Calhoun, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Calhoun weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast27%—92°72°—
- SundayJul 5Drizzle27%0.03″81°71°-11°
- MondayJul 6Overcast27%—86°69°+5°
- TuesdayJul 7Overcast14%—83°67°-3°
- WednesdayJul 8Clear15%—85°65°+2°
- ThursdayJul 9Thunderstorm29%—88°70°+3°
- FridayJul 10Showers37%0.25″83°70°-5°
AQI 37 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 7.9 µg/m³, PM10 at 8.6 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 3.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 around 1 PM.
- Present
- AQI 35
- UV peak
- 3.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 17
PM × Wind × Precip
PM2.5 at 7.9 µg/m³, PM10 at 8.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 10:45 PM
- Moonset
- 10:00 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Calhoun at a glance
- Today vs. normal: 5°F above the seasonal normal for this latitude
- Last frost: April 8 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62419
16-Day Forecast — Calhoun
- Sat93°72°27%
- Sun81°71°27%
- Mon86°69°27%
- Tue83°67°14%
- Wed85°65°15%
- Thu88°70°29%
- Fri83°70°37%
- Sat86°72°28%
- Sun76°62°11%
- Mon72°57°5%
- Tue78°60°5%
- Wed81°63°19%
- Thu82°65°20%
- Fri79°70°16%
- Sat85°70°29%
- Sun84°72°29%
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 — Calhoun
SPC has placed Calhoun 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 Calhoun
- 62419