Marengo, Indiana Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Marengo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast24%—87°70°—
- SundayJul 5Overcast35%—85°72°-2°
- MondayJul 6Light Drizzle18%—80°69°-5°
- TuesdayJul 7Mostly Clear——84°66°+4°
- WednesdayJul 8Clear——85°64°+1°
- ThursdayJul 9Thunderstorm35%—87°69°+2°
- FridayJul 10T-storm w/ Hail53%0.01″87°70°0°
AQI 71 (Moderate), driven by PM2.5. AQI up 20 in the last 6 hours — air quality is degrading. PM2.5 at 6.9 µg/m³ (AQI 38) with a 0.96 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
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 38. Overcast through the UV peak window (cloud cover ~83%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 6.9 µg/m³ (AQI 38) with a 0.96 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.96
- 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
- 12:01 AM
- Moonset
- 11:58 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Marengo at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 47140
16-Day Forecast — Marengo
- Sat87°70°24%
- Sun85°71°35%
- Mon80°69°18%
- Tue84°66°7%
- Wed85°64°5%
- Thu87°69°35%
- Fri87°70°53%
- Sat83°68°41%
- Sun77°64°20%
- Mon82°58°13%
- Tue84°61°8%
- Wed88°67°23%
- Thu85°66°19%
- Fri81°65°32%
- Sat92°72°26%
- Sun92°76°26%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 has placed Marengo in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Marengo
- 47140