Fairfax County, VA Weather Forecast
County weather hub
Sunny
Compare major city weather across Fairfax County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 90. Southwest wind around 5 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
- Jul 14 to Jul 19, 2026
- Latest sync
- Jul 13, 2026 4:07 PM 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 98 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 71 degrees F.
The strongest winds are forecast for Saturday at about 3 to 9 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 13, 2026 4:07 PM EDT
- Coverage
- 6 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
Clear, with a low around 71. Southwest wind around 6 mph.
Sunny, with a high near 98. West wind 5 to 8 mph.
Mostly clear, with a low around 76.
Mostly sunny, with a high near 97.
Mostly clear, with a low around 75.
Sunny, with a high near 95.
Partly cloudy, with a low around 74.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.
A slight chance of rain showers before 8am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
5 mph
SW
|
|
Tuesday Night
Jul 14
|
Clear
|
71°F |
6 mph
SW
|
|
Wednesday
Jul 15
|
Sunny
|
98°F |
5 to 8 mph
W
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
76°F |
5 to 8 mph
W
|
|
Thursday
Jul 16
|
Mostly Sunny
|
97°F |
3 to 8 mph
NW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
75°F |
5 to 8 mph
NW
|
|
Friday
Jul 17
|
Sunny
|
95°F |
3 to 7 mph
NW
|
|
Friday Night
Jul 17
|
Partly Cloudy
|
74°F |
2 to 6 mph
NW
|
|
Saturday
Jul 18
|
Mostly Sunny then Chance Showers And Thunderstorms
|
94°F |
3 to 9 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
73°F |
5 to 8 mph
W
|
|
Sunday
Jul 19
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
92°F |
6 to 9 mph
W
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms
|
72°F |
5 to 8 mph
SW
|
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.
