Irwin, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Irwin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain63%0.85″86°69°—
- SundayJul 5Foggy20%—81°68°-5°
- MondayJul 6Overcast——80°64°-1°
- TuesdayJul 7Overcast——81°61°+1°
- WednesdayJul 8Overcast——81°61°0°
- ThursdayJul 9Thunderstorm43%—82°68°+1°
- FridayJul 10Overcast41%—78°64°-4°
AQI 30 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 8.2 µg/m³ (AQI 46) with a 0.89 fine-to-coarse ratio and 5 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 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 39. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 39
- UV peak
- 3.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 8.2 µg/m³ (AQI 46) with a 0.89 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- 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
- 10:48 PM
- Moonset
- 9:57 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Irwin at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Irwin
- Sat86°69°63%
- Sun81°68°20%
- Mon80°64°5%
- Tue81°61°2%
- Wed81°61°5%
- Thu82°68°43%
- Fri78°64°41%
- Sat81°63°16%
- Sun70°60°8%
- Mon74°56°9%
- Tue77°59°10%
- Wed80°62°35%
- Thu83°65°24%
- Fri78°69°26%
- Sat85°69°19%
- Sun83°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 — Irwin
SPC has placed Irwin in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Irwin
- 60901