National, Maryland Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
National weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast24%—89°71°—
- SundayJul 5Showers41%0.25″88°70°-1°
- MondayJul 6T-storm w/ Hail89%0.11″80°68°-8°
- TuesdayJul 7Thunderstorm64%—75°65°-5°
- WednesdayJul 8Light Showers21%0.06″72°66°-3°
- ThursdayJul 9Overcast12%—86°64°+14°
- FridayJul 10Drizzle50%0.09″81°69°-5°
AQI 72 (Moderate), driven by PM2.5. AQI up 21 in the last 6 hours — air quality is degrading. PM2.5 at 8.0 µg/m³, PM10 at 8.4 µg/m³ — typical background levels with no transport signature.
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 43. Overcast through the UV peak window (cloud cover ~97%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 8.0 µg/m³, PM10 at 8.4 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
- 11:33 PM
- Moonset
- 11:26 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
National at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — National
- Sat89°71°24%
- Sun88°70°41%
- Mon80°68°89%
- Tue75°65°64%
- Wed72°66°21%
- Thu86°64°12%
- Fri81°69°50%
- Sat73°62°29%
- Sun74°59°24%
- Mon79°54°22%
- Tue84°60°19%
- Wed78°61°39%
- Thu80°57°42%
- Fri82°61°44%
- Sat87°65°42%
- Sun74°65°47%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — National
SPC has placed National in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 National
- 21532