Chester, Maryland Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Chester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain30%0.58″101°75°—
- SundayJul 5Overcast44%—96°76°-5°
- MondayJul 6Heavy Drizzle75%0.02″86°74°-10°
- TuesdayJul 7Thunderstorm71%—82°73°-4°
- WednesdayJul 8Showers37%0.53″77°71°-5°
- ThursdayJul 9Overcast——85°73°+8°
- FridayJul 10Overcast33%—90°76°+5°
AQI 153 (Unhealthy), driven by Ozone. AQI up 96 in the last 6 hours — air quality is degrading. Ozone at AQI 135 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
LIMIT OUTDOORS Limit prolonged outdoor exertion. Sensitive groups should avoid outdoor exertion. Consider rescheduling outdoor activities until AQI improves.
What's driving it
Ozone × UV × Sky
Ozone at AQI 135 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 135
- UV peak
- 2.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 135
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 12.7 µg/m³, PM10 to 13.9 µg/m³.
- PM2.5/PM10
- 0.91
- 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
- 10:57 PM
- Moonset
- 10:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Chester at a glance
- Today vs. normal: 26°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 21619
16-Day Forecast — Chester
- Sat101°75°30%
- Sun96°76°44%
- Mon86°74°75%
- Tue82°73°71%
- Wed77°71°37%
- Thu85°73°9%
- Fri90°76°33%
- Sat88°77°31%
- Sun83°75°20%
- Mon79°73°16%
- Tue84°73°16%
- Wed85°75°34%
- Thu85°76°35%
- Fri84°79°32%
- Sat88°77°35%
- Sun87°77°43%
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 — Chester
SPC has placed Chester 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 Chester
- 21619