Heat Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, 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, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Fayette County, Illinois, United States

Last updated: 5:11 AM CDT  ·  Refresh
24°C
Feels like 27°
Partly Cloudy
▲ 34°  /  ▼ 23°
Wind
7 mph SSW
Humidity
86%
Dew Point
23°
Pressure
29.42 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
33%
Sunrise
6:06 AM
Sunset
7:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fayette County is currently partly cloudy at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3727 J/kg) — isolated convective development possible. Sunrise: 6:06AM · Sunset: 7:55PM.

Alerts

Heat Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, 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, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
8%
6 AM
24°
25%
7 AM
24°
23%
8 AM
26°
25%
9 AM
27°
25%
10 AM
29°
28%
11 AM
30°
33%
12 PM
31°
37%
1 PM
33°
24%
2 PM
33°
22%
3 PM
34°
23%
4 PM
34°
34%
5 PM
34°
39%
6 PM
33°
40%
7 PM
32°
41%
8 PM
31°
41%
9 PM
29°
42%
10 PM
28°
24%
11 PM
27°
24%
12 AM
26°
25%
1 AM
26°
23%
2 AM
26°
25%
3 AM
25°
16%
4 AM
24°
18%
7-Day Forecast
Today
34° 23°
Mostly Clear with a 41% chance of rain.
Wed
34° 23°
Partly Cloudy with a 67% chance of rain.
Thu
33° 23°
Partly Cloudy with a 56% chance of rain.
Fri
31° 22°
Partly Cloudy with a 64% chance of rain.
Sat
33° 22°
Mostly Clear.
Sun
34° 21°
Drizzle, 47% chance.
Mon
30° 20°
Drizzle, 47% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Partly Cloudy 8% 7 mph SSW 86%
6 AM 24° Partly Cloudy 25% 8 mph SSW 83%
7 AM 24° Partly Cloudy 23% 9 mph SSW 83%
8 AM 26° Mostly Clear 25% 10 mph SW 79%
9 AM 27° Mostly Clear 25% 10 mph SW 75%
10 AM 29° Mostly Clear 28% 11 mph SW 71%
11 AM 30° Partly Cloudy 33% 12 mph SW 67%
12 PM 31° Partly Cloudy 37% 12 mph SW 63%
1 PM 33° Mostly Clear 24% 13 mph SW 59%
2 PM 33° Partly Cloudy 22% 13 mph SW 57%
3 PM 34° Mostly Clear 23% 12 mph SW 55%
4 PM 34° Mostly Clear 34% 12 mph SW 55%
5 PM 34° Mostly Clear 39% 11 mph SW 59%
6 PM 33° Mostly Clear 40% 9 mph SSW 64%
7 PM 32° Mostly Clear 41% 7 mph SSW 68%
8 PM 31° Mostly Clear 41% 8 mph SSW 70%
9 PM 29° Mostly Clear 42% 8 mph SSW 70%
10 PM 28° Mostly Clear 24% 8 mph SSW 72%
11 PM 27° Mostly Clear 24% 7 mph SSW 75%
12 AM 26° Mostly Clear 25% 7 mph SSW 78%
1 AM 26° Clear 23% 7 mph SSW 80%
2 AM 26° Mostly Clear 25% 6 mph SSW 80%
3 AM 25° Mostly Clear 16% 6 mph SSW 80%
4 AM 24° Mostly Clear 18% 6 mph SSW 81%
15-Day Forecast
Today
8/11
Mostly Clear
41%
23°
34°
Wed
8/12
Partly Cloudy
67%
23°
34°
Thu
8/13
Partly Cloudy
56%
23°
33°
Fri
8/14
Partly Cloudy
64%
22°
31°
Sat
8/15
Mostly Clear
15%
22°
33°
Sun
8/16
Drizzle
47%
21°
34°
Mon
8/17
Drizzle
47%
20°
30°
Tue
8/18
Clear
34%
20°
32°
Wed
8/19
Mostly Clear
35%
22°
34°
Thu
8/20
Clear
35%
22°
34°
Fri
8/21
Drizzle
60%
19°
34°
Sat
8/22
Drizzle
60%
20°
32°
Sun
8/23
Clear
60%
19°
32°
Mon
8/24
Drizzle
60%
19°
31°
Tue
8/25
Drizzle
60%
18°
31°
48
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
48 AQI 8.6 µg/m³
O3
Ground-level ozone
41 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 41 48
Wed 39 Good 39 27
Thu 38 Good 38 26
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 Aug 11, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1962 J/kg
MLCAPE1941 J/kg
MUCAPE2651 J/kg
SBCIN-442 J/kg
MLCIN0 J/kg
Lifted Index-6.8
Kinematics
0–6 km Shear18 kt
0–1 km Shear18 kt
Eff. Shear9 kt
0–1 km SRH130
0–3 km SRH114
Eff. SRH-7
Storm Motion319° @ 18 kt
0–1 km EHI1.6
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.3
Thermo & Levels
PWAT1.58 in
0–3 km LR4.0 °C/km
700–500 LR8.0 °C/km
Total Totals52.5
LCL967 hPa
LFC673 hPa
EL174 hPa
Freezing Lvl14,541 ft