Clark County, Illinois, United States

Last updated: 12:04 AM 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
6:19 AM
Sunset
7:21 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 1972 J/kg) — isolated convective development possible. Sunrise: 6:19AM · Sunset: 7:21PM.

Alerts

No active alerts for this location.
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
3%
1 AM
25°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
21°
3%
6 AM
21°
3%
7 AM
22°
3%
8 AM
24°
3%
9 AM
28°
3%
10 AM
30°
3%
11 AM
32°
3%
12 PM
33°
3%
1 PM
36°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
36°
3%
7 PM
33°
3%
8 PM
33°
3%
9 PM
30°
3%
10 PM
29°
3%
11 PM
27°
3%
7-Day Forecast
Today
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%
1 AM 25° Clear 3% 7 mph SSW 70%
2 AM 24° Clear 3% 7 mph SSW 74%
3 AM 23° Clear 3% 7 mph SW 78%
4 AM 23° Clear 3% 7 mph SSW 81%
5 AM 21° Clear 3% 7 mph SW 82%
6 AM 21° Mostly Clear 3% 7 mph SW 83%
7 AM 22° Mostly Clear 3% 8 mph SW 82%
8 AM 24° Mostly Clear 3% 9 mph SW 75%
9 AM 28° Clear 3% 10 mph SW 65%
10 AM 30° Clear 3% 10 mph WSW 58%
11 AM 32° Clear 3% 10 mph WSW 54%
12 PM 33° Clear 3% 10 mph WSW 50%
1 PM 36° Clear 3% 9 mph WSW 46%
2 PM 37° Clear 3% 8 mph WSW 45%
3 PM 37° Clear 3% 7 mph SW 44%
4 PM 37° Clear 3% 7 mph SW 43%
5 PM 37° Clear 3% 6 mph SW 47%
6 PM 36° Clear 3% 6 mph SW 52%
7 PM 33° Clear 3% 6 mph SSW 56%
8 PM 33° Clear 3% 6 mph SSW 58%
9 PM 30° Clear 3% 7 mph SSW 61%
10 PM 29° Clear 3% 7 mph SSW 63%
11 PM 27° Clear 3% 7 mph SSW 65%
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
SBCAPE16 J/kg
MLCAPE30 J/kg
MUCAPE54 J/kg
SBCIN-895 J/kg
MLCIN0 J/kg
Lifted Index-0.2
Kinematics
0–6 km Shear14 kt
0–1 km Shear9 kt
Eff. Shear—
0–1 km SRH18
0–3 km SRH29
Eff. SRH—
Storm Motion11° @ 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
LFC550 hPa
EL495 hPa
Freezing Lvl15,771 ft