Hartsburg, Illinois Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Hartsburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——84°58°—
- FridayJun 5Overcast36%—84°67°0°
- SaturdayJun 6Showers43%0.14″86°67°+2°
- SundayJun 7Showers46%0.12″80°70°-6°
- MondayJun 8Heavy Showers73%0.36″83°69°+3°
- TuesdayJun 9Thunderstorm47%—90°71°+7°
- WednesdayJun 10Thunderstorm25%—91°74°+1°
Ozone at AQI 96 — peak already passed at 1 PM under partly cloudy skies. AQI up 22 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 96 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 96
- UV peak
- 5.5 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 96
PM × Wind × Precip
PM2.5 at 6.2 µg/m³, PM10 at 7.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.81
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 4:28 AM
- Moonset
- 1:59 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Hartsburg at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- 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 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 — Hartsburg
SPC has placed Hartsburg in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- 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.