Loudoun County Weather Outlook for Sunday, September 20, 2026

🌧️ Cloudy and Damp Sunday

It’ll be a cloudy and humid day with showers here and there. It won’t rain all day, but another round is possible this afternoon. Highs will reach the low 80s.

🌧️ Cooler and Wetter Early This Week

Temperatures cool to near 70 on Monday with scattered showers. Rain becomes more likely Tuesday into Wednesday, with showers and potentially some thunderstorms. Rainfall totals could reach 2 inches or more this week.

🍂 Much Cooler This Week

Highs drop into the low 60s Tuesday, Wednesday, and Thursday. Breezy conditions are also possible.

🌤️ Improving Late Week

Rain chances decrease Thursday, with just a small chance by Friday as skies begin to clear. Temperatures should climb into the mid to upper 60s Friday and Saturday.

✈️ Dry for the Leesburg Air Show?

Saturday currently looks dry, which would be great news for the Leesburg Air Show! Longer term, temperatures look to trend back toward near or slightly above normal, with precipitation near to slightly above normal.

The Forecast:

Sunday: Hi 82 ⛈️70% Lo 61 🌧️50% – Showers likely with possible thunderstorms in the afternoon

Monday: Hi 70 ☁️30% Lo 57 🌧️80% – Slight chance of morning showers, then showers and thunderstorms likely overnight.

Tuesday: Hi 63 🌧️80% Lo 52 🌧️70% – Rainy with possible thunderstorms in the afternoon.

Wednesday: Hi 61 🌧️60% Lo 51 🌧️50% – Showers likely

Thursday: Hi 62 🌧️40% Lo 49 🌧️20% – A chance of showers

Friday: Hi 65 🌧️20% Lo 50 – A slight chance of showers.

Saturday: Hi 67 🌤️ Lo 53 – Mostly sunny skies.