Marengo, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Marengo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Drizzle65%0.08″83°68°—
- SundayJul 5Overcast22%—80°63°-3°
- MondayJul 6Overcast——78°61°-2°
- TuesdayJul 7Overcast——81°56°+3°
- WednesdayJul 8Overcast15%—80°60°-1°
- ThursdayJul 9Drizzle47%0.06″76°65°-4°
- FridayJul 10Overcast41%—78°61°+2°
AQI 31 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 38 now. With UV 4.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 around 1 PM.
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 38 now. With UV 4.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 15 around 1 PM.
- Present
- AQI 38
- UV peak
- 4.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 5.2 µg/m³ (AQI 29) with a 0.73 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.73
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 10:52 PM
- Moonset
- 9:58 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Marengo at a glance
- Today vs. normal: 8°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: 60152
16-Day Forecast — Marengo
- Sat83°68°65%
- Sun80°63°22%
- Mon78°61°2%
- Tue81°56°1%
- Wed80°60°15%
- Thu76°65°47%
- Fri78°61°41%
- Sat82°60°12%
- Sun66°57°8%
- Mon72°54°8%
- Tue76°58°7%
- Wed78°62°26%
- Thu82°65°19%
- Fri83°67°26%
- Sat86°69°21%
- Sun84°69°32%
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 — Marengo
SPC includes Marengo 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 Marengo
- 60152