Millbrook, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Millbrook weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain81%2.2″82°70°—
- SundayJul 5Overcast18%—80°66°-2°
- MondayJul 6Overcast——81°63°+1°
- TuesdayJul 7Overcast——81°58°0°
- WednesdayJul 8Overcast10%—81°62°0°
- ThursdayJul 9Showers50%0.24″78°66°-3°
- FridayJul 10Overcast43%—81°63°+3°
AQI 30 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.8 µg/m³, PM10 at 7.4 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 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 31. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
- Present
- AQI 31
- UV peak
- 2.7 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 6.8 µg/m³, PM10 at 7.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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 the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:51 PM
- Moonset
- 9:58 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Millbrook at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60536
16-Day Forecast — Millbrook
- Sat82°70°81%
- Sun80°66°18%
- Mon81°63°3%
- Tue81°58°1%
- Wed81°62°10%
- Thu78°66°50%
- Fri81°63°43%
- Sat81°62°15%
- Sun68°59°7%
- Mon74°57°8%
- Tue78°59°8%
- Wed78°62°26%
- Thu82°65°21%
- Fri83°69°29%
- Sat85°70°23%
- Sun83°71°31%
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 — Millbrook
SPC has placed Millbrook in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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 Millbrook
- 60541
- 60536
- 60560