Grant Park, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Grant Park weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Showers71%2.5″83°70°—
- SundayJul 5Foggy15%—78°67°-5°
- MondayJul 6Overcast——80°64°+2°
- TuesdayJul 7Overcast——81°62°+1°
- WednesdayJul 8Overcast——81°62°0°
- ThursdayJul 9Thunderstorm47%0.09″81°68°0°
- FridayJul 10Overcast41%—80°63°-1°
AQI 30 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 7.5 µg/m³, PM10 at 8.2 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 37. Overcast through the UV peak window (cloud cover ~68%) — afternoon ozone should stay flat.
- Present
- AQI 37
- UV peak
- 3.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 7.5 µg/m³, PM10 at 8.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- Wind
- light
- Recent rain
- 1h 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:47 PM
- Moonset
- 9:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Grant Park at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 23 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60940
16-Day Forecast — Grant Park
- Sat83°70°71%
- Sun78°67°15%
- Mon80°64°3%
- Tue81°62°2%
- Wed81°62°4%
- Thu81°68°47%
- Fri80°63°41%
- Sat81°62°14%
- Sun70°60°8%
- Mon74°60°8%
- Tue77°62°8%
- Wed80°62°23%
- Thu83°66°24%
- Fri76°69°24%
- Sat85°69°17%
- Sun84°71°29%
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 — Grant Park
SPC has placed Grant Park in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Grant Park
- 60940