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

Clark County, Illinois, United States

Last updated: 11:43 PM CDT  ·  Refresh
25°C
Feels like 26°
Clear
▲ 33°  /  ▼ 21°
Wind
7 mph SSW
Humidity
73%
Dew Point
20°
Pressure
29.36 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:18 AM
Sunset
7:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clark County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1969 J/kg) — isolated convective development possible. Sunrise: 6:18AM · Sunset: 7:23PM.

Alerts

Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL
Expires 7:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
3%
12 AM
24°
3%
1 AM
24°
3%
2 AM
23°
3%
3 AM
23°
3%
4 AM
22°
3%
5 AM
21°
3%
6 AM
21°
3%
7 AM
23°
3%
8 AM
26°
3%
9 AM
29°
3%
10 AM
31°
3%
11 AM
33°
3%
12 PM
34°
3%
1 PM
36°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
36°
3%
5 PM
36°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
32°
3%
9 PM
29°
3%
10 PM
29°
3%
7-Day Forecast
Tonight
33° 21°
Clear.
Tue
37° 21°
Clear.
Wed
39° 22°
Clear.
Thu
39° 22°
Partly Cloudy with a 55% chance of rain.
Fri
39° 22°
Clear with a 57% chance of rain.
Sat
39° 23°
Clear.
Sun
37° 20°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 3% 7 mph SSW 73%
12 AM 24° Clear 3% 8 mph SSW 70%
1 AM 24° Clear 3% 7 mph SSW 74%
2 AM 23° Clear 3% 7 mph SSW 77%
3 AM 23° Clear 3% 7 mph SSW 80%
4 AM 22° Clear 3% 7 mph SW 82%
5 AM 21° Mostly Clear 3% 7 mph SW 83%
6 AM 21° Mostly Clear 3% 8 mph SW 83%
7 AM 23° Mostly Clear 3% 9 mph SW 77%
8 AM 26° Clear 3% 10 mph SW 68%
9 AM 29° Clear 3% 10 mph WSW 61%
10 AM 31° Clear 3% 10 mph WSW 55%
11 AM 33° Clear 3% 10 mph WSW 51%
12 PM 34° Clear 3% 9 mph WSW 47%
1 PM 36° Clear 3% 8 mph WSW 46%
2 PM 37° Clear 3% 7 mph SW 44%
3 PM 37° Clear 3% 7 mph SW 43%
4 PM 36° Clear 3% 7 mph SW 46%
5 PM 36° Clear 3% 6 mph SW 51%
6 PM 34° Clear 3% 6 mph SSW 55%
7 PM 33° Clear 3% 6 mph SSW 58%
8 PM 32° Clear 3% 6 mph SSW 60%
9 PM 29° Clear 3% 7 mph SSW 63%
10 PM 29° Clear 3% 7 mph SSW 64%
15-Day Forecast
Today
8/31
Clear
3%
21°
33°
Tue
9/1
Clear
3%
21°
37°
Wed
9/2
Clear
7%
22°
39°
Thu
9/3
Partly Cloudy
55%
22°
39°
Fri
9/4
Clear
57%
22°
39°
Sat
9/5
Clear
19%
23°
39°
Sun
9/6
Clear
19%
20°
37°
Mon
9/7
Clear
19%
16°
36°
Tue
9/8
Clear
60%
19°
38°
Wed
9/9
Drizzle
60%
19°
38°
Thu
9/10
Drizzle
60%
17°
37°
Fri
9/11
Drizzle
60%
19°
35°
Sat
9/12
Drizzle
60%
17°
33°
Sun
9/13
Drizzle
60%
17°
31°
Mon
9/14
Drizzle
60%
17°
32°
55
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
55 AQI 11.0 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 44 55
Wed 53 Moderate 44 53
Thu 53 Moderate 42 53
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 Tue Sep 1, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE24 J/kg
MLCAPE30 J/kg
MUCAPE54 J/kg
SBCIN-876 J/kg
MLCIN0 J/kg
Lifted Index-0.4
Kinematics
0–6 km Shear14 kt
0–1 km Shear9 kt
Eff. Shear—
0–1 km SRH20
0–3 km SRH31
Eff. SRH—
Storm Motion12° @ 12 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index19.0
Thermo & Levels
PWAT1.23 in
0–3 km LR3.5 °C/km
700–500 LR7.5 °C/km
Total Totals45.6
LCL922 hPa
LFC553 hPa
EL313 hPa
Freezing Lvl15,771 ft