New Castle, Pennsylvania Weather
Honeysuckle sweetens the night. Day 90 of spring. Read this microseason across nine climate regions →
New Castle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 17Light Drizzle41%0.02″78°58°—
- ThursdayJun 18Heavy Rain46%1.2″78°57°0°
- FridayJun 19Light Drizzle——73°51°-5°
- SaturdayJun 20Overcast——71°53°-2°
- SundayJun 21Light Rain43%0.42″64°53°-7°
- MondayJun 22Foggy59%—70°54°+6°
- TuesdayJun 23Partly Cloudy30%—77°52°+7°
AQI 44 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). 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.
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 32. Overcast through the UV peak window (cloud cover ~70%) — afternoon ozone should stay flat.
- Present
- AQI 32
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 8:16 AM
- Moonset
- 11:02 PM
- In sign
- ♋︎ Cancer
Honeysuckle sweetens the night
New Castle at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jun 16–20
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
15-Day Forecast — New Castle
- Wed78°58°41%
- Thu78°57°46%
- Fri73°51°6%
- Sat71°53°7%
- Sun64°53°43%
- Mon70°54°59%
- Tue77°52°30%
- Wed66°59°14%
- Thu78°59°27%
- Fri79°55°20%
- Sat86°60°30%
- Sun90°65°49%
- Mon89°70°45%
- Tue89°68°44%
- Wed78°70°49%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 17, 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 — New Castle
SPC has placed New Castle in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 New Castle
- 16102
- 16101
- 16105
- 16103
- 16107