Excessive Heat Warning — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, 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, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 9:00 PM Excessive Heat Watch 7:00 PM

Calhoun County, Illinois, United States

Last updated: 8:56 AM CDT  ·  Refresh
29°C
Feels like 35°
Partly Cloudy
▲ 37°  /  ▼ 24°
Wind
4 mph SW
Humidity
83%
Dew Point
26°
Pressure
29.31 inHg
Visibility
6 mi
UV Index
6.2
Cloud Cover
44%
Sunrise
5:57 AM
Sunset
8:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Calhoun County is currently partly cloudy at 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 4325 J/kg) — isolated convective development possible. Sunrise: 5:57AM · Sunset: 8:19PM.

Alerts

Excessive Heat Warning
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, 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, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 9:00 PM
Excessive Heat Watch
Expires 7:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
13%
9 AM
31°
23%
10 AM
33°
21%
11 AM
34°
25%
12 PM
35°
25%
1 PM
36°
37%
2 PM
36°
40%
3 PM
35°
40%
4 PM
35°
40%
5 PM
35°
38%
6 PM
34°
25%
7 PM
33°
12%
8 PM
31°
8%
9 PM
29°
8%
10 PM
28°
8%
11 PM
28°
8%
12 AM
27°
3%
1 AM
26°
3%
2 AM
26°
3%
3 AM
27°
3%
4 AM
26°
3%
5 AM
26°
3%
6 AM
26°
3%
7 AM
27°
3%
7-Day Forecast
Today
37° 24°
Partly Cloudy with a 40% chance of rain.
Mon
39° 24°
Mostly Clear with a 36% chance of rain.
Tue
36° 22°
Mostly Clear with a 45% chance of rain.
Wed
33° 19°
Partly Cloudy.
Thu
33° 19°
Clear with a 29% chance of rain.
Fri
30° 20°
Rain, 82% chance.
Sat
32° 19°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Partly Cloudy 13% 4 mph SW 83%
9 AM 31° Partly Cloudy 23% 5 mph WSW 74%
10 AM 33° Partly Cloudy 21% 6 mph W 68%
11 AM 34° Partly Cloudy 25% 6 mph W 63%
12 PM 35° Partly Cloudy 25% 6 mph W 58%
1 PM 36° Mostly Clear 37% 7 mph WNW 58%
2 PM 36° Partly Cloudy 40% 10 mph WNW 58%
3 PM 35° Partly Cloudy 40% 13 mph NW 58%
4 PM 35° Mostly Cloudy 40% 10 mph WNW 60%
5 PM 35° Partly Cloudy 38% 8 mph WNW 62%
6 PM 34° Partly Cloudy 25% 5 mph W 65%
7 PM 33° Partly Cloudy 12% 3 mph WSW 68%
8 PM 31° Mostly Clear 8% 5 mph S 70%
9 PM 29° Clear 8% 7 mph SSE 73%
10 PM 28° Clear 8% 6 mph SSE 74%
11 PM 28° Clear 8% 5 mph S 74%
12 AM 27° Clear 3% 6 mph SSW 74%
1 AM 26° Mostly Clear 3% 6 mph SSW 75%
2 AM 26° Mostly Clear 3% 6 mph SSW 75%
3 AM 27° Partly Cloudy 3% 6 mph SSW 76%
4 AM 26° Partly Cloudy 3% 4 mph S 79%
5 AM 26° Partly Cloudy 3% 5 mph SSE 82%
6 AM 26° Mostly Cloudy 3% 5 mph SE 86%
7 AM 27° Partly Cloudy 3% 5 mph SSE 81%
15-Day Forecast
Today
7/26
Partly Cloudy
40%
24°
37°
Mon
7/27
Mostly Clear
36%
24°
39°
Tue
7/28
Mostly Clear
45%
22°
36°
Wed
7/29
Partly Cloudy
10%
19°
33°
Thu
7/30
Clear
29%
19°
33°
Fri
7/31
Rain
82%
20°
30°
Sat
8/1
Drizzle
52%
19°
32°
Sun
8/2
Drizzle
43%
19°
32°
Mon
8/3
Drizzle
44%
19°
34°
Tue
8/4
Drizzle
51%
22°
37°
Wed
8/5
Drizzle
60%
22°
36°
Thu
8/6
Drizzle
60%
21°
34°
Fri
8/7
Drizzle
60%
20°
34°
Sat
8/8
Drizzle
60%
21°
36°
Sun
8/9
Drizzle
60%
21°
36°
54
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
54 AQI 10.8 µg/m³
O3
Ground-level ozone
38 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 54 Moderate 38 54
Tue 44 Good 36 44
Wed 44 Good 44 34
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 Sun Jul 26, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3875 J/kg
MLCAPE2938 J/kg
MUCAPE3875 J/kg
SBCIN-61 J/kg
MLCIN0 J/kg
Lifted Index-6.9
Kinematics
0–6 km Shear15 kt
0–1 km Shear14 kt
Eff. Shear24 kt
0–1 km SRH-22
0–3 km SRH-36
Eff. SRH-36
Storm Motion282° @ 19 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.8
Thermo & Levels
PWAT1.79 in
0–3 km LR5.5 °C/km
700–500 LR6.0 °C/km
Total Totals48.2
LCL949 hPa
LFC868 hPa
EL142 hPa
Freezing Lvl16,526 ft