Charlton, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Charlton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers43%0.37″100°75°—
- SundayJul 5Light Rain41%0.07″93°74°-7°
- MondayJul 6Light Drizzle80%—81°71°-12°
- TuesdayJul 7Heavy Showers80%1.3″89°64°+8°
- WednesdayJul 8Light Drizzle16%—81°63°-8°
- ThursdayJul 9Overcast11%—93°64°+12°
- FridayJul 10Light Drizzle44%—88°67°-5°
AQI 82 (Moderate), driven by Ozone. AQI up 29 in the last 6 hours — air quality is degrading. Ozone at AQI 76 — 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 76 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 76
- UV peak
- 2.2 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 76
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 8.1 µg/m³, PM10 to 9.0 µg/m³.
- PM2.5/PM10
- 0.90
- Wind
- light
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 11:04 PM
- Moonset
- 10:15 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Charlton at a glance
- Today vs. normal: 28°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 — Charlton
- Sat100°75°43%
- Sun93°74°41%
- Mon81°71°80%
- Tue89°64°80%
- Wed81°63°16%
- Thu93°64°11%
- Fri88°67°44%
- Sat90°67°29%
- Sun81°63°20%
- Mon81°63°18%
- Tue87°59°17%
- Wed91°60°39%
- Thu93°62°33%
- Fri85°66°33%
- Sat91°68°31%
- Sun85°68°37%
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 — Charlton
SPC has placed Charlton in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight 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 Charlton
- 21722