Holcomb, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Holcomb weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle63%0.01″82°67°—
- SundayJul 5Foggy22%—81°65°-1°
- MondayJul 6Overcast——79°61°-2°
- TuesdayJul 7Overcast——80°56°+1°
- WednesdayJul 8Overcast21%—81°61°+1°
- ThursdayJul 9Heavy Drizzle31%0.14″75°64°-6°
- FridayJul 10Overcast30%—79°62°+4°
AQI 22 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 5.1 µg/m³ (AQI 28) with a 0.88 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 during the projected peak around 7 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 5.1 µg/m³ (AQI 28) with a 0.88 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.88
- 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
- 10:54 PM
- Moonset
- 10:00 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Holcomb at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 28 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61043
16-Day Forecast — Holcomb
- Sat82°67°63%
- Sun81°65°22%
- Mon79°61°2%
- Tue80°56°2%
- Wed81°61°21%
- Thu75°64°31%
- Fri79°62°30%
- Sat82°61°14%
- Sun66°57°9%
- Mon74°54°14%
- Tue74°58°13%
- Wed78°61°26%
- Thu81°65°13%
- Fri82°67°26%
- Sat85°69°26%
- Sun82°71°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 — Holcomb
SPC includes Holcomb 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 Holcomb
- 61043
- 61020