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

Fayette County, Illinois, United States

Last updated: 8:56 AM CDT  ·  Refresh
25°C
Feels like 29°
Fog
▲ 33°  /  ▼ 22°
Wind
5 mph SSE
Humidity
94%
Dew Point
24°
Pressure
29.38 inHg
Visibility
0 mi
UV Index
4.6
Cloud Cover
76%
Sunrise
5:51 AM
Sunset
8:13 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fayette County is currently fog at 25°C. Precipitation is likely — peak probability 61% around 2 PM. Atmospheric instability is elevated (CAPE up to 4431 J/kg) — isolated convective development possible. Sunrise: 5:51AM · 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
25°
21%
9 AM
27°
27%
10 AM
29°
50%
11 AM
29°
51%
12 PM
31°
36%
1 PM
32°
51%
2 PM
33°
61%
3 PM
33°
57%
4 PM
32°
57%
5 PM
32°
57%
6 PM
31°
47%
7 PM
29°
44%
8 PM
29°
36%
9 PM
27°
33%
10 PM
26°
14%
11 PM
25°
14%
12 AM
24°
9%
1 AM
23°
9%
2 AM
23°
9%
3 AM
23°
5%
4 AM
23°
5%
5 AM
22°
5%
6 AM
22°
5%
7 AM
23°
5%
7-Day Forecast
Today
33° 22°
Mostly Cloudy with a 61% chance of rain.
Mon
34° 22°
Partly Cloudy with a 36% chance of rain.
Tue
33° 19°
Partly Cloudy.
Wed
29° 17°
Clear.
Thu
30° 17°
Clear.
Fri
27° 18°
Drizzle, 59% chance.
Sat
29° 18°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Fog 21% 5 mph SSE 94%
9 AM 27° Mostly Cloudy 27% 6 mph SSE 93%
10 AM 29° Rain 50% 6 mph SSE 88%
11 AM 29° Mostly Cloudy 51% 6 mph SSW 82%
12 PM 31° Partly Cloudy 36% 7 mph SSW 77%
1 PM 32° Partly Cloudy 51% 7 mph SSW 74%
2 PM 33° Partly Cloudy 61% 7 mph SW 73%
3 PM 33° Mostly Cloudy 57% 8 mph SW 71%
4 PM 32° Partly Cloudy 57% 6 mph WSW 73%
5 PM 32° Mostly Cloudy 57% 6 mph SW 77%
6 PM 31° Overcast 47% 7 mph SW 81%
7 PM 29° Mostly Cloudy 44% 7 mph SW 80%
8 PM 29° Mostly Cloudy 36% 8 mph SW 79%
9 PM 27° Partly Cloudy 33% 10 mph SW 77%
10 PM 26° Partly Cloudy 14% 7 mph SSW 81%
11 PM 25° Partly Cloudy 14% 6 mph S 86%
12 AM 24° Partly Cloudy 9% 8 mph SE 90%
1 AM 23° Partly Cloudy 9% 7 mph SE 91%
2 AM 23° Mostly Cloudy 9% 6 mph SE 92%
3 AM 23° Mostly Cloudy 5% 5 mph SE 92%
4 AM 23° Mostly Cloudy 5% 5 mph SE 91%
5 AM 22° Mostly Cloudy 5% 5 mph SSE 90%
6 AM 22° Mostly Cloudy 5% 6 mph SSE 89%
7 AM 23° Partly Cloudy 5% 5 mph SSE 87%
15-Day Forecast
Today
7/26
Mostly Cloudy
61%
22°
33°
Mon
7/27
Partly Cloudy
36%
22°
34°
Tue
7/28
Partly Cloudy
14%
19°
33°
Wed
7/29
Clear
7%
17°
29°
Thu
7/30
Clear
16%
17°
30°
Fri
7/31
Drizzle
59%
18°
27°
Sat
8/1
Drizzle
52%
18°
29°
Sun
8/2
Drizzle
43%
18°
30°
Mon
8/3
Drizzle
44%
19°
31°
Tue
8/4
Drizzle
51%
21°
33°
Wed
8/5
Drizzle
60%
20°
32°
Thu
8/6
Drizzle
60%
19°
31°
Fri
8/7
Drizzle
60%
19°
31°
Sat
8/8
Drizzle
60%
19°
31°
Sun
8/9
Drizzle
60%
20°
32°
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 10.7 µg/m³
O3
Ground-level ozone
43 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 54 Moderate 43 54
Tue 49 Good 42 49
Wed 48 Good 44 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, 11:00'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
SBCAPE1703 J/kg
MLCAPE2296 J/kg
MUCAPE2836 J/kg
SBCIN-163 J/kg
MLCIN0 J/kg
Lifted Index-3.0
Kinematics
0–6 km Shear24 kt
0–1 km Shear18 kt
Eff. Shear28 kt
0–1 km SRH-29
0–3 km SRH-49
Eff. SRH-49
Storm Motion300° @ 24 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.0
Thermo & Levels
PWAT1.85 in
0–3 km LR4.3 °C/km
700–500 LR5.8 °C/km
Total Totals47.1
LCL980 hPa
LFC704 hPa
EL180 hPa
Freezing Lvl16,601 ft