Deer Park, Illinois Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Deer Park weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 2Mostly Clear——73°52°—
- WednesdayJun 3Overcast——83°52°+10°
- ThursdayJun 4Overcast——82°61°-1°
- FridayJun 5Light Drizzle45%—82°67°0°
- SaturdayJun 6Light Showers58%0.08″80°66°-2°
- SundayJun 7Mostly Clear26%—77°59°-3°
- MondayJun 8Overcast12%—79°59°+2°
Ozone at AQI 66 — peak already passed at 1 PM under clear skies. AQI up 10 over the last 6 hours (gradual rise). 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 66 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 66
- UV peak
- 3.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 66
PM × Wind × Precip
PM2.5 at 6.1 µg/m³, PM10 at 6.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- 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).
If bees stay at home, rain will soon come; if they fly away, fine will be the day.
- Moonrise
- 3:09 AM
- Moonset
- 11:42 AM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Deer Park at a glance
- Today vs. normal: 73°F — typical for the season
- Last frost: April 29 (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.