Cornell, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Cornell weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain63%1.1″85°71°—
- SundayJul 5Overcast22%—81°68°-4°
- MondayJul 6Clear——81°63°0°
- TuesdayJul 7Overcast——80°59°-1°
- WednesdayJul 8Overcast22%—81°63°+1°
- ThursdayJul 9Light Showers36%0.34″82°70°+1°
- FridayJul 10Overcast36%—78°64°-4°
AQI 33 (Good), driven by PM2.5. AQI down 9 over the last 6 hours (gradual decline). PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 4.5 µg/m³ (AQI 25) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:51 PM
- Moonset
- 10:00 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Cornell at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61319
16-Day Forecast — Cornell
- Sat85°71°63%
- Sun81°68°22%
- Mon81°63°5%
- Tue80°59°4%
- Wed81°63°22%
- Thu82°70°36%
- Fri78°64°36%
- Sat81°65°15%
- Sun70°59°7%
- Mon73°55°9%
- Tue77°59°12%
- Wed79°62°23%
- Thu82°64°16%
- Fri81°69°21%
- Sat85°69°26%
- Sun83°72°35%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Cornell
SPC has placed Cornell in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
ZIP codes in Cornell
- 61319