Centralia, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Centralia weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast17%—94°73°—
- SundayJul 5Heavy Rain22%0.66″84°72°-10°
- MondayJul 6Light Drizzle16%—87°70°+3°
- TuesdayJul 7Overcast——84°68°-3°
- WednesdayJul 8Overcast12%—87°67°+3°
- ThursdayJul 9Light Drizzle30%—91°72°+4°
- FridayJul 10Thunderstorm35%0.02″87°71°-4°
AQI 46 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 41 now. With UV 4.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 25 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 4.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 25 around 1 PM.
- Present
- AQI 41
- UV peak
- 4.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 25
PM × Wind × Precip
PM2.5 at 6.5 µg/m³, PM10 at 7.1 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
- 10:49 PM
- Moonset
- 10:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Centralia at a glance
- Today vs. normal: 15°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 code: 62801
16-Day Forecast — Centralia
- Sat94°73°17%
- Sun84°72°22%
- Mon87°70°16%
- Tue84°68°9%
- Wed87°67°12%
- Thu91°72°30%
- Fri87°71°35%
- Sat88°73°30%
- Sun76°61°13%
- Mon74°58°8%
- Tue78°60°10%
- Wed83°64°10%
- Thu81°66°16%
- Fri79°69°13%
- Sat85°69°23%
- Sun90°73°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 — Centralia
SPC has placed Centralia 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 Centralia
- 62801