Frost Advisory — Greene, IL, Macoupin, IL, Montgomery, 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 9:00 AM

Montgomery County, Illinois, United States

Last updated: 7:29 PM CDT  ·  Refresh
11°C
Feels like 7°
Mostly Cloudy
▲ 12°  /  ▼ 2°
Wind
12 mph NNW
Humidity
77%
Dew Point
8°
Pressure
29.63 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
63%
Sunrise
7:07 AM
Sunset
6:17 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently mostly cloudy at 11°C. Precipitation is likely — peak probability 55% around 7 PM. Sunrise: 7:07AM · Sunset: 6:17PM.

Alerts

Frost Advisory
Greene, IL, Macoupin, IL, Montgomery, 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
Expires 9:00 AM
24 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
11°
54%
8 PM
11°
32%
9 PM
10°
7%
10 PM
9°
3%
11 PM
9°
3%
12 AM
8°
3%
1 AM
7°
3%
2 AM
7°
3%
3 AM
6°
3%
4 AM
5°
3%
5 AM
3°
3%
6 AM
2°
3%
7 AM
3°
3%
8 AM
4°
3%
9 AM
7°
3%
10 AM
8°
3%
11 AM
10°
3%
12 PM
11°
3%
1 PM
12°
3%
2 PM
14°
3%
3 PM
15°
3%
4 PM
14°
3%
5 PM
13°
3%
6 PM
12°
3%
7-Day Forecast
Tonight
12° 2°
Mostly Cloudy with a 54% chance of rain.
Sat
15° 2°
Clear.
Sun
19° 2°
Clear.
Mon
23° 4°
Clear.
Tue
24° 8°
Clear.
Wed
26° 9°
Clear.
Thu
27° 10°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 11° Mostly Cloudy 54% 12 mph NNW 77%
8 PM 11° Partly Cloudy 32% 13 mph NNW 78%
9 PM 10° Mostly Clear 7% 13 mph NNW 76%
10 PM 9° Mostly Clear 3% 12 mph NNW 75%
11 PM 9° Mostly Clear 3% 12 mph N 75%
12 AM 8° Mostly Clear 3% 12 mph N 75%
1 AM 7° Mostly Clear 3% 11 mph N 75%
2 AM 7° Mostly Clear 3% 11 mph N 76%
3 AM 6° Clear 3% 10 mph N 78%
4 AM 5° Clear 3% 10 mph N 80%
5 AM 3° Clear 3% 9 mph N 81%
6 AM 2° Clear 3% 8 mph N 83%
7 AM 3° Clear 3% 7 mph N 81%
8 AM 4° Clear 3% 7 mph N 74%
9 AM 7° Clear 3% 7 mph NNE 67%
10 AM 8° Clear 3% 6 mph NNE 62%
11 AM 10° Clear 3% 6 mph NE 56%
12 PM 11° Clear 3% 6 mph NE 50%
1 PM 12° Clear 3% 5 mph NE 46%
2 PM 14° Clear 3% 4 mph NE 43%
3 PM 15° Clear 3% 4 mph NE 40%
4 PM 14° Clear 3% 4 mph NE 41%
5 PM 13° Clear 3% 3 mph NE 44%
6 PM 12° Clear 3% 3 mph ENE 47%
15-Day Forecast
Today
10/16
Mostly Cloudy
54%
2°
12°
Sat
10/17
Clear
3%
2°
15°
Sun
10/18
Clear
3%
2°
19°
Mon
10/19
Clear
3%
4°
23°
Tue
10/20
Clear
3%
8°
24°
Wed
10/21
Clear
3%
9°
26°
Thu
10/22
Clear
3%
10°
27°
Fri
10/23
Clear
3%
11°
27°
Sat
10/24
Clear
44%
12°
27°
Sun
10/25
Drizzle
44%
11°
24°
Mon
10/26
Clear
25%
9°
23°
Tue
10/27
Clear
60%
8°
21°
Wed
10/28
Clear
60%
8°
21°
Thu
10/29
Drizzle
60%
9°
21°
Fri
10/30
Drizzle
60%
9°
19°
24
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
24 AQI 4.5 µg/m³
O3
Ground-level ozone
20 AQI 23 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 24 Good 20 24
Sun 29 Good 29 8
Mon 31 Good 31 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 Fri Oct 16, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE29 J/kg
MLCAPE62 J/kg
MUCAPE102 J/kg
SBCIN-26 J/kg
MLCIN-7 J/kg
Lifted Index4.2
Kinematics
0–6 km Shear44 kt
0–1 km Shear20 kt
Eff. Shear18 kt
0–1 km SRH100
0–3 km SRH102
Eff. SRH92
Storm Motion18° @ 32 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index22.0
Thermo & Levels
PWAT0.65 in
0–3 km LR6.6 °C/km
700–500 LR6.1 °C/km
Total Totals48.1
LCL951 hPa
LFC882 hPa
EL712 hPa
Freezing Lvl4,997 ft