Seneca, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Seneca weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain66%0.56″90°66°—
- SundayJul 5Drizzle76%0.04″83°67°-7°
- MondayJul 6Thunderstorm74%0.16″74°63°-9°
- TuesdayJul 7Overcast27%—85°59°+11°
- WednesdayJul 8Overcast10%—86°58°+1°
- ThursdayJul 9Light Drizzle45%0.01″86°61°0°
- FridayJul 10Light Drizzle45%—81°64°-5°
AQI 45 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.6 µg/m³ (AQI 48) 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 34. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.
- Present
- AQI 34
- UV peak
- 3.7 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 8.6 µg/m³ (AQI 48) 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:15 PM
- Moonset
- 10:21 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Seneca at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 16346
16-Day Forecast — Seneca
- Sat90°66°66%
- Sun83°67°76%
- Mon74°63°74%
- Tue85°59°27%
- Wed86°58°10%
- Thu86°61°45%
- Fri81°64°45%
- Sat85°63°33%
- Sun76°61°27%
- Mon71°58°18%
- Tue77°57°18%
- Wed85°64°36%
- Thu90°64°39%
- Fri85°66°49%
- Sat82°67°33%
- Sun86°60°38%
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 — Seneca
SPC has placed Seneca in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 Seneca
- 16346