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

Greene County, Illinois, United States

Last updated: 6:45 AM CDT  ·  Refresh
22°C
Feels like 25°
Partly Cloudy
▲ 34°  /  ▼ 21°
Wind
5 mph NE
Humidity
96%
Dew Point
22°
Pressure
29.59 inHg
Visibility
7 mi
UV Index
0.0
Cloud Cover
38%
Sunrise
6:45 AM
Sunset
7:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Greene County is currently partly cloudy at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1923 J/kg) — isolated convective development possible. Sunrise: 6:45AM · Sunset: 7:04PM.

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
45 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
15%
7 AM
21°
31%
8 AM
23°
29%
9 AM
24°
21%
10 AM
27°
29%
11 AM
29°
29%
12 PM
31°
23%
1 PM
33°
32%
2 PM
34°
36%
3 PM
34°
40%
4 PM
34°
40%
5 PM
32°
40%
6 PM
30°
40%
7 PM
28°
40%
8 PM
27°
37%
9 PM
26°
37%
10 PM
25°
30%
11 PM
24°
31%
12 AM
24°
31%
1 AM
23°
32%
2 AM
23°
32%
3 AM
23°
33%
4 AM
23°
24%
5 AM
22°
24%
7-Day Forecast
Today
34° 21°
Rain, 40% chance.
Sat
36° 21°
Mostly Cloudy with a 31% chance of rain.
Sun
33° 19°
Mostly Cloudy with a 66% chance of rain.
Mon
26° 16°
Overcast with a 80% chance of rain.
Tue
22° 12°
Partly Cloudy with a 22% chance of rain.
Wed
26° 12°
Mostly Cloudy.
Thu
25° 11°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 22° Partly Cloudy 15% 5 mph NE 96%
7 AM 21° Partly Cloudy 31% 7 mph ENE 91%
8 AM 23° Partly Cloudy 29% 7 mph ENE 85%
9 AM 24° Mostly Clear 21% 7 mph E 80%
10 AM 27° Mostly Clear 29% 6 mph E 73%
11 AM 29° Clear 29% 6 mph E 66%
12 PM 31° Clear 23% 5 mph E 59%
1 PM 33° Clear 32% 4 mph ESE 55%
2 PM 34° Clear 36% 4 mph ESE 52%
3 PM 34° Clear 40% 3 mph ESE 50%
4 PM 34° Mostly Clear 40% 5 mph ENE 54%
5 PM 32° Mostly Clear 40% 7 mph NE 61%
6 PM 30° Rain 40% 8 mph NE 69%
7 PM 28° Rain 40% 7 mph NE 74%
8 PM 27° Drizzle 37% 5 mph E 78%
9 PM 26° Drizzle 37% 6 mph ESE 82%
10 PM 25° Mostly Clear 30% 8 mph ESE 85%
11 PM 24° Mostly Clear 31% 7 mph SE 87%
12 AM 24° Mostly Clear 31% 7 mph SE 88%
1 AM 23° Mostly Clear 32% 7 mph SE 89%
2 AM 23° Mostly Clear 32% 7 mph SE 88%
3 AM 23° Mostly Clear 33% 7 mph SE 88%
4 AM 23° Partly Cloudy 24% 7 mph SE 88%
5 AM 22° Partly Cloudy 24% 6 mph SSE 88%
15-Day Forecast
Today
9/18
Rain
40%
21°
34°
Sat
9/19
Mostly Cloudy
31%
21°
36°
Sun
9/20
Mostly Cloudy
66%
19°
33°
Mon
9/21
Overcast
80%
16°
26°
Tue
9/22
Partly Cloudy
22%
12°
22°
Wed
9/23
Mostly Cloudy
5%
12°
26°
Thu
9/24
Overcast
15%
11°
25°
Fri
9/25
Rain
48%
13°
24°
Sat
9/26
Mostly Clear
35%
13°
25°
Sun
9/27
Drizzle
54%
13°
26°
Mon
9/28
Drizzle
60%
14°
29°
Tue
9/29
Drizzle
60%
16°
29°
Wed
9/30
Drizzle
60%
15°
29°
Thu
10/1
Clear
60%
15°
29°
Fri
10/2
Drizzle
60%
13°
27°
45
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
43 AQI 7.9 µg/m³
O3
Ground-level ozone
Dominant
45 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 45 Good 45 43
Sun 51 Moderate 40 51
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
SBCAPE248 J/kg
MLCAPE328 J/kg
MUCAPE787 J/kg
SBCIN-377 J/kg
MLCIN-321 J/kg
Lifted Index-1.4
Kinematics
0–6 km Shear19 kt
0–1 km Shear15 kt
Eff. Shear11 kt
0–1 km SRH76
0–3 km SRH51
Eff. SRH13
Storm Motion326° @ 18 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index40.3
Thermo & Levels
PWAT1.80 in
0–3 km LR4.3 °C/km
700–500 LR5.7 °C/km
Total Totals49.9
LCL993 hPa
LFC702 hPa
EL337 hPa
Freezing Lvl14,534 ft