Roanoke, Illinois Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Roanoke weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——84°57°—
- FridayJun 5Drizzle30%0.03″84°68°0°
- SaturdayJun 6Light Showers65%—83°70°-1°
- SundayJun 7Showers33%—82°70°-1°
- MondayJun 8Showers67%0.12″80°69°-2°
- TuesdayJun 9Showers42%0.07″89°70°+9°
- WednesdayJun 10Thunderstorm27%—90°74°+1°
Ozone at AQI 91 now. AQI up 17 in the last 6 hours — air quality is degrading. With UV 7.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 92 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 91 now. With UV 7.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 92 by mid-afternoon.
- Present
- AQI 91
- UV peak
- 7.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 92
PM × Wind × Precip
PM2.5 at 4.6 µg/m³, PM10 at 5.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.79
- 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
- 4:29 AM
- Moonset
- 1:56 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Roanoke at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 21 (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 — Roanoke
SPC has placed Roanoke 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.