Monongahela, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Monongahela weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——80°47°—
- ThursdayJun 4Overcast——83°55°+3°
- FridayJun 5Overcast——83°57°0°
- SaturdayJun 6Light Showers81%—84°59°+1°
- SundayJun 7Heavy Drizzle81%—80°63°-4°
- MondayJun 8Overcast——84°59°+4°
- TuesdayJun 9Mostly Clear10%—86°62°+2°
PM2.5 at 20.8 µg/m³ (AQI 73) with a 0.99 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI up 29 in the last 6 hours — air quality is degrading.
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 45 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 11 by mid-afternoon.
- Present
- AQI 45
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 11
PM × Wind × Precip
PM2.5 at 20.8 µg/m³ (AQI 73) with a 0.99 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.99
- 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
- 3:48 AM
- Moonset
- 1:19 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Monongahela at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: April 17 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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.