South New Castle, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
South New Castle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain66%0.70″92°69°—
- SundayJul 5Showers74%0.28″84°69°-8°
- MondayJul 6T-storm w/ Hail67%0.22″79°65°-5°
- TuesdayJul 7Light Drizzle23%—83°63°+4°
- WednesdayJul 8Partly Cloudy——85°61°+2°
- ThursdayJul 9Light Drizzle49%—85°64°0°
- FridayJul 10Light Drizzle48%—82°66°-3°
AQI 43 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.3 µg/m³ (AQI 51) with a 0.98 fine-to-coarse ratio and 3 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 6 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41. Overcast through the UV peak window (cloud cover ~80%) — afternoon ozone should stay flat.
- Present
- AQI 41
- UV peak
- 3.7 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 9.3 µg/m³ (AQI 51) with a 0.98 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.98
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:17 PM
- Moonset
- 10:24 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
South New Castle at a glance
- Today vs. normal: 73°F — typical for the season
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — South New Castle
- Sat92°69°66%
- Sun84°69°74%
- Mon79°65°67%
- Tue83°63°23%
- Wed85°61°8%
- Thu85°64°49%
- Fri82°66°48%
- Sat83°64°33%
- Sun77°61°25%
- Mon71°57°16%
- Tue78°57°14%
- Wed87°65°33%
- Thu89°66°29%
- Fri84°69°49%
- Sat83°68°39%
- Sun84°62°35%
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 — South New Castle
SPC has placed South New Castle in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 South New Castle
- 16102