Extreme Heat Warning — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM Heat Advisory — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM

Stark County, Illinois, United States

Last updated: 1:53 AM CDT  ·  Refresh
24°C
Feels like 27°
Clear
▲ 34°  /  ▼ 24°
Wind
5 mph S
Humidity
73%
Dew Point
21°
Pressure
29.18 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:27 AM
Sunset
7:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Stark County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3285 J/kg) — isolated convective development possible. Sunrise: 6:27AM · Sunset: 7:28PM.

Alerts

Extreme Heat Warning
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
58 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
10%
2 AM
25°
10%
3 AM
24°
4%
4 AM
24°
4%
5 AM
23°
4%
6 AM
23°
4%
7 AM
24°
4%
8 AM
27°
9%
9 AM
28°
9%
10 AM
30°
7%
11 AM
31°
8%
12 PM
32°
8%
1 PM
34°
8%
2 PM
34°
8%
3 PM
34°
8%
4 PM
33°
8%
5 PM
34°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
9%
9 PM
27°
9%
10 PM
27°
11%
11 PM
27°
12%
12 AM
26°
12%
7-Day Forecast
Today
34° 24°
Clear.
Fri
36° 24°
Mostly Clear with a 28% chance of rain.
Sat
34° 21°
Clear with a 36% chance of rain.
Sun
28° 18°
Fog with a 24% chance of rain.
Mon
29° 15°
Clear.
Tue
32° 18°
Drizzle, 43% chance.
Wed
35° 21°
Rain, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Clear 10% 5 mph S 73%
2 AM 25° Clear 10% 6 mph SSW 69%
3 AM 24° Clear 4% 6 mph SSW 71%
4 AM 24° Clear 4% 6 mph SSW 73%
5 AM 23° Clear 4% 6 mph S 76%
6 AM 23° Clear 4% 6 mph S 78%
7 AM 24° Clear 4% 7 mph SSW 77%
8 AM 27° Clear 9% 8 mph SW 72%
9 AM 28° Clear 9% 10 mph SW 68%
10 AM 30° Clear 7% 9 mph SW 64%
11 AM 31° Clear 8% 9 mph SW 61%
12 PM 32° Clear 8% 9 mph WSW 58%
1 PM 34° Mostly Clear 8% 8 mph WSW 57%
2 PM 34° Mostly Clear 8% 6 mph SW 57%
3 PM 34° Mostly Clear 8% 7 mph SSW 57%
4 PM 33° Mostly Clear 8% 6 mph SSW 61%
5 PM 34° Mostly Clear 3% 5 mph S 66%
6 PM 33° Clear 3% 6 mph S 71%
7 PM 32° Clear 3% 6 mph S 71%
8 PM 31° Clear 9% 6 mph S 72%
9 PM 27° Clear 9% 6 mph S 71%
10 PM 27° Clear 11% 6 mph S 71%
11 PM 27° Clear 12% 6 mph S 71%
12 AM 26° Clear 12% 7 mph SSW 71%
15-Day Forecast
Today
9/3
Clear
10%
24°
34°
Fri
9/4
Mostly Clear
28%
24°
36°
Sat
9/5
Clear
36%
21°
34°
Sun
9/6
Fog
24%
18°
28°
Mon
9/7
Clear
16%
15°
29°
Tue
9/8
Drizzle
43%
18°
32°
Wed
9/9
Rain
52%
21°
35°
Thu
9/10
Drizzle
53%
19°
33°
Fri
9/11
Drizzle
68%
19°
34°
Sat
9/12
Drizzle
51%
19°
34°
Sun
9/13
Drizzle
60%
18°
29°
Mon
9/14
Drizzle
60%
18°
29°
Tue
9/15
Drizzle
60%
17°
28°
Wed
9/16
Drizzle
60%
16°
27°
Thu
9/17
Drizzle
60%
16°
26°
58
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
58 AQI 12.7 µg/m³
O3
Ground-level ozone
38 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 58 Moderate 38 58
Fri 45 Good 35 45
Sat 45 Good 40 45
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Sep 3, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE397 J/kg
MLCAPE108 J/kg
MUCAPE666 J/kg
SBCIN-468 J/kg
MLCIN-264 J/kg
Lifted Index-1.4
Kinematics
0–6 km Shear24 kt
0–1 km Shear18 kt
Eff. Shear22 kt
0–1 km SRH109
0–3 km SRH76
Eff. SRH26
Storm Motion317° @ 17 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.2
K-Index27.1
Thermo & Levels
PWAT1.30 in
0–3 km LR5.0 °C/km
700–500 LR5.8 °C/km
Total Totals44.3
LCL936 hPa
LFC677 hPa
EL245 hPa
Freezing Lvl15,331 ft