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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

St. Leonard, MD
Saturday, July 4 at 10:24 PM
78
°
Light Drizzle
Feels like
82°
Humidity
78%
Wind
9 mph
Sunrise
1:47 AM
Sunset
4:33 PM
St. Leonard, MD
Hour by hour · 24h
24-Hour ForecastSt. Leonard, MD: 24-hour forecast. Temperatures range from 74 to 92 degrees Fahrenheit with a 35% chance of precipitation at 10 PM.
L 74°H 92°
St. Leonard, MD
7-day forecast
  1. Today
    Jul 4
    Rain
    36%
    0.20″
    98°77°
  2. Sunday
    Jul 5
    Light Drizzle
    22%
    0.02″
    92°74°-6°
  3. Monday
    Jul 6
    Light Drizzle
    71%
    89°76°-3°
  4. Tuesday
    Jul 7
    Thunderstorm
    71%
    81°72°-8°
  5. Wednesday
    Jul 8
    Light Drizzle
    36%
    0.01″
    80°70°-1°
  6. Thursday
    Jul 9
    Overcast
    13%
    95°69°+15°
  7. Friday
    Jul 10
    Drizzle
    35%
    0.05″
    99°74°+4°
St. Leonard, MD
Anemometer · 24h winds · from true
NESW
From · True
W
261° · veering 72°
Direction
W
261°
Sustained
9
mph
Gust
22
mph
Peak 24h
22
avg 5
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 5 · pk 22
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 406SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 72° from the w.
St. Leonard, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1012.1
+2.1 mb in 3h · rising rapidly · 29.89 inHg
Now
1012.1
mb
3h
+2.1
mb
12h
-0.8
mb
24h
-0.8
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 10091013
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.81008.71011.8
−24h−18h−12h−6hnow
Pressure climbing through the change line — drier air pushing in.
St. Leonard, MD
Air quality
152
AQI
Unhealthy
+4 in 6h

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.

PM 2.5Moderate
14.0μg/m³
PM 10Good
15μg/m³
NO₂Good
5μg/m³
OzoneDRIVERUnhealthy SG
129μg/m³
UV IndexLow
0.0

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
St. Leonard, MD
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow

Visibility
41.2mi
UNLIMITED
89 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
02:24 UTC · St. Leonard, MD · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
02:24 UTC · St. Leonard, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
St. Leonard, MD
Satellite · infrared · animated
St. Leonard, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
St. Leonard, MD
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:16 AM
Sunrise
1:47 AM
Daylight
14h 46m
Sunset
4:33 PM
Civil dusk
9:06 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
St. Leonard, MD
The moon
Waning Gibbous
77% illuminated
Moonrise
11:22 PM
Moonset
11:16 AM
In sign
♓︎ Pisces
St. Leonard, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

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

  1. Sat98°77°36%
  2. Sun92°74°22%
  3. Mon89°76°71%
  4. Tue81°72°71%
  5. Wed80°70°36%
  6. Thu95°69°13%
  7. Fri99°74°35%
  8. Sat80°71°39%
  9. Sun78°70°32%
  10. Mon83°65°18%
  11. Tue87°64°16%
  12. Wed92°67°25%
  13. Thu84°68°32%
  14. Fri88°70°36%
  15. Sat91°72°41%
  16. 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

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.