Harrisburg, Ohio Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Harrisburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——84°52°—
- FridayJun 5Overcast——87°61°+3°
- SaturdayJun 6Drizzle76%—81°63°-6°
- SundayJun 7Heavy Drizzle76%—81°67°0°
- MondayJun 8Light Showers14%—82°65°+1°
- TuesdayJun 9Light Drizzle14%—83°68°+1°
- WednesdayJun 10Drizzle15%—79°68°-4°
PM2.5 at 20.7 µg/m³ (AQI 73) with a 0.95 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 26 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 20.7 µg/m³ (AQI 73) with a 0.95 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
NO₂ × Time of day
NO₂ at AQI 30 during overnight — within the expected overnight baseline, no source signature.
- Present
- AQI 30
- Phase
- overnight calm
- Pattern
- traffic typical
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
- 4:00 AM
- Moonset
- 1:34 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Harrisburg at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: April 15 (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.