Columbia, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Columbia weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle21%—100°79°—
- SundayJul 5Light Rain41%0.09″95°73°-5°
- MondayJul 6Heavy Drizzle75%—82°74°-13°
- TuesdayJul 7Thunderstorm75%0.16″88°70°+6°
- WednesdayJul 8Showers36%0.26″78°69°-10°
- ThursdayJul 9Overcast14%—91°68°+13°
- FridayJul 10Light Drizzle42%0.02″91°73°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
Columbia at a glance
- Today vs. normal: 28°F above the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 21044, 21045, 21046
16-Day Forecast — Columbia
- Sat100°79°21%
- Sun95°73°41%
- Mon82°74°75%
- Tue88°70°75%
- Wed78°69°36%
- Thu91°68°14%
- Fri91°73°42%
- Sat90°71°34%
- Sun81°70°22%
- Mon81°71°19%
- Tue86°68°16%
- Wed90°70°33%
- Thu92°72°37%
- Fri89°74°42%
- Sat90°71°44%
- Sun89°72°46%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Columbia
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 — Columbia
SPC has placed Columbia 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 Columbia
- 21044
- 21045
- 21046
- 21029
- 20588
- 21150