Chester, Pennsylvania Weather
Honeysuckle sweetens the night. Day 89 of spring. Read this microseason across nine climate regions →
Chester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 16Overcast——78°56°—
- WednesdayJun 17Overcast16%—81°64°+3°
- ThursdayJun 18Thunderstorm30%—92°69°+11°
- FridayJun 19Overcast16%—82°69°-10°
- SaturdayJun 20Mostly Clear——79°63°-3°
- SundayJun 21Overcast10%—81°61°+2°
- MondayJun 22Heavy Drizzle41%0.25″69°59°-12°
AQI 42 (Good), driven by PM2.5. AQI up 8 over the last 6 hours (gradual rise). PM2.5 at 6.6 µg/m³ (AQI 37) with a 0.97 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 6.6 µg/m³ (AQI 37) with a 0.97 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 6:43 AM
- Moonset
- 9:46 PM
- In sign
- ♋︎ Cancer
Honeysuckle sweetens the night
Chester at a glance
- Today vs. normal: 9°F below the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
Right now in the garden
Peak growing season
As of June 16, 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 Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3SLGTSlight Risk
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 Chester
- 19013
- 19016