Greensburg, Pennsylvania Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Greensburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——79°46°—
- ThursdayJun 4Overcast——83°53°+4°
- FridayJun 5Overcast——80°57°-3°
- SaturdayJun 6Light Showers78%—81°62°+1°
- SundayJun 7Showers78%—77°63°-4°
- MondayJun 8Partly Cloudy——75°57°-2°
- TuesdayJun 9Clear——82°54°+7°
Ozone at AQI 65 now. AQI up 8 over the last 6 hours (gradual rise). With UV 7.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 68 by mid-afternoon.
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 65 now. With UV 7.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 68 by mid-afternoon.
- Present
- AQI 65
- UV peak
- 7.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 68
PM × Wind × Precip
PM2.5 at 7.9 µg/m³ (AQI 44) with a 0.85 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:09 AM
- Moonset
- 12:13 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Greensburg at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: April 18 (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 3, 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.