Rockville, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Rockville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle41%—100°77°—
- SundayJul 5Light Drizzle43%—95°74°-5°
- MondayJul 6Drizzle76%—84°72°-11°
- TuesdayJul 7Thunderstorm76%0.99″90°68°+6°
- WednesdayJul 8Light Showers37%0.14″76°68°-14°
- ThursdayJul 9Overcast11%—91°66°+15°
- FridayJul 10Light Drizzle45%0.04″90°71°-1°
AQI 88 (Moderate), driven by Ozone. AQI up 37 in the last 6 hours — air quality is degrading. Ozone at AQI 55. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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 55. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 55
- UV peak
- 0.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 9.6 µg/m³, PM10 at 10.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:00 PM
- Moonset
- 10:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Rockville at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 20850, 20851, 20852, 20853
16-Day Forecast — Rockville
- Sat100°77°41%
- Sun95°74°43%
- Mon84°72°76%
- Tue90°68°76%
- Wed76°68°37%
- Thu91°66°11%
- Fri90°71°45%
- Sat90°68°36%
- Sun81°66°23%
- Mon81°68°20%
- Tue86°64°18%
- Wed90°66°33%
- Thu93°69°37%
- Fri85°72°42%
- Sat90°70°44%
- Sun86°70°46%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Rockville
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 — Rockville
SPC has placed Rockville 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 Rockville
- 20850
- 20851
- 20852
- 20847
- 20848
- 20849
- 20857