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 70. Northwest wind 8 to 12 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
- Apr 11 to Apr 16, 2026
- Latest sync
- Apr 10, 2026 9:25 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 91 degrees F.
Saturday Night is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Monday at about 14 mph SW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Apr 10, 2026 9:25 AM 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
Mostly clear, with a low around 47. Northeast wind 3 to 7 mph.
Mostly sunny, with a high near 74. Southeast wind 5 to 12 mph.
Mostly cloudy, with a low around 61.
Mostly cloudy, with a high near 81.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 88.
Partly cloudy, with a low around 66.
Partly sunny, with a high near 91.
Mostly cloudy, with a low around 69.
Mostly sunny, with a high near 89.
A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 65.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Sunny
|
70°F |
8 to 12 mph
NW
|
|
Saturday Night
Apr 11
|
Mostly Clear
|
47°F |
3 to 7 mph
NE
|
|
Sunday
Apr 12
|
Mostly Sunny
|
74°F |
5 to 12 mph
SE
|
|
Sunday Night
Apr 12
|
Mostly Cloudy
|
61°F |
12 mph
S
|
|
Monday
Apr 13
|
Mostly Cloudy
|
81°F |
14 mph
SW
|
|
Monday Night
Apr 13
|
Partly Cloudy
|
63°F |
5 to 10 mph
SW
|
|
Tuesday
Apr 14
|
Mostly Sunny
|
88°F |
5 to 8 mph
SW
|
|
Tuesday Night
Apr 14
|
Partly Cloudy
|
66°F |
7 mph
SW
|
|
Wednesday
Apr 15
|
Partly Sunny
|
91°F |
5 to 10 mph
SW
|
|
Wednesday Night
Apr 15
|
Mostly Cloudy
|
69°F |
6 to 10 mph
SW
|
|
Thursday
Apr 16
|
Mostly Sunny
|
89°F |
8 mph
W
|
|
Thursday Night
Apr 16
|
Slight Chance Rain Showers
|
65°F |
5 to 8 mph
NW
|
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.
