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

Brown County, Illinois, United States

Last updated: 7:29 PM CDT  ·  Refresh
10°C
Feels like 7°
Mostly Cloudy
▲ 12°  /  ▼ 1°
Wind
15 mph NNW
Humidity
75%
Dew Point
6°
Pressure
29.66 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
61%
Sunrise
7:13 AM
Sunset
6:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Brown County is currently mostly cloudy at 10°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:13AM · Sunset: 6:21PM.

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
10°
8%
8 PM
10°
8%
9 PM
8°
3%
10 PM
8°
3%
11 PM
7°
3%
12 AM
6°
3%
1 AM
6°
3%
2 AM
5°
3%
3 AM
4°
3%
4 AM
4°
3%
5 AM
2°
3%
6 AM
1°
3%
7 AM
1°
3%
8 AM
3°
3%
9 AM
6°
3%
10 AM
7°
3%
11 AM
9°
3%
12 PM
10°
3%
1 PM
13°
3%
2 PM
14°
3%
3 PM
14°
3%
4 PM
14°
3%
5 PM
12°
3%
6 PM
11°
3%
7-Day Forecast
Tonight
12° 1°
Mostly Cloudy.
Sat
15° 1°
Clear.
Sun
21° 3°
Clear.
Mon
24° 4°
Clear.
Tue
26° 8°
Clear.
Wed
27° 11°
Clear.
Thu
28° 11°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 10° Mostly Cloudy 8% 15 mph NNW 75%
8 PM 10° Mostly Clear 8% 13 mph NNW 75%
9 PM 8° Mostly Clear 3% 12 mph NNW 76%
10 PM 8° Mostly Clear 3% 11 mph NNW 77%
11 PM 7° Clear 3% 10 mph NNW 78%
12 AM 6° Clear 3% 10 mph N 79%
1 AM 6° Clear 3% 9 mph N 81%
2 AM 5° Clear 3% 8 mph N 83%
3 AM 4° Clear 3% 7 mph N 85%
4 AM 4° Clear 3% 6 mph N 86%
5 AM 2° Mostly Clear 3% 6 mph N 87%
6 AM 1° Mostly Clear 3% 5 mph NNW 88%
7 AM 1° Mostly Clear 3% 5 mph NNW 85%
8 AM 3° Mostly Clear 3% 4 mph N 78%
9 AM 6° Clear 3% 4 mph NNE 69%
10 AM 7° Clear 3% 3 mph NE 60%
11 AM 9° Clear 3% 2 mph ENE 52%
12 PM 10° Clear 3% 2 mph E 44%
1 PM 13° Clear 3% 2 mph SE 38%
2 PM 14° Clear 3% 2 mph SSE 36%
3 PM 14° Clear 3% 2 mph S 34%
4 PM 14° Clear 3% 3 mph SSW 35%
5 PM 12° Clear 3% 3 mph S 37%
6 PM 11° Clear 3% 3 mph S 39%
15-Day Forecast
Today
10/16
Mostly Cloudy
8%
1°
12°
Sat
10/17
Clear
3%
1°
15°
Sun
10/18
Clear
3%
3°
21°
Mon
10/19
Clear
3%
4°
24°
Tue
10/20
Clear
3%
8°
26°
Wed
10/21
Clear
3%
11°
27°
Thu
10/22
Clear
3%
11°
28°
Fri
10/23
Clear
8%
13°
29°
Sat
10/24
Drizzle
44%
12°
29°
Sun
10/25
Drizzle
44%
9°
22°
Mon
10/26
Clear
25%
8°
24°
Tue
10/27
Drizzle
60%
8°
20°
Wed
10/28
Clear
60%
8°
21°
Thu
10/29
Drizzle
60%
8°
22°
Fri
10/30
Drizzle
60%
8°
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
22 AQI 4.0 µg/m³
O3
Ground-level ozone
Dominant
23 AQI 25 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 23 Good 23 22
Sun 29 Good 29 6
Mon 30 Good 30 28
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 LCL0°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
SBCAPE0 J/kg
MLCAPE5 J/kg
MUCAPE23 J/kg
SBCIN—
MLCIN-25 J/kg
Lifted Index11.4
Kinematics
0–6 km Shear59 kt
0–1 km Shear23 kt
Eff. Shear—
0–1 km SRH130
0–3 km SRH111
Eff. SRH—
Storm Motion23° @ 36 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index10.0
Thermo & Levels
PWAT0.54 in
0–3 km LR6.0 °C/km
700–500 LR4.2 °C/km
Total Totals35.8
LCL951 hPa
LFC—
EL—
Freezing Lvl4,603 ft