Randallstown, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Randallstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast21%—99°79°—
- SundayJul 5Light Drizzle45%0.02″94°73°-5°
- MondayJul 6Thunderstorm81%0.15″80°72°-14°
- TuesdayJul 7Thunderstorm81%0.26″86°70°+6°
- WednesdayJul 8Light Rain34%0.08″76°66°-10°
- ThursdayJul 9Overcast12%—88°67°+12°
- FridayJul 10Light Drizzle43%0.01″88°71°0°
AQI 112 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 58 in the last 6 hours — air quality is degrading. Ozone at AQI 100 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 100 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 100
- UV peak
- 2.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 100
PM × Wind × Precip
PM2.5 at 8.6 µg/m³ (AQI 48) with a 0.90 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 10:59 PM
- Moonset
- 10:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Randallstown at a glance
- Today vs. normal: 27°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 21133
16-Day Forecast — Randallstown
- Sat99°79°21%
- Sun94°73°45%
- Mon80°72°81%
- Tue86°70°81%
- Wed76°66°34%
- Thu88°67°12%
- Fri88°71°43%
- Sat88°69°33%
- Sun79°67°26%
- Mon80°68°18%
- Tue85°66°16%
- Wed87°67°35%
- Thu90°72°46%
- Fri88°74°46%
- Sat92°72°40%
- Sun87°71°52%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Randallstown
SPC has placed Randallstown 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 Randallstown
- 21163
- 21208
- 21133