Granville, Illinois Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Granville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——83°57°—
- FridayJun 5Showers39%0.41″78°67°-5°
- SaturdayJun 6Light Showers72%—84°68°+6°
- SundayJun 7Showers29%—81°69°-3°
- MondayJun 8Showers67%0.06″79°68°-2°
- TuesdayJun 9Showers42%0.01″87°68°+8°
- WednesdayJun 10Thunderstorm24%—89°73°+2°
Ozone at AQI 96 — peak already passed at 1 PM under clear 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 clear skies. Levels should ease through evening.
- Present
- AQI 96
- UV peak
- 5.7 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 96
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
- 4:30 AM
- Moonset
- 1:55 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Granville at a glance
- Today vs. normal: 9°F above 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 — Granville
SPC has placed Granville 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.