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Chantilly, VA Weather

It is 45°F and clear in Chantilly, VA, observed at 4:25 AM EDT. Today: Mostly Sunny, high 63°F, low 43°F. Hourly and 10-day forecast from the National Weather Service. Times are local (EDT).

Chantilly, VA current weather

45°F

Clear

H 63° / L 43°Feels like 45°

7° cooler than yesterday at this time

Observed at Washington/Dulles International Airport, DC (3.4 mi away), 10/31/2026, 4:25 AM EDT

Hourly forecast

NWS, updated 10/30/2026, 11:22 PM PT

  1. Now47°
  2. 5 AM46°
  3. 6 AM45°
  4. 7 AM44°
  5. 8 AM45°
  6. 9 AM47°
  7. 10 AM53°
  8. 11 AM56°
  9. 12 PM58°
  10. 1 PM60°
  11. 2 PM61°
  12. 3 PM62°
  13. 4 PM62°
  14. 5 PM61°
  15. 6 PM59°
  16. 7 PM57°
  17. 8 PM53°
  18. 9 PM52°
  19. 10 PM50°
  20. 11 PM49°
  21. 12 AM48°Sun
  22. 1 AM47°
  23. 1 AM45°
  24. 2 AM46°
  25. 3 AM45°
  26. 4 AM45°
  27. 5 AM45°
  28. 6 AM45°
  29. 7 AM45°
  30. 8 AM48°
  31. 9 AM54°
  32. 10 AM58°
  33. 11 AM60°
  34. 12 PM63°
  35. 1 PM64°
  36. 2 PM64°
  37. 3 PM65°
  38. 4 PM64°
  39. 5 PM61°
  40. 6 PM58°
  41. 7 PM53°
  42. 8 PM51°
  43. 9 PM50°
  44. 10 PM49°
  45. 11 PM47°
  46. 12 AM46°Mon
  47. 1 AM46°
  48. 2 AM45°

10-day forecast

Tap a day for details

  • Today10/31Low 43°High 63°

    Saturday: Mostly sunny, with a high near 63. North wind around 6 mph.

    Overnight: Mostly clear, with a low around 43. North wind around 5 mph.

    Mostly Sunny
  • Sun11/1Low 43°High 65°

    Sunday: Partly sunny, with a high near 65. Southeast wind 0 to 3 mph.

    Sunday Night: Partly cloudy, with a low around 43. South wind around 2 mph.

    Partly Sunny
  • Mon11/2Low 45°High 66°

    Monday: Partly sunny, with a high near 66.

    Monday Night: Partly cloudy, with a low around 45.

    Partly Sunny
  • Tue11/3Low 53°High 71°

    Tuesday: Mostly sunny, with a high near 71.

    Tuesday Night: Mostly cloudy, with a low around 53.

    Mostly Sunny
  • Wed11/447% chance of precipitationLow 58°High 73°

    Wednesday: A slight chance of rain showers after 1pm. Partly sunny, with a high near 73. Chance of precipitation is 20%.

    Wednesday Night: A chance of rain showers. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.

    Partly Sunny then Slight Chance Rain Showers
  • Thu11/559% chance of precipitationLow 57°High 73°

    Thursday: A chance of rain showers before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.

    Showers And Thunderstorms Likely
  • Fri11/650% chance of precipitationLow High 71°

    Friday: A chance of rain showers. Mostly cloudy, with a high near 71.

    Chance Rain Showers
  • Sat11/7Model blend19% chance of precipitationLow 47°High 66°

    Saturday: Partly cloudy, slight chance of rain. High near 66°. Low that night near 47°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sun11/8Model blend12% chance of precipitationLow 44°High 64°

    Sunday: Partly cloudy. High near 64°. Low that night near 44°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Mon11/9Model blend26% chance of precipitationLow 43°High 63°

    Monday: Partly cloudy, slight chance of rain. High near 63°. Low that night near 43°. About 0.11 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 38.886, -77.449 from the NWS LWX office, updated 10/30/2026, 11:22 PM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KIAD (Washington/Dulles Intl, 3 mi), model run 10/30/2026, 10:00 PM EDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now47°Mostly Clear0%3 mph
  2. 5 AM46°Mostly Clear0%3 mph
  3. 6 AM45°Mostly Sunny0%3 mph
  4. 7 AM44°Mostly Sunny0%3 mph
  5. 8 AM45°Mostly Sunny0%3 mph
  6. 9 AM47°Mostly Sunny1%5 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Observed today

Since midnight, vs yesterday and normal

Today's high so far is 6° below the normal of 62° and 20° cooler than yesterday's high.

High so far
55°
6° below normal
Low so far
44°
Normal low 40°
Precipitation
0.00 in
Since midnight
Yesterday
High 75° · Low 50° · Precip 0.00 in
Normal for today
High 62° · Low 40°

Observed at Washington/Dulles International Airport, DC (KIAD) since midnight local time, through 4:25 AM. Station reports are preliminary and not quality controlled. Normals are estimated from 1991 to 2020 monthly normals at Washington Dc Dulles AP.

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the weather in Chantilly, VA right now?
The latest observation from Washington/Dulles International Airport, DC was 45°F and clear, reported at 10/31/2026, 4:25 AM EDT.
What is the high temperature today in Chantilly, VA?
The National Weather Service forecast for saturday calls for a high near 63°F. Mostly Sunny.
Will it rain in Chantilly, VA in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Chantilly, VA?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 7 to Nov 9) come from the NOAA National Blend of Models, with highs of 63°F to 66°F. Model guidance this far out often changes.
What time is sunrise and sunset in Chantilly, VA today?
Sunrise is about 7:36 AM EDT and sunset is about 6:10 PM EDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Chantilly, VA?
At Washington Dc Dulles AP, the 1991 to 2020 normal high in October is 68°F and the normal low is 45°F.

Nearby hazards

Virginia hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

AQI forecast today (Northern Virginia)
44GoodPM2.5
AQI forecast tomorrow (Northern Virginia)
44GoodPM2.5

UV index guide · Air quality

Drought

By county

Fairfax County, week of 10/27/2026

45% of the county is abnormally dry. No drought.

Tides nearby

NOAA tide stations

Sun and moon

Local time, center of the area

Sunrise
7:36 AM
Sunset
6:10 PM
Daylight
10 hr 34 min
Moon
Waning Gibbous 72% lit
First light (civil dawn)
7:08 AM
Last light (civil dusk)
6:38 PM
Moonrise
11:07 PM
Moonset
1:35 PM

Normal October weather

Climate

Normal October high 68°, low 45°, precipitation 3.65 in for the month. 1991 to 2020 normals at Washington Dc Dulles AP, 4 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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