Belleville, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Belleville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—96°76°—
- SundayJul 5Light Drizzle20%0.02″83°73°-13°
- MondayJul 6Overcast21%—87°70°+4°
- TuesdayJul 7Overcast12%—85°67°-2°
- WednesdayJul 8Overcast15%—91°67°+6°
- ThursdayJul 9Light Drizzle30%—96°71°+5°
- FridayJul 10Thunderstorm30%0.01″90°73°-6°
AQI 37 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.6 µg/m³ (AQI 42) with a 0.93 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 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 32 now. With UV 3.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 14 around 1 PM.
- Present
- AQI 32
- UV peak
- 3.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 14
PM × Wind × Precip
PM2.5 at 7.6 µg/m³ (AQI 42) with a 0.93 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- 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
- 10:52 PM
- Moonset
- 10:07 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Belleville at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 62220, 62221, 62223, 62226
16-Day Forecast — Belleville
- Sat96°76°20%
- Sun83°73°20%
- Mon87°70°21%
- Tue85°67°12%
- Wed91°67°15%
- Thu96°71°30%
- Fri90°73°30%
- Sat89°73°19%
- Sun79°64°11%
- Mon78°59°2%
- Tue79°61°6%
- Wed83°64°12%
- Thu82°66°14%
- Fri82°69°10%
- Sat86°70°13%
- Sun90°72°16%
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 — Belleville
SPC has placed Belleville 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 Belleville
- 62221
- 62220
- 62226
- 62223