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——77°56°—
- WednesdayJun 17Overcast10%—86°63°+9°
- ThursdayJun 18Light Drizzle20%—91°68°+5°
- FridayJun 19Overcast18%—81°66°-10°
- SaturdayJun 20Overcast——79°62°-2°
- SundayJun 21Light Drizzle10%0.01″80°61°+1°
- MondayJun 22Heavy Drizzle50%0.26″66°58°-14°
AQI 46 (Good), driven by Ozone. AQI up 5 over the last 6 hours (gradual rise). Ozone at AQI 75 now. With UV 7.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 76 around 1 PM.
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 75 now. With UV 7.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 76 around 1 PM.
- Present
- AQI 75
- UV peak
- 7.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 76
PM × Wind × Precip
PM2.5 at 10.8 µg/m³ (AQI 54) with a 0.97 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- Wind
- light
- 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: 74°F — typical for the season
- 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.
16-Day Forecast — Chester
- Tue77°56°0%
- Wed86°63°10%
- Thu91°68°20%
- Fri81°66°18%
- Sat79°62°1%
- Sun80°61°10%
- Mon66°58°50%
- Tue81°57°46%
- Wed84°62°11%
- Thu87°65°16%
- Fri90°67°16%
- Sat95°68°35%
- Sun98°71°36%
- Mon96°74°33%
- Tue100°77°35%
- Wed99°76°33%
Forecast data from Open-Meteo (CC BY 4.0).
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