Harmon, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Harmon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Drizzle58%0.03″83°68°—
- SundayJul 5Foggy25%—82°67°-1°
- MondayJul 6Clear——81°61°-1°
- TuesdayJul 7Overcast——79°57°-2°
- WednesdayJul 8Overcast22%—81°62°+2°
- ThursdayJul 9Drizzle29%0.04″76°68°-5°
- FridayJul 10Overcast29%—80°63°+4°
AQI 22 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 5.3 µg/m³ (AQI 29) with a 0.91 fine-to-coarse ratio and 4 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 during the projected peak around 7 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 5.3 µg/m³ (AQI 29) with a 0.91 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- Wind
- calm
- 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
- 10:55 PM
- Moonset
- 10:02 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Harmon at a glance
- Today vs. normal: 72°F — typical for the season
- 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: 61042
16-Day Forecast — Harmon
- Sat83°68°58%
- Sun82°67°25%
- Mon81°61°2%
- Tue79°57°3%
- Wed81°62°22%
- Thu76°68°29%
- Fri80°63°29%
- Sat82°64°14%
- Sun68°58°7%
- Mon74°55°10%
- Tue74°59°12%
- Wed79°62°29%
- Thu82°66°18%
- Fri82°68°29%
- Sat84°70°23%
- Sun84°72°39%
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 — Harmon
SPC includes Harmon 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 Harmon
- 61042