Garrison, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Garrison weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast26%—99°80°—
- SundayJul 5Light Drizzle54%—94°75°-5°
- MondayJul 6Thunderstorm83%0.50″80°72°-14°
- TuesdayJul 7Thunderstorm83%0.26″87°70°+7°
- WednesdayJul 8Light Rain34%0.08″76°66°-11°
- ThursdayJul 9Overcast11%—88°67°+12°
- FridayJul 10Light Drizzle43%0.01″88°72°0°
AQI 95 (Moderate), driven by Ozone. AQI up 44 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.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting 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
- 0.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 7.7 µg/m³, PM10 at 8.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- Wind
- light
- 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
Garrison at a glance
- Today vs. normal: 26°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.
16-Day Forecast — Garrison
- Sat99°80°26%
- Sun94°75°54%
- Mon80°72°83%
- Tue87°70°83%
- Wed76°66°34%
- Thu88°67°11%
- Fri88°72°43%
- Sat88°70°33%
- Sun79°67°26%
- Mon80°69°18%
- Tue85°66°16%
- Wed88°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 — Garrison
SPC has placed Garrison 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 Garrison
- 21117
- 21208