Preemption, Illinois Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Preemption weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——82°57°—
- FridayJun 5Rain65%0.28″78°66°-4°
- SaturdayJun 6Showers65%0.33″80°64°+2°
- SundayJun 7Light Showers47%—84°69°+4°
- MondayJun 8Light Showers56%0.01″82°70°-2°
- TuesdayJun 9Overcast39%—82°69°0°
- WednesdayJun 10Thunderstorm21%—91°74°+9°
PM2.5 at 6.1 µg/m³, PM10 at 6.7 µg/m³ — typical background levels with no transport signature. AQI down 25 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 6.1 µg/m³, PM10 at 6.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- Wind
- light
- 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
- 4:36 AM
- Moonset
- 2:01 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Preemption at a glance
- Today vs. normal: 15°F below the seasonal normal for this latitude
- Last frost: April 24 (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 — Preemption
SPC has placed Preemption in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- 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.