Crownsville, Maryland Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Crownsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Rain41%0.15″104°78°—
- SundayJul 5Rain48%0.18″96°75°-8°
- MondayJul 6Drizzle74%0.02″85°74°-11°
- TuesdayJul 7Light Showers74%0.03″78°71°-7°
- WednesdayJul 8Light Drizzle37%0.01″79°69°+1°
- ThursdayJul 9Light Drizzle12%—95°68°+16°
- FridayJul 10Overcast40%—97°75°+2°
AQI 165 (Unhealthy), driven by Ozone. AQI up 30 in the last 6 hours — air quality is degrading. Ozone at AQI 98 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 17 around 1 PM.
LIMIT OUTDOORS Limit prolonged outdoor exertion. Sensitive groups should avoid outdoor exertion. Consider rescheduling outdoor activities until AQI improves.
What's driving it
Ozone × UV × Sky
Ozone at AQI 98 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 17 around 1 PM.
- Present
- AQI 98
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 17
PM × Wind × Precip
PM scrubbed by 3 hours of recent rain — PM2.5 down to 11.7 µg/m³, PM10 to 12.5 µg/m³.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 3h in last 6h
- Pattern
- washed out
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
- 11:23 PM
- Moonset
- 11:16 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Crownsville at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 21032
16-Day Forecast — Crownsville
- Sat104°78°41%
- Sun96°75°48%
- Mon85°74°74%
- Tue78°71°74%
- Wed79°69°37%
- Thu95°68°12%
- Fri97°75°40%
- Sat85°71°33%
- Sun79°70°20%
- Mon85°65°19%
- Tue90°63°19%
- Wed90°65°40%
- Thu90°69°42%
- Fri90°70°35%
- Sat91°71°35%
- Sun91°69°39%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Crownsville
SPC has placed Crownsville 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 Crownsville
- 21401
- 21032