Karnak, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Karnak weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast12%—91°69°—
- SundayJul 5Rain26%0.55″87°71°-4°
- MondayJul 6Overcast40%—87°70°0°
- TuesdayJul 7Overcast16%—86°65°-1°
- WednesdayJul 8Clear18%—88°65°+2°
- ThursdayJul 9Overcast20%—93°67°+5°
- FridayJul 10Light Drizzle45%—92°76°-1°
AQI 56 (Moderate), driven by Ozone. AQI down 6 over the last 6 hours (gradual decline). Ozone at AQI 70 now. With UV 9.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 60 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 70 now. With UV 9.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 60 around 1 PM.
- Present
- AQI 70
- UV peak
- 9.1 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 60
PM × Wind × Precip
PM2.5 at 9.9 µg/m³, PM10 at 11.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- 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
- 10:47 PM
- Moonset
- 10:05 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Karnak at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: March 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62956
16-Day Forecast — Karnak
- Sat91°69°12%
- Sun87°71°26%
- Mon87°70°40%
- Tue86°65°16%
- Wed88°65°18%
- Thu93°67°20%
- Fri92°76°45%
- Sat88°70°32%
- Sun82°63°15%
- Mon82°59°11%
- Tue84°62°9%
- Wed85°61°9%
- Thu86°65°13%
- Fri90°68°13%
- Sat80°69°29%
- Sun78°68°19%
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 — Karnak
SPC has placed Karnak in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Karnak
- 62956