North Potomac, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
North Potomac weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast18%—100°78°—
- SundayJul 5Rain44%0.13″96°73°-4°
- MondayJul 6Overcast76%—84°73°-12°
- TuesdayJul 7Thunderstorm76%1.1″91°68°+7°
- WednesdayJul 8Light Rain37%0.09″78°69°-13°
- ThursdayJul 9Overcast11%—92°66°+14°
- FridayJul 10Drizzle46%0.05″88°71°-4°
AQI 89 (Moderate), driven by Ozone. AQI up 36 in the last 6 hours — air quality is degrading. Ozone at AQI 78 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 78 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 78
- UV peak
- 2.1 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 78
PM × Wind × Precip
PM2.5 at 8.6 µg/m³, PM10 at 9.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- 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
- 11:01 PM
- Moonset
- 10:13 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
North Potomac at a glance
- Today vs. normal: 27°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.
16-Day Forecast — North Potomac
- Sat100°78°18%
- Sun96°73°44%
- Mon84°73°76%
- Tue91°68°76%
- Wed78°69°37%
- Thu92°66°11%
- Fri88°71°46%
- Sat90°68°36%
- Sun82°66°24%
- Mon83°67°20%
- Tue87°63°18%
- Wed90°65°33%
- Thu93°68°37%
- Fri83°71°42%
- Sat91°70°44%
- Sun87°70°46%
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 — North Potomac
SPC has placed North Potomac 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 North Potomac
- 20878
- 20850