St. Leonard, Maryland Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
St. Leonard weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast32%—90°74°—
- MondayJul 6Heavy Rain39%1.6″84°75°-6°
- TuesdayJul 7Light Drizzle61%0.02″76°72°-8°
- WednesdayJul 8Light Drizzle60%0.05″78°69°+2°
- ThursdayJul 9Heavy Drizzle36%0.02″91°69°+13°
- FridayJul 10Drizzle35%0.08″92°72°+1°
- SaturdayJul 11Overcast40%—84°69°-8°
AQI 81 (Moderate), driven by Ozone. AQI up 27 in the last 6 hours — air quality is degrading. Ozone at AQI 110 — 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 110 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 110
- UV peak
- 4.2 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 110
PM × Wind × Precip
PM2.5 at 10.6 µg/m³, PM10 at 12.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- 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
- 11:22 PM
- Moonset
- 11:16 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
St. Leonard at a glance
- Today vs. normal: 16°F above the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — St. Leonard
- Sun90°74°32%
- Mon84°75°39%
- Tue76°72°61%
- Wed78°69°60%
- Thu91°69°36%
- Fri92°72°35%
- Sat84°69°40%
- Sun86°71°23%
- Mon95°67°19%
- Tue77°66°14%
- Wed81°64°19%
- Thu87°65°32%
- Fri89°69°39%
- Sat86°70°32%
- Sun79°71°22%
- Mon84°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 — St. Leonard
SPC has placed St. Leonard 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 St. Leonard
- 20685