Cape St. Claire, Maryland Weather
Queen Anne's lace lines the roads. Day 16 of summer. Read this microseason across nine climate regions →
Cape St. Claire weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast60%—95°76°—
- MondayJul 6Rain63%0.16″84°75°-11°
- TuesdayJul 7Heavy Drizzle42%0.04″79°72°-5°
- WednesdayJul 8Drizzle42%0.01″81°70°+2°
- ThursdayJul 9T-storm w/ Hail50%0.02″89°69°+8°
- FridayJul 10Heavy Drizzle41%0.15″91°69°+2°
- SaturdayJul 11Light Drizzle24%—86°72°-5°
AQI 146 (Unhealthy for Sensitive Groups), driven by PM2.5. AQI up 31 in the last 6 hours — air quality is degrading. PM2.5 at 13.8 µg/m³, PM10 at 15.5 µg/m³ — typical background levels with no transport signature.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 56. Overcast through the UV peak window (cloud cover ~62%) — afternoon ozone should stay flat.
- Present
- AQI 56
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 13.8 µg/m³, PM10 at 15.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- 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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 11:46 PM
- Moonset
- 12:22 PM
- In sign
- ♓︎ Pisces
Queen Anne's lace lines the roads
Cape St. Claire at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
16-Day Forecast — Cape St. Claire
- Sun95°76°60%
- Mon84°74°63%
- Tue79°72°42%
- Wed81°70°42%
- Thu89°69°50%
- Fri91°69°41%
- Sat86°72°24%
- Sun85°73°20%
- Mon92°72°21%
- Tue94°75°15%
- Wed87°71°14%
- Thu85°68°26%
- Fri87°69°32%
- Sat71°68°32%
- Sun81°66°26%
- Mon82°72°30%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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 — Cape St. Claire
SPC has placed Cape St. Claire in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
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 Cape St. Claire
- 21409