Excessive Heat Warning — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 9:00 PM Excessive Heat Watch 7:00 PM

Clinton County, Illinois, United States

Last updated: 10:18 AM CDT  ·  Refresh
29°C
Feels like 36°
Mostly Cloudy
▲ 36°  /  ▼ 23°
Wind
4 mph S
Humidity
83%
Dew Point
26°
Pressure
29.45 inHg
Visibility
10 mi
UV Index
6.7
Cloud Cover
64%
Sunrise
5:54 AM
Sunset
8:13 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clinton County is currently mostly cloudy at 29°C. Precipitation is likely — peak probability 58% around 10 PM. Atmospheric instability is elevated (CAPE up to 4349 J/kg) — isolated convective development possible. Sunrise: 5:54AM · Sunset: 8:13PM.

Alerts

Excessive Heat Warning
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 9:00 PM
Excessive Heat Watch
Expires 7:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
4%
11 AM
31°
26%
12 PM
32°
29%
1 PM
34°
30%
2 PM
35°
28%
3 PM
36°
32%
4 PM
36°
43%
5 PM
36°
37%
6 PM
36°
37%
7 PM
34°
45%
8 PM
33°
45%
9 PM
29°
54%
10 PM
28°
58%
11 PM
27°
45%
12 AM
27°
19%
1 AM
26°
10%
2 AM
25°
11%
3 AM
24°
11%
4 AM
24°
9%
5 AM
24°
9%
6 AM
24°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
29°
3%
7-Day Forecast
Today
36° 23°
Partly Cloudy with a 58% chance of rain.
Mon
37° 24°
Clear with a 36% chance of rain.
Tue
33° 21°
Mostly Clear with a 25% chance of rain.
Wed
30° 18°
Clear.
Thu
31° 18°
Clear with a 29% chance of rain.
Fri
27° 19°
Drizzle, 64% chance.
Sat
30° 18°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Cloudy 4% 4 mph S 83%
11 AM 31° Mostly Cloudy 26% 6 mph SSW 79%
12 PM 32° Partly Cloudy 29% 7 mph SW 75%
1 PM 34° Partly Cloudy 30% 8 mph SW 70%
2 PM 35° Partly Cloudy 28% 8 mph SW 66%
3 PM 36° Partly Cloudy 32% 7 mph WSW 62%
4 PM 36° Partly Cloudy 43% 6 mph WSW 61%
5 PM 36° Mostly Clear 37% 4 mph WSW 63%
6 PM 36° Mostly Clear 37% 4 mph SW 66%
7 PM 34° Mostly Clear 45% 3 mph SSW 71%
8 PM 33° Mostly Clear 45% 6 mph WNW 77%
9 PM 29° Partly Cloudy 54% 10 mph NW 82%
10 PM 28° Mostly Cloudy 58% 9 mph NNW 84%
11 PM 27° Mostly Cloudy 45% 5 mph NNE 85%
12 AM 27° Mostly Cloudy 19% 4 mph E 86%
1 AM 26° Mostly Cloudy 10% 5 mph ESE 88%
2 AM 25° Partly Cloudy 11% 5 mph SE 89%
3 AM 24° Partly Cloudy 11% 6 mph SSE 91%
4 AM 24° Mostly Clear 9% 6 mph S 92%
5 AM 24° Partly Cloudy 9% 6 mph S 91%
6 AM 24° Partly Cloudy 3% 6 mph SSW 90%
7 AM 24° Partly Cloudy 3% 6 mph SSW 89%
8 AM 26° Mostly Clear 3% 6 mph SSW 85%
9 AM 29° Clear 3% 6 mph SSW 81%
15-Day Forecast
Today
7/26
Partly Cloudy
58%
23°
36°
Mon
7/27
Clear
36%
24°
37°
Tue
7/28
Mostly Clear
25%
21°
33°
Wed
7/29
Clear
7%
18°
30°
Thu
7/30
Clear
29%
18°
31°
Fri
7/31
Drizzle
64%
19°
27°
Sat
8/1
Clear
52%
18°
30°
Sun
8/2
Drizzle
43%
19°
30°
Mon
8/3
Drizzle
44%
19°
32°
Tue
8/4
Drizzle
51%
21°
33°
Wed
8/5
Drizzle
60%
21°
33°
Thu
8/6
Drizzle
60%
21°
32°
Fri
8/7
Drizzle
60%
20°
31°
Sat
8/8
Drizzle
60%
20°
32°
Sun
8/9
Drizzle
60%
21°
33°
54
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
54 AQI 10.6 µg/m³
O3
Ground-level ozone
50 AQI 54 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 54 Moderate 50 54
Tue 52 Moderate 42 52
Wed 48 Good 41 48
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 Sun Jul 26, 14:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4063 J/kg
MLCAPE3510 J/kg
MUCAPE4063 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-7.7
Kinematics
0–6 km Shear19 kt
0–1 km Shear10 kt
Eff. Shear26 kt
0–1 km SRH-27
0–3 km SRH-69
Eff. SRH-69
Storm Motion288° @ 19 kt
0–1 km EHI-0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.0
Thermo & Levels
PWAT1.98 in
0–3 km LR5.6 °C/km
700–500 LR6.2 °C/km
Total Totals49.7
LCL952 hPa
LFC997 hPa
EL144 hPa
Freezing Lvl16,732 ft