Ellicott City, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Ellicott City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast31%—99°78°—
- SundayJul 5Light Drizzle46%0.01″95°74°-4°
- MondayJul 6Thunderstorm75%—82°72°-13°
- TuesdayJul 7Thunderstorm75%0.13″86°70°+4°
- WednesdayJul 8Showers35%0.13″77°67°-9°
- ThursdayJul 9Overcast13%—89°67°+12°
- FridayJul 10Light Drizzle42%0.04″88°71°-1°
AQI 112 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 59 in the last 6 hours — air quality is degrading. Ozone at AQI 70. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 70. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 70
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 10.0 µg/m³, PM10 at 10.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- 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).
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
Ellicott City at a glance
- Today vs. normal: 13°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 codes: 21042, 21043
16-Day Forecast — Ellicott City
- Sat99°78°31%
- Sun95°74°46%
- Mon82°72°75%
- Tue86°70°75%
- Wed77°67°35%
- Thu89°67°13%
- Fri88°71°42%
- Sat89°70°33%
- Sun80°67°23%
- Mon81°69°19%
- Tue85°65°16%
- Wed87°66°35%
- Thu90°70°46%
- Fri88°73°46%
- Sat90°70°40%
- Sun88°70°52%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Ellicott City
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 — Ellicott City
SPC has placed Ellicott City 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 Ellicott City
- 21042
- 21043
- 21041