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

Macoupin County, Illinois, United States

Last updated: 7:30 PM CDT  ·  Refresh
11°C
Feels like 6°
Overcast
▲ 12°  /  ▼ 2°
Wind
13 mph NNW
Humidity
80%
Dew Point
8°
Pressure
29.68 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
86%
Sunrise
7:09 AM
Sunset
6:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Macoupin County is currently overcast at 11°C. Precipitation is likely — peak probability 52% around 7 PM. Sunrise: 7:09AM · Sunset: 6:19PM.

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
21 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
11°
52%
8 PM
11°
31%
9 PM
10°
3%
10 PM
9°
3%
11 PM
9°
3%
12 AM
8°
3%
1 AM
7°
3%
2 AM
6°
3%
3 AM
6°
3%
4 AM
5°
3%
5 AM
3°
3%
6 AM
2°
3%
7 AM
2°
3%
8 AM
4°
3%
9 AM
7°
3%
10 AM
8°
3%
11 AM
9°
3%
12 PM
11°
3%
1 PM
12°
3%
2 PM
14°
3%
3 PM
14°
3%
4 PM
14°
3%
5 PM
13°
3%
6 PM
12°
3%
7-Day Forecast
Tonight
12° 2°
Overcast with a 52% 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° Overcast 52% 13 mph NNW 80%
8 PM 11° Mostly Cloudy 31% 14 mph NNW 80%
9 PM 10° Partly Cloudy 3% 13 mph NNW 78%
10 PM 9° Partly Cloudy 3% 12 mph NNW 78%
11 PM 9° Partly Cloudy 3% 11 mph NNW 79%
12 AM 8° Mostly Clear 3% 11 mph N 79%
1 AM 7° Mostly Clear 3% 10 mph N 79%
2 AM 6° Mostly Clear 3% 10 mph N 81%
3 AM 6° Clear 3% 9 mph N 83%
4 AM 5° Clear 3% 8 mph N 85%
5 AM 3° Clear 3% 7 mph N 86%
6 AM 2° Clear 3% 7 mph N 87%
7 AM 2° Clear 3% 6 mph N 84%
8 AM 4° Clear 3% 6 mph NNE 76%
9 AM 7° Clear 3% 7 mph NNE 67%
10 AM 8° Clear 3% 6 mph NE 61%
11 AM 9° Clear 3% 5 mph NE 56%
12 PM 11° Clear 3% 5 mph NE 50%
1 PM 12° Clear 3% 4 mph NE 46%
2 PM 14° Clear 3% 3 mph NE 42%
3 PM 14° Clear 3% 3 mph NE 40%
4 PM 14° Clear 3% 3 mph NE 40%
5 PM 13° Clear 3% 2 mph ENE 43%
6 PM 12° Clear 3% 2 mph ENE 45%
15-Day Forecast
Today
10/16
Overcast
52%
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
8%
11°
27°
Sat
10/24
Clear
44%
12°
27°
Sun
10/25
Clear
44%
11°
23°
Mon
10/26
Clear
60%
9°
23°
Tue
10/27
Clear
60%
8°
21°
Wed
10/28
Clear
60%
8°
20°
Thu
10/29
Drizzle
60%
9°
21°
Fri
10/30
Drizzle
60%
9°
19°
21
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
21 AQI 3.9 µg/m³
O3
Ground-level ozone
20 AQI 23 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 21 Good 20 21
Sun 29 Good 29 9
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 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE35 J/kg
MLCAPE52 J/kg
MUCAPE99 J/kg
SBCIN-18 J/kg
MLCIN-4 J/kg
Lifted Index5.5
Kinematics
0–6 km Shear53 kt
0–1 km Shear21 kt
Eff. Shear—
0–1 km SRH98
0–3 km SRH97
Eff. SRH—
Storm Motion19° @ 33 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index19.1
Thermo & Levels
PWAT0.65 in
0–3 km LR6.3 °C/km
700–500 LR5.6 °C/km
Total Totals44.7
LCL966 hPa
LFC895 hPa
EL727 hPa
Freezing Lvl4,928 ft