Fairfax, Virginia Weather
Honeysuckle sweetens the night. Day 90 of spring. Read this microseason across nine climate regions →
Fairfax weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Overcast——87°62°—
- ThursdayJun 18Overcast43%—97°69°+10°
- FridayJun 19Overcast34%—87°68°-10°
- SaturdayJun 20Overcast——82°63°-5°
- SundayJun 21Light Drizzle16%0.01″90°61°+8°
- MondayJun 22Light Drizzle53%—79°59°-11°
- TuesdayJun 23Partly Cloudy43%—82°60°+3°
AQI 44 (Good), driven by PM2.5. AQI down 30 over the last 6 hours — air quality is improving sharply. PM2.5 at 14.0 µg/m³ (AQI 60) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 14.0 µg/m³ (AQI 60) with a 0.93 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 8:10 AM
- Moonset
- 10:41 PM
- In sign
- ♋︎ Cancer
Honeysuckle sweetens the night
Fairfax at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: April 9 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — Fairfax
- Wed87°62°3%
- Thu97°69°43%
- Fri87°68°34%
- Sat82°63°0%
- Sun90°61°16%
- Mon79°59°53%
- Tue82°60°43%
- Wed88°61°8%
- Thu86°63°24%
- Fri91°67°22%
- Sat101°69°24%
- Sun99°72°36%
- Mon95°68°34%
- Tue82°70°36%
- Wed79°71°46%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Fairfax
SPC has placed Fairfax in the Slight Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWSLGTSlight Risk
- DAY 3SLGTSlight Risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Fairfax
- 22031
- 22030
- 22037