Casey, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Casey weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast13%—84°69°—
- MondayJul 6Overcast14%—82°69°-2°
- TuesdayJul 7Overcast10%—80°67°-2°
- WednesdayJul 8Overcast12%—83°64°+3°
- ThursdayJul 9Thunderstorm46%0.32″85°69°+2°
- FridayJul 10Light Showers46%0.01″86°72°+1°
- SaturdayJul 11Thunderstorm21%0.02″79°70°-7°
AQI 36 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.2 µg/m³ (AQI 40) with a 0.87 fine-to-coarse ratio and 3 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.
What's driving it
Ozone × UV × Sky
Ozone at AQI 36 now. With UV 4.6 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 16 around 1 PM.
- Present
- AQI 36
- UV peak
- 4.6 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 7.2 µg/m³ (AQI 40) with a 0.87 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.87
- Wind
- calm
- 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
- 11:09 PM
- Moonset
- 11:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Casey at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62420
16-Day Forecast — Casey
- Sun84°69°13%
- Mon82°69°14%
- Tue80°67°10%
- Wed83°64°12%
- Thu85°69°46%
- Fri86°72°46%
- Sat79°70°21%
- Sun86°68°21%
- Mon88°71°6%
- Tue91°74°6%
- Wed79°61°7%
- Thu79°57°23%
- Fri81°62°19%
- Sat87°65°33%
- Sun86°71°39%
- Mon88°73°32%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Casey
SPC includes Casey 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 Casey
- 62420