Winthrop Harbor, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Winthrop Harbor weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Drizzle68%0.03″77°61°—
- SundayJul 5Overcast11%—70°63°-7°
- MondayJul 6Overcast——72°64°+2°
- TuesdayJul 7Overcast——73°62°+1°
- WednesdayJul 8Overcast27%—80°63°+7°
- ThursdayJul 9Light Drizzle31%0.03″75°65°-5°
- FridayJul 10Overcast23%—71°65°-4°
AQI 39 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~80%) — afternoon ozone should stay flat.
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 33. Overcast through the UV peak window (cloud cover ~80%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 2.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 6.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- 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
- 10:50 PM
- Moonset
- 9:54 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Winthrop Harbor at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60096
16-Day Forecast — Winthrop Harbor
- Sat79°62°68%
- Sun70°63°11%
- Mon72°64°5%
- Tue73°62°1%
- Wed80°63°27%
- Thu75°65°31%
- Fri71°65°23%
- Sat81°63°11%
- Sun67°61°12%
- Mon71°61°9%
- Tue74°65°11%
- Wed76°67°26%
- Thu79°68°16%
- Fri82°69°16%
- Sat80°70°20%
- Sun81°70°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 — Winthrop Harbor
SPC includes Winthrop Harbor in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Winthrop Harbor
- 60096