Wilmington, Illinois Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Wilmington weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——87°57°—
- FridayJun 5Light Drizzle76%—81°68°-6°
- SaturdayJun 6Showers58%0.02″82°67°+1°
- SundayJun 7Light Showers21%—85°69°+3°
- MondayJun 8Light Showers41%—81°69°-4°
- TuesdayJun 9Light Drizzle29%—84°68°+3°
- WednesdayJun 10Drizzle21%—89°72°+5°
Ozone at AQI 35. AQI down 16 over the last 6 hours — air quality is improving sharply. Overcast through the UV peak window (cloud cover ~72%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 AM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35. Overcast through the UV peak window (cloud cover ~72%) — afternoon ozone should stay flat.
- Present
- AQI 35
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 5.4 µg/m³, PM10 at 6.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.90
- 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
- 4:26 AM
- Moonset
- 1:50 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Wilmington at a glance
- Today vs. normal: 10°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 — Wilmington
SPC has placed Wilmington 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.