Caseyville, Illinois Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Caseyville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——80°58°—
- TuesdayJun 16Overcast20%—82°60°+2°
- WednesdayJun 17Thunderstorm81%—90°63°+8°
- ThursdayJun 18Light Showers81%—76°63°-14°
- FridayJun 19Overcast14%—78°59°+2°
- SaturdayJun 20Light Drizzle18%—82°60°+4°
- SundayJun 21Showers42%1.3″74°65°-8°
AQI 31 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 7.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 around 1 PM.
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 43 now. With UV 7.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 around 1 PM.
- Present
- AQI 43
- UV peak
- 7.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5 at 5.4 µg/m³ (AQI 30) with a 0.93 fine-to-coarse ratio and 5 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:39 AM
- Moonset
- 8:41 PM
- In sign
- ♋︎ Cancer
Sun climbs to its northern throne
Caseyville at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: April 8 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Caseyville
- Mon80°58°0%
- Tue82°60°20%
- Wed90°63°81%
- Thu76°63°81%
- Fri78°59°14%
- Sat82°60°18%
- Sun74°65°42%
- Mon75°62°55%
- Tue71°59°21%
- Wed78°57°14%
- Thu86°64°10%
- Fri92°73°25%
- Sat95°75°33%
- Sun96°74°27%
- Mon87°72°18%
- Tue88°69°32%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 — Caseyville
SPC has placed Caseyville in the Enhanced Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3ENHEnhanced Risk
Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.
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 Caseyville
- 62232