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

Calhoun County, Illinois, United States

Last updated: 7:28 PM CDT  ·  Refresh
11°C
Feels like 5°
Mostly Cloudy
▲ 13°  /  ▼ 2°
Wind
16 mph NNW
Humidity
75%
Dew Point
7°
Pressure
29.72 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
62%
Sunrise
7:12 AM
Sunset
6:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Calhoun County is currently mostly cloudy at 11°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:12AM · Sunset: 6:22PM.

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
23 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
11°
24%
8 PM
12°
8%
9 PM
10°
3%
10 PM
9°
3%
11 PM
9°
3%
12 AM
8°
3%
1 AM
8°
3%
2 AM
7°
3%
3 AM
6°
3%
4 AM
6°
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
9°
3%
12 PM
11°
3%
1 PM
13°
3%
2 PM
15°
3%
3 PM
15°
3%
4 PM
15°
3%
5 PM
13°
3%
6 PM
12°
3%
7-Day Forecast
Tonight
13° 2°
Mostly Cloudy with a 24% chance of rain.
Sat
16° 2°
Clear.
Sun
21° 4°
Clear.
Mon
24° 4°
Clear.
Tue
26° 8°
Clear.
Wed
27° 10°
Clear.
Thu
28° 11°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 11° Mostly Cloudy 24% 16 mph NNW 75%
8 PM 12° Mostly Clear 8% 13 mph NNW 75%
9 PM 10° Mostly Clear 3% 12 mph NNW 74%
10 PM 9° Mostly Clear 3% 11 mph NNW 74%
11 PM 9° Mostly Clear 3% 10 mph NNW 76%
12 AM 8° Mostly Clear 3% 10 mph NNW 77%
1 AM 8° Clear 3% 9 mph N 78%
2 AM 7° Clear 3% 8 mph N 80%
3 AM 6° Clear 3% 8 mph N 82%
4 AM 6° Clear 3% 7 mph N 84%
5 AM 3° Clear 3% 6 mph N 86%
6 AM 2° Mostly Clear 3% 6 mph NNW 87%
7 AM 3° Mostly Clear 3% 5 mph NNW 85%
8 AM 4° Clear 3% 5 mph N 75%
9 AM 7° Clear 3% 6 mph NNE 65%
10 AM 8° Clear 3% 5 mph NNE 57%
11 AM 9° Clear 3% 4 mph NE 50%
12 PM 11° Clear 3% 4 mph NE 44%
1 PM 13° Clear 3% 3 mph NE 40%
2 PM 15° Clear 3% 3 mph ENE 38%
3 PM 15° Clear 3% 3 mph ENE 37%
4 PM 15° Clear 3% 2 mph ENE 37%
5 PM 13° Clear 3% 2 mph E 40%
6 PM 12° Clear 3% 2 mph E 43%
15-Day Forecast
Today
10/16
Mostly Cloudy
24%
2°
13°
Sat
10/17
Clear
3%
2°
16°
Sun
10/18
Clear
3%
4°
21°
Mon
10/19
Clear
3%
4°
24°
Tue
10/20
Clear
3%
8°
26°
Wed
10/21
Clear
3%
10°
27°
Thu
10/22
Clear
3%
11°
28°
Fri
10/23
Clear
8%
12°
29°
Sat
10/24
Drizzle
44%
12°
29°
Sun
10/25
Drizzle
44%
10°
24°
Mon
10/26
Clear
60%
9°
24°
Tue
10/27
Clear
60%
8°
21°
Wed
10/28
Clear
60%
8°
21°
Thu
10/29
Drizzle
60%
9°
23°
Fri
10/30
Drizzle
60%
9°
21°
23
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
18 AQI 3.4 µg/m³
O3
Ground-level ozone
Dominant
23 AQI 26 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 23 Good 23 18
Sun 30 Good 30 9
Mon 46 Good 31 46
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 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE8 J/kg
MLCAPE39 J/kg
MUCAPE64 J/kg
SBCIN-35 J/kg
MLCIN-6 J/kg
Lifted Index9.0
Kinematics
0–6 km Shear59 kt
0–1 km Shear22 kt
Eff. Shear—
0–1 km SRH103
0–3 km SRH83
Eff. SRH—
Storm Motion20° @ 35 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index14.9
Thermo & Levels
PWAT0.63 in
0–3 km LR6.2 °C/km
700–500 LR4.8 °C/km
Total Totals39.7
LCL949 hPa
LFC873 hPa
EL784 hPa
Freezing Lvl4,803 ft