Fairfax, Virginia Weather
Solstice approaches — longest light. Day 88 of spring. Read this microseason across nine climate regions →
Fairfax weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast18%—78°64°—
- TuesdayJun 16Overcast——81°56°+3°
- WednesdayJun 17Overcast——89°65°+8°
- ThursdayJun 18Thunderstorm41%—95°71°+6°
- FridayJun 19Light Drizzle48%—86°70°-9°
- SaturdayJun 20Overcast——80°60°-6°
- SundayJun 21Light Drizzle12%0.01″79°61°-1°
AQI 33 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 42 now. With UV 7.4 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 29 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 now. With UV 7.4 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 29 around 1 PM.
- Present
- AQI 42
- UV peak
- 7.4 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 4.9 µg/m³, PM10 at 5.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 5:45 AM
- Moonset
- 8:49 PM
- In sign
- ♋︎ Cancer
Solstice approaches — longest light
Fairfax at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 9 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Fairfax
- Mon78°64°18%
- Tue81°56°2%
- Wed89°65°9%
- Thu95°71°41%
- Fri86°70°48%
- Sat80°60°8%
- Sun79°61°12%
- Mon68°61°30%
- Tue78°60°28%
- Wed81°60°16%
- Thu83°59°17%
- Fri87°60°32%
- Sat94°66°20%
- Sun96°72°21%
- Mon102°74°30%
- Tue97°72°30%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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.
ZIP codes in Fairfax
- 22031
- 22030
- 22037