Portland, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Portland weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast29%—99°69°—
- SundayJul 5Rain93%0.27″91°73°-8°
- MondayJul 6Showers93%1.1″71°62°-20°
- TuesdayJul 7Drizzle65%0.11″69°56°-2°
- WednesdayJul 8Overcast13%—84°54°+15°
- ThursdayJul 9Light Drizzle33%—89°61°+5°
- FridayJul 10Light Drizzle41%—85°67°-4°
AQI 48 (Good), driven by PM2.5. AQI up 9 over the last 6 hours (gradual rise). PM2.5 at 10.2 µg/m³ (AQI 53) with a 0.94 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 26 around 1 PM.
- Present
- AQI 42
- UV peak
- 4.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5 at 10.2 µg/m³ (AQI 53) with a 0.94 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- 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
- 10:55 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Portland at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 18351
16-Day Forecast — Portland
- Sat99°69°29%
- Sun91°73°93%
- Mon71°62°93%
- Tue69°56°65%
- Wed84°54°13%
- Thu89°61°33%
- Fri85°67°41%
- Sat82°69°29%
- Sun71°65°34%
- Mon69°62°18%
- Tue81°63°21%
- Wed86°63°30%
- Thu94°69°31%
- Fri95°70°40%
- Sat81°69°42%
- Sun89°64°36%
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 — Portland
SPC has placed Portland in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- 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 Portland
- 18343
- 18351