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

Montgomery County, Illinois, United States

Last updated: 5:11 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Clear
▲ 34°  /  ▼ 23°
Wind
7 mph SSW
Humidity
85%
Dew Point
23°
Pressure
29.30 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
27%
Sunrise
6:07 AM
Sunset
7:58 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3983 J/kg) — isolated convective development possible. Sunrise: 6:07AM · Sunset: 7:58PM.

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
50 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
7%
6 AM
24°
23%
7 AM
24°
23%
8 AM
26°
23%
9 AM
27°
23%
10 AM
28°
23%
11 AM
29°
23%
12 PM
31°
35%
1 PM
33°
11%
2 PM
33°
20%
3 PM
34°
21%
4 PM
34°
36%
5 PM
34°
39%
6 PM
33°
40%
7 PM
32°
36%
8 PM
30°
37%
9 PM
28°
38%
10 PM
28°
29%
11 PM
27°
22%
12 AM
25°
23%
1 AM
25°
8%
2 AM
25°
10%
3 AM
24°
11%
4 AM
24°
11%
7-Day Forecast
Today
34° 23°
Partly Cloudy with a 39% chance of rain.
Wed
33° 23°
Partly Cloudy with a 63% chance of rain.
Thu
32° 22°
Partly Cloudy with a 59% chance of rain.
Fri
29° 22°
Mostly Cloudy with a 60% chance of rain.
Sat
32° 21°
Partly Cloudy.
Sun
32° 21°
Drizzle, 63% chance.
Mon
28° 19°
Mostly Clear with a 47% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 7% 7 mph SSW 85%
6 AM 24° Partly Cloudy 23% 8 mph SSW 82%
7 AM 24° Partly Cloudy 23% 8 mph SW 82%
8 AM 26° Partly Cloudy 23% 9 mph SW 78%
9 AM 27° Partly Cloudy 23% 10 mph SW 74%
10 AM 28° Partly Cloudy 23% 11 mph SW 71%
11 AM 29° Partly Cloudy 23% 11 mph WSW 68%
12 PM 31° Mostly Cloudy 35% 12 mph WSW 63%
1 PM 33° Partly Cloudy 11% 13 mph SW 59%
2 PM 33° Partly Cloudy 20% 12 mph SW 57%
3 PM 34° Mostly Clear 21% 12 mph SW 56%
4 PM 34° Mostly Clear 36% 11 mph SW 55%
5 PM 34° Mostly Clear 39% 10 mph SW 59%
6 PM 33° Mostly Clear 40% 8 mph SW 64%
7 PM 32° Partly Cloudy 36% 7 mph SSW 69%
8 PM 30° Mostly Clear 37% 6 mph SSW 71%
9 PM 28° Clear 38% 6 mph SSW 73%
10 PM 28° Clear 29% 6 mph SW 74%
11 PM 27° Clear 22% 6 mph SSW 75%
12 AM 25° Clear 23% 6 mph SSW 75%
1 AM 25° Clear 8% 7 mph SSW 76%
2 AM 25° Clear 10% 6 mph SSW 78%
3 AM 24° Mostly Clear 11% 6 mph SSW 80%
4 AM 24° Partly Cloudy 11% 6 mph SSW 81%
15-Day Forecast
Today
8/11
Partly Cloudy
39%
23°
34°
Wed
8/12
Partly Cloudy
63%
23°
33°
Thu
8/13
Partly Cloudy
59%
22°
32°
Fri
8/14
Mostly Cloudy
60%
22°
29°
Sat
8/15
Partly Cloudy
15%
21°
32°
Sun
8/16
Drizzle
63%
21°
32°
Mon
8/17
Mostly Clear
47%
19°
28°
Tue
8/18
Clear
34%
19°
31°
Wed
8/19
Clear
35%
22°
33°
Thu
8/20
Clear
24%
22°
34°
Fri
8/21
Drizzle
60%
19°
34°
Sat
8/22
Drizzle
60%
19°
31°
Sun
8/23
Clear
60%
19°
31°
Mon
8/24
Drizzle
60%
18°
30°
Tue
8/25
Drizzle
60%
18°
30°
50
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
50 AQI 9.0 µg/m³
O3
Ground-level ozone
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 50 Good 39 50
Wed 39 Good 39 32
Thu 35 Good 35 29
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
SBCAPE1969 J/kg
MLCAPE1960 J/kg
MUCAPE2779 J/kg
SBCIN-466 J/kg
MLCIN0 J/kg
Lifted Index-6.9
Kinematics
0–6 km Shear18 kt
0–1 km Shear20 kt
Eff. Shear12 kt
0–1 km SRH153
0–3 km SRH134
Eff. SRH-8
Storm Motion315° @ 19 kt
0–1 km EHI1.9
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index25.8
Thermo & Levels
PWAT1.48 in
0–3 km LR4.1 °C/km
700–500 LR8.0 °C/km
Total Totals52.8
LCL965 hPa
LFC672 hPa
EL174 hPa
Freezing Lvl14,498 ft