper 60s. | |
| Zone Forecast: Fairfax County | |
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