Herndon Junction, VA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Herndon Junction, VA in one place.
Sunny, with a high near 84. South wind 2 to 6 mph.
Local Weather Overview
This forecast page for Herndon Junction, VA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 14, 2026 1:43 PM EDT.
The active forecast window currently covers Sep 16 to Sep 20, 2026 for Herndon Junction, VA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 1:43 PM EDT
- Forecast office
- LWX
- Source
- NOAA / NWS
Daily Outlook
This Week in Herndon Junction
Thursday looks like the warmest upcoming period in Herndon Junction at 87 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Sunday at about 5 to 9 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 1:43 PM EDT
- Coverage
- 5 days
- Time zone
- America/New_York
- Forecast office
- LWX
- Radar station
- KLWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 61.
Sunny, with a high near 87.
Partly cloudy, with a low around 67.
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
A slight chance of rain showers after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 20%.
A slight chance of rain showers before 2am. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Sunny
|
84°F |
2 to 6 mph
S
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
61°F |
5 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
87°F |
3 to 7 mph
S
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
67°F |
2 to 7 mph
S
|
|
Friday
Sep 18
|
Partly Sunny then Chance Showers And Thunderstorms
|
87°F |
2 to 7 mph
NW
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
66°F |
2 to 6 mph
NE
|
|
Saturday
Sep 19
|
Partly Sunny then Slight Chance Rain Showers
|
85°F |
6 mph
SE
|
|
Saturday Night
Sep 19
|
Slight Chance Rain Showers
|
68°F |
7 mph
S
|
|
Sunday
Sep 20
|
Mostly Sunny then Chance Showers And Thunderstorms
|
86°F |
5 to 9 mph
W
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
66°F |
6 to 9 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Herndon Junction.