Fairfax County, VA Weather Forecast
County weather hub
Mostly Clear
Compare major city weather across Fairfax County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear, with a low around 54. West wind around 2 mph.
County Weather Overview
This county weather page brings together forecast coverage for Fairfax County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 9 of 9 mapped cities in Fairfax County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 5:13 AM EDT
- Forecast office
- LWX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fairfax County
Wednesday looks like the warmest upcoming period in Fairfax County at 87 degrees F.
Saturday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Friday at about 10 to 20 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 5:13 AM EDT
- Coverage
- 7 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
Sunny, with a high near 81. Southwest wind 2 to 9 mph.
Clear, with a low around 63. Southwest wind 3 to 8 mph.
Sunny, with a high near 87. Southwest wind 3 to 7 mph.
A slight chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 64. Northwest wind 3 to 7 mph. Chance of precipitation is 20%.
A chance of rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
A chance of rain showers before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 47. Chance of precipitation is 40%.
Sunny, with a high near 56.
Mostly clear, with a low around 39.
Sunny, with a high near 59.
Mostly clear, with a low around 41.
Sunny, with a high near 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 13
|
Mostly Clear
|
54°F |
2 mph
W
|
|
Tuesday
Oct 13
|
Sunny
|
81°F |
2 to 9 mph
SW
|
|
Tuesday Night
Oct 13
|
Clear
|
63°F |
3 to 8 mph
SW
|
|
Wednesday
Oct 14
|
Sunny
|
87°F |
3 to 7 mph
SW
|
|
Wednesday Night
Oct 14
|
Slight Chance Showers And Thunderstorms
|
64°F |
3 to 7 mph
NW
|
|
Thursday
Oct 15
|
Chance Rain Showers
|
68°F |
3 to 8 mph
NE
|
|
Thursday Night
Oct 15
|
Chance Rain Showers
|
59°F |
3 to 9 mph
SE
|
|
Friday
Oct 16
|
Chance Rain Showers
|
78°F |
10 to 20 mph
SW
|
|
Friday Night
Oct 16
|
Chance Showers And Thunderstorms then Partly Cloudy
|
47°F |
16 to 20 mph
NW
|
|
Saturday
Oct 17
|
Sunny
|
56°F |
15 to 18 mph
NW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
39°F |
3 to 13 mph
NW
|
|
Sunday
Oct 18
|
Sunny
|
59°F |
6 mph
W
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
41°F |
6 mph
S
|
|
Monday
Oct 19
|
Sunny
|
64°F |
7 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Fairfax County.
Coverage
Forecast coverage currently spans 9 of 9 mapped cities in Fairfax County.
Largest mapped city population in this region: 48,115.
