Winnetka, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Winnetka weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Rain83%0.29″79°66°—
- SundayJul 5Foggy13%—71°62°-8°
- MondayJul 6Overcast——73°65°+2°
- TuesdayJul 7Overcast——73°65°0°
- WednesdayJul 8Overcast26%—85°66°+12°
- ThursdayJul 9Thunderstorm35%0.04″78°66°-7°
- FridayJul 10Overcast35%—73°66°-5°
AQI 52 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.4 µg/m³, PM10 at 8.6 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 30. Overcast through the UV peak window (cloud cover ~96%) — afternoon ozone should stay flat.
- Present
- AQI 30
- UV peak
- 1.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 8.4 µg/m³, PM10 at 8.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.98
- 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
- 10:49 PM
- Moonset
- 9:54 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Winnetka at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 29 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60093
16-Day Forecast — Winnetka
- Sat79°66°83%
- Sun71°62°13%
- Mon73°65°6%
- Tue73°65°2%
- Wed85°66°26%
- Thu78°66°35%
- Fri73°66°35%
- Sat83°66°18%
- Sun69°63°12%
- Mon73°61°13%
- Tue75°66°9%
- Wed84°67°23%
- Thu83°70°16%
- Fri88°73°19%
- Sat83°73°19%
- Sun88°72°28%
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 — Winnetka
SPC has placed Winnetka 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 Winnetka
- 60093