Heat Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Fayette, IL, Calhoun, IL, Jersey, IL, Boone, MO, Callaway, MO, Montgomery, MO, Lincoln, MO 8:00 PM

Montgomery County, Illinois, United States

Last updated: 6:44 AM CDT  ·  Refresh
22°C
Feels like 24°
Partly Cloudy
▲ 32°  /  ▼ 21°
Wind
6 mph NE
Humidity
95%
Dew Point
21°
Pressure
29.49 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
45%
Sunrise
6:42 AM
Sunset
7:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently partly cloudy at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1592 J/kg) — isolated convective development possible. Sunrise: 6:42AM · Sunset: 7:01PM.

Alerts

Heat Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Fayette, IL, Calhoun, IL, Jersey, IL, Boone, MO, Callaway, MO, Montgomery, MO, Lincoln, MO
Expires 8:00 PM
46 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
12%
7 AM
22°
29%
8 AM
23°
29%
9 AM
24°
21%
10 AM
27°
31%
11 AM
29°
33%
12 PM
31°
31%
1 PM
32°
32%
2 PM
32°
33%
3 PM
32°
33%
4 PM
32°
41%
5 PM
32°
42%
6 PM
31°
42%
7 PM
29°
45%
8 PM
28°
45%
9 PM
25°
42%
10 PM
24°
35%
11 PM
24°
35%
12 AM
23°
27%
1 AM
23°
22%
2 AM
23°
22%
3 AM
23°
22%
4 AM
23°
23%
5 AM
22°
23%
7-Day Forecast
Today
32° 21°
Thunderstorm, 42% chance.
Sat
36° 21°
Haze with a 27% chance of rain.
Sun
34° 19°
Mostly Cloudy with a 58% chance of rain.
Mon
26° 16°
Partly Cloudy with a 72% chance of rain.
Tue
22° 13°
Mostly Cloudy with a 37% chance of rain.
Wed
25° 12°
Overcast.
Thu
24° 12°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 22° Partly Cloudy 12% 6 mph NE 95%
7 AM 22° Partly Cloudy 29% 7 mph ENE 90%
8 AM 23° Partly Cloudy 29% 7 mph ENE 85%
9 AM 24° Mostly Clear 21% 7 mph ENE 79%
10 AM 27° Clear 31% 6 mph ENE 71%
11 AM 29° Clear 33% 5 mph ENE 64%
12 PM 31° Clear 31% 5 mph E 58%
1 PM 32° Mostly Clear 32% 4 mph ESE 57%
2 PM 32° Mostly Clear 33% 4 mph SSE 58%
3 PM 32° Partly Cloudy 33% 6 mph SSW 60%
4 PM 32° Partly Cloudy 41% 6 mph W 61%
5 PM 32° Mostly Clear 42% 8 mph NNW 64%
6 PM 31° Thunderstorm 42% 10 mph N 69%
7 PM 29° Drizzle 45% 9 mph NNE 73%
8 PM 28° Drizzle 45% 6 mph ENE 76%
9 PM 25° Drizzle 42% 7 mph ESE 79%
10 PM 24° Partly Cloudy 35% 8 mph ESE 86%
11 PM 24° Partly Cloudy 35% 8 mph ESE 87%
12 AM 23° Partly Cloudy 27% 7 mph ESE 88%
1 AM 23° Partly Cloudy 22% 7 mph SE 89%
2 AM 23° Partly Cloudy 22% 7 mph SE 90%
3 AM 23° Partly Cloudy 22% 7 mph SE 91%
4 AM 23° Partly Cloudy 23% 7 mph SE 91%
5 AM 22° Partly Cloudy 23% 7 mph SSE 91%
15-Day Forecast
Today
9/18
Thunderstorm
42%
21°
32°
Sat
9/19
Haze
27%
21°
36°
Sun
9/20
Mostly Cloudy
58%
19°
34°
Mon
9/21
Partly Cloudy
72%
16°
26°
Tue
9/22
Mostly Cloudy
37%
13°
22°
Wed
9/23
Overcast
5%
12°
25°
Thu
9/24
Overcast
10%
12°
24°
Fri
9/25
Overcast
27%
13°
24°
Sat
9/26
Mostly Clear
21%
13°
25°
Sun
9/27
Clear
54%
13°
25°
Mon
9/28
Clear
46%
14°
28°
Tue
9/29
Clear
60%
15°
29°
Wed
9/30
Drizzle
60%
15°
29°
Thu
10/1
Clear
60%
15°
29°
Fri
10/2
Drizzle
60%
13°
27°
46
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
41 AQI 7.3 µg/m³
O3
Ground-level ozone
Dominant
46 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 46 Good 46 41
Sun 47 Good 47 46
Mon 44 Good 44 39
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 18, 10:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE106 J/kg
MLCAPE264 J/kg
MUCAPE1353 J/kg
SBCIN-395 J/kg
MLCIN-260 J/kg
Lifted Index-0.9
Kinematics
0–6 km Shear18 kt
0–1 km Shear15 kt
Eff. Shear6 kt
0–1 km SRH57
0–3 km SRH44
Eff. SRH-2
Storm Motion329° @ 18 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index42.0
Thermo & Levels
PWAT1.83 in
0–3 km LR4.4 °C/km
700–500 LR5.7 °C/km
Total Totals51.2
LCL987 hPa
LFC677 hPa
EL372 hPa
Freezing Lvl14,715 ft