| NWS Forecast for: Fairfax County Issued by: National Weather Service Baltimore, MD/Washington, D.C. Last Update: 246 AM EDT Mon Jun 29 2026 |  |
| Overnight: Mostly cloudy. Patchy fog. Lows in the upper 60s. Light and variable winds. Monday: Patchy fog in the morning. Mostly sunny. Highs in the mid 80s. East winds around 5 mph. Monday Night: Mostly clear. Lows in the upper 60s. South winds around 5 mph. Tuesday: Sunny. Highs in the upper 80s. South winds 5 to 10 mph. Tuesday Night: Mostly clear. Lows around 70. South winds 5 to 10 mph. Wednesday: Sunny, hot with highs in the upper 90s. Wednesday Night: Mostly clear. Lows in the mid 70s. Thursday: Sunny, hot with highs around 100. Heat index values up to 110. Thursday Night: Clear. Lows in the upper 70s. Friday: Sunny, hot with highs 100 to 105. Heat index values up to 110. Friday Night: Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 30 percent. Independence Day: Mostly sunny with a chance of showers and thunderstorms. Hot with highs around 100. Chance of rain 40 percent. Heat index values up to 110. Saturday Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 50 percent. Sunday: Mostly sunny with a chance of showers and thunderstorms. Hot with highs in the mid 90s. Chance of rain 30 percent. | |
| Zone Forecast: Fairfax County | |
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