Shannon, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Shannon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle39%0.03″81°68°—
- SundayJul 5Overcast29%—83°66°+2°
- MondayJul 6Mostly Clear——80°59°-3°
- TuesdayJul 7Overcast——80°58°0°
- WednesdayJul 8Overcast25%—80°60°0°
- ThursdayJul 9Showers30%0.31″77°68°-3°
- FridayJul 10Overcast24%—78°62°+1°
AQI 20 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 4.7 µg/m³, PM10 at 5.8 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 7 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 4.7 µg/m³, PM10 at 5.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.81
- Wind
- light
- Recent rain
- 1h 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
- 10:56 PM
- Moonset
- 10:03 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Shannon at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 29 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61078
16-Day Forecast — Shannon
- Sat81°68°39%
- Sun83°66°29%
- Mon80°59°2%
- Tue80°58°3%
- Wed80°60°25%
- Thu77°68°30%
- Fri78°62°24%
- Sat80°63°13%
- Sun67°57°7%
- Mon73°55°10%
- Tue75°59°13%
- Wed78°63°26%
- Thu81°65°13%
- Fri82°67°26%
- Sat83°69°26%
- 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 — Shannon
SPC includes Shannon 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 Shannon
- 61078