Green Valley, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Green Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast24%—99°75°—
- SundayJul 5Drizzle46%0.03″95°74°-4°
- MondayJul 6Showers76%0.09″80°70°-15°
- TuesdayJul 7Thunderstorm76%0.52″85°68°+5°
- WednesdayJul 8Heavy Drizzle35%0.05″76°67°-9°
- ThursdayJul 9Overcast11%—89°65°+13°
- FridayJul 10Light Drizzle43%0.02″86°69°-3°
AQI 89 (Moderate), driven by Ozone. AQI up 36 in the last 6 hours — air quality is degrading. Ozone at AQI 78 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 78 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 78
- UV peak
- 2.1 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 78
PM × Wind × Precip
PM2.5 at 8.6 µg/m³ (AQI 48) with a 0.91 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:01 PM
- Moonset
- 10:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Green Valley at a glance
- Today vs. normal: 27°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Green Valley
- Sat99°75°24%
- Sun95°74°46%
- Mon80°70°76%
- Tue85°68°76%
- Wed76°67°35%
- Thu89°65°11%
- Fri86°69°43%
- Sat87°68°32%
- Sun79°64°24%
- Mon80°65°19%
- Tue84°62°17%
- Wed86°63°35%
- Thu90°68°46%
- Fri88°70°46%
- Sat90°68°40%
- Sun87°68°52%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Green Valley
SPC has placed Green Valley in the Enhanced Risk category for severe thunderstorms today.
- TODAYENHEnhanced Risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Green Valley
- 21770
- 21771
- 21754