Excessive Heat Warning — Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Perry, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO 8:00 PM

Jackson County, Illinois, United States

Last updated: 2:24 AM CDT  ·  Refresh
79°F
Feels like 86°
Clear
▲ 100°  /  ▼ 74°
Wind
3 mph SSW
Humidity
75%
Dew Point
72°
Pressure
29.48 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:30 AM
Sunset
7:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jackson County is currently clear at 79°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1752 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:21PM.

Alerts

Excessive Heat Warning
Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Perry, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO
Expires 8:00 PM
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
79°
10%
3 AM
79°
4%
4 AM
79°
3%
5 AM
75°
3%
6 AM
75°
3%
7 AM
76°
3%
8 AM
82°
7%
9 AM
87°
7%
10 AM
90°
15%
11 AM
93°
15%
12 PM
93°
16%
1 PM
98°
16%
2 PM
98°
16%
3 PM
99°
19%
4 PM
98°
19%
5 PM
99°
20%
6 PM
97°
14%
7 PM
94°
14%
8 PM
93°
15%
9 PM
84°
15%
10 PM
83°
5%
11 PM
82°
5%
12 AM
82°
5%
1 AM
82°
5%
7-Day Forecast
Today
100° 74°
Mostly Clear with a 20% chance of rain.
Sat
103° 74°
Mostly Clear with a 26% chance of rain.
Sun
98° 64°
Clear.
Mon
93° 56°
Fog.
Tue
102° 63°
Clear.
Wed
105° 73°
Drizzle, 38% chance.
Thu
101° 68°
Clear with a 53% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 79° Clear 10% 3 mph SSW 75%
3 AM 79° Clear 4% 4 mph SSW 77%
4 AM 79° Clear 3% 4 mph SSW 78%
5 AM 75° Clear 3% 4 mph SSW 79%
6 AM 75° Clear 3% 4 mph SSW 80%
7 AM 76° Clear 3% 4 mph SSW 77%
8 AM 82° Clear 7% 4 mph SW 68%
9 AM 87° Clear 7% 4 mph WSW 58%
10 AM 90° Clear 15% 4 mph WSW 50%
11 AM 93° Clear 15% 4 mph WSW 46%
12 PM 93° Mostly Clear 16% 4 mph WSW 42%
1 PM 98° Mostly Clear 16% 4 mph WSW 40%
2 PM 98° Mostly Clear 16% 4 mph SW 39%
3 PM 99° Mostly Clear 19% 5 mph SSW 38%
4 PM 98° Mostly Clear 19% 5 mph SSW 39%
5 PM 99° Mostly Clear 20% 4 mph SSW 43%
6 PM 97° Mostly Clear 14% 4 mph SSW 49%
7 PM 94° Mostly Clear 14% 4 mph SSW 54%
8 PM 93° Mostly Clear 15% 4 mph SSW 58%
9 PM 84° Clear 15% 5 mph SSW 61%
10 PM 83° Clear 5% 5 mph SSW 64%
11 PM 82° Clear 5% 5 mph SSW 66%
12 AM 82° Clear 5% 4 mph SSW 68%
1 AM 82° Clear 5% 5 mph SW 69%
15-Day Forecast
Today
9/4
Mostly Clear
20%
74°
100°
Sat
9/5
Mostly Clear
26%
74°
103°
Sun
9/6
Clear
13%
64°
98°
Mon
9/7
Fog
7%
56°
93°
Tue
9/8
Clear
3%
63°
102°
Wed
9/9
Drizzle
38%
73°
105°
Thu
9/10
Clear
53%
68°
101°
Fri
9/11
Drizzle
42%
62°
102°
Sat
9/12
Clear
19%
69°
108°
Sun
9/13
Clear
44%
64°
100°
Mon
9/14
Clear
60%
70°
99°
Tue
9/15
Drizzle
60%
72°
100°
Wed
9/16
Drizzle
60%
70°
99°
Thu
9/17
Clear
60%
67°
94°
Fri
9/18
Clear
25%
66°
94°
51
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
51 AQI 9.4 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 51 Moderate 44 51
Sat 55 Moderate 44 55
Sun 54 Moderate 50 54
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 4, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE766 J/kg
MLCAPE840 J/kg
MUCAPE1125 J/kg
SBCIN-325 J/kg
MLCIN-147 J/kg
Lifted Index-2.7
Kinematics
0–6 km Shear5 kt
0–1 km Shear10 kt
Eff. Shear6 kt
0–1 km SRH4
0–3 km SRH-14
Eff. SRH-13
Storm Motion26° @ 8 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.0
Thermo & Levels
PWAT1.71 in
0–3 km LR5.5 °C/km
700–500 LR5.4 °C/km
Total Totals47.5
LCL941 hPa
LFC736 hPa
EL226 hPa
Freezing Lvl16,437 ft