Clark County, Illinois, United States

Last updated: 12:41 AM CDT  ·  Refresh
26°C
Feels like 29°
Clear
▲ 37°  /  ▼ 23°
Wind
3 mph S
Humidity
73%
Dew Point
21°
Pressure
29.32 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:22 AM
Sunset
7:17 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clark County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2071 J/kg) — isolated convective development possible. Sunrise: 6:22AM · Sunset: 7:17PM.

Alerts

No active alerts for this location.
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
8%
1 AM
26°
8%
2 AM
25°
7%
3 AM
24°
3%
4 AM
24°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
24°
3%
8 AM
27°
3%
9 AM
31°
3%
10 AM
32°
3%
11 AM
33°
3%
12 PM
34°
3%
1 PM
36°
3%
2 PM
36°
3%
3 PM
36°
3%
4 PM
36°
6%
5 PM
37°
6%
6 PM
36°
7%
7 PM
33°
7%
8 PM
33°
7%
9 PM
29°
14%
10 PM
28°
15%
11 PM
28°
15%
7-Day Forecast
Today
37° 23°
Clear.
Sat
39° 22°
Mostly Clear with a 33% chance of rain.
Sun
32° 16°
Partly Cloudy.
Mon
31° 12°
Haze.
Tue
37° 17°
Clear.
Wed
39° 21°
Clear.
Thu
35° 18°
Partly Cloudy with a 49% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Clear 8% 3 mph S 73%
1 AM 26° Clear 8% 3 mph SSW 72%
2 AM 25° Clear 7% 4 mph SSW 74%
3 AM 24° Clear 3% 4 mph SW 76%
4 AM 24° Clear 3% 4 mph SW 77%
5 AM 22° Clear 3% 5 mph SW 79%
6 AM 22° Clear 3% 5 mph SW 81%
7 AM 24° Clear 3% 4 mph SW 78%
8 AM 27° Clear 3% 6 mph SW 71%
9 AM 31° Clear 3% 7 mph WSW 64%
10 AM 32° Clear 3% 7 mph WSW 59%
11 AM 33° Clear 3% 7 mph WSW 54%
12 PM 34° Clear 3% 7 mph WSW 49%
1 PM 36° Clear 3% 7 mph WSW 47%
2 PM 36° Clear 3% 7 mph WSW 46%
3 PM 36° Clear 3% 6 mph WSW 45%
4 PM 36° Clear 6% 6 mph WSW 48%
5 PM 37° Clear 6% 5 mph WSW 52%
6 PM 36° Clear 7% 4 mph SW 57%
7 PM 33° Clear 7% 4 mph SW 61%
8 PM 33° Clear 7% 4 mph SW 63%
9 PM 29° Clear 14% 5 mph SSW 65%
10 PM 28° Clear 15% 5 mph SW 67%
11 PM 28° Mostly Clear 15% 5 mph SW 68%
15-Day Forecast
Today
9/4
Clear
8%
23°
37°
Sat
9/5
Mostly Clear
33%
22°
39°
Sun
9/6
Partly Cloudy
9%
16°
32°
Mon
9/7
Haze
3%
12°
31°
Tue
9/8
Clear
3%
17°
37°
Wed
9/9
Clear
18%
21°
39°
Thu
9/10
Partly Cloudy
49%
18°
35°
Fri
9/11
Rain
53%
15°
33°
Sat
9/12
Drizzle
40%
17°
33°
Sun
9/13
Drizzle
45%
16°
34°
Mon
9/14
Drizzle
60%
19°
35°
Tue
9/15
Drizzle
60%
18°
33°
Wed
9/16
Drizzle
60%
18°
34°
Thu
9/17
Drizzle
60%
17°
33°
Fri
9/18
Drizzle
60%
17°
32°
53
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
53 AQI 10.5 µg/m³
O3
Ground-level ozone
44 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 44 53
Sat 53 Moderate 36 53
Sun 41 Good 38 41
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 Fri Sep 4, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE383 J/kg
MLCAPE277 J/kg
MUCAPE634 J/kg
SBCIN-440 J/kg
MLCIN-241 J/kg
Lifted Index-2.0
Kinematics
0–6 km Shear17 kt
0–1 km Shear7 kt
Eff. Shear18 kt
0–1 km SRH27
0–3 km SRH65
Eff. SRH62
Storm Motion347° @ 10 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.8
Thermo & Levels
PWAT1.40 in
0–3 km LR5.5 °C/km
700–500 LR5.6 °C/km
Total Totals45.2
LCL927 hPa
LFC572 hPa
EL264 hPa
Freezing Lvl16,076 ft