Chantilly Weather Forecast
- 44
- 72
Sunny
- 38
- 63
Sunny
- 42
- 64
Mostly Sunny
- 52
- 69
Partly Sunny
- 50
- 74
Rain Showers Likely
- 46
- 65
Slight Chance Rain Showers
- 48
- 68
Mostly Sunny
Today 15 Oct Eastern Loudoun
Sunny. Highs in the lower 70s. North Winds 10 to 15 Mph.
Tonight 15 Oct Eastern Loudoun
Clear. Lows in the lower 40s. North Winds 5 to 10 Mph.
Chantilly Temperature Statistics
October Temperature
Washington/Dulles International Airport, DC (2.5 miles)
Lowest 10 October, 2025
39.9 °FAverage October
62 °FHighest 6 October, 2025
82.9 °F
Climate (2020–Present)
Washington/Dulles International Airport, DC (2.5 miles)
Average Low 2020–2025
47.8 °FAverage 2020–2025
58.3 °FAverage High 2020–2025
68.6 °F