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 4Rain36%0.20″98°77°—
- SundayJul 5Light Drizzle22%0.02″92°74°-6°
- MondayJul 6Light Drizzle71%—89°76°-3°
- TuesdayJul 7Thunderstorm71%—81°72°-8°
- WednesdayJul 8Light Drizzle36%0.01″80°70°-1°
- ThursdayJul 9Overcast13%—95°69°+15°
- FridayJul 10Drizzle35%0.05″99°74°+4°
AQI 152 (Unhealthy), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 86 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 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 86 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 around 1 PM.
- Present
- AQI 86
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 15
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 14.0 µg/m³, PM10 to 15.4 µg/m³.
- PM2.5/PM10
- 0.91
- Wind
- light
- Recent rain
- 2h 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
- 11:22 PM
- Moonset
- 11:16 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
St. Leonard at a glance
- Today vs. normal: 5°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
- Sat98°77°36%
- Sun92°74°22%
- Mon89°76°71%
- Tue81°72°71%
- Wed80°70°36%
- Thu95°69°13%
- Fri99°74°35%
- Sat80°71°39%
- Sun78°70°32%
- Mon83°65°18%
- Tue87°64°16%
- Wed92°67°25%
- Thu84°68°32%
- Fri88°70°36%
- Sat91°72°41%
- Sun93°70°48%
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
- TOMORROWSLGTSlight 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