Extreme 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

Franklin County, Illinois, United States

Last updated: 2:25 AM CDT  ·  Refresh
26°C
Feels like 29°
Clear
▲ 38°  /  ▼ 24°
Wind
3 mph S
Humidity
75%
Dew Point
21°
Pressure
29.49 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
3%
Sunrise
6:28 AM
Sunset
7:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Franklin County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1730 J/kg) — isolated convective development possible. Sunrise: 6:28AM · Sunset: 7:20PM.

Alerts

Extreme 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
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
10%
3 AM
26°
4%
4 AM
26°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
27°
7%
9 AM
31°
7%
10 AM
33°
16%
11 AM
34°
16%
12 PM
35°
16%
1 PM
37°
16%
2 PM
37°
19%
3 PM
37°
19%
4 PM
37°
19%
5 PM
38°
20%
6 PM
37°
18%
7 PM
36°
18%
8 PM
34°
18%
9 PM
29°
19%
10 PM
28°
9%
11 PM
28°
9%
12 AM
28°
9%
1 AM
28°
9%
7-Day Forecast
Today
38° 24°
Mostly Clear with a 20% chance of rain.
Sat
41° 24°
Mostly Clear with a 38% chance of rain.
Sun
36° 18°
Mostly Clear.
Mon
34° 13°
Fog.
Tue
39° 17°
Clear.
Wed
41° 23°
Drizzle, 38% chance.
Thu
38° 19°
Clear with a 53% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Clear 10% 3 mph S 75%
3 AM 26° Clear 4% 4 mph S 75%
4 AM 26° Clear 3% 4 mph SSW 76%
5 AM 23° Clear 3% 4 mph S 77%
6 AM 23° Clear 3% 4 mph S 78%
7 AM 24° Clear 3% 3 mph SSW 75%
8 AM 27° Clear 7% 3 mph SW 66%
9 AM 31° Clear 7% 4 mph WSW 57%
10 AM 33° Clear 16% 5 mph WSW 49%
11 AM 34° Clear 16% 5 mph WSW 44%
12 PM 35° Mostly Clear 16% 5 mph WSW 40%
1 PM 37° Mostly Clear 16% 5 mph WSW 38%
2 PM 37° Mostly Clear 19% 5 mph SW 38%
3 PM 37° Mostly Clear 19% 6 mph SW 38%
4 PM 37° Partly Cloudy 19% 6 mph SSW 40%
5 PM 38° Mostly Clear 20% 5 mph SW 43%
6 PM 37° Mostly Clear 18% 4 mph SW 47%
7 PM 36° Mostly Clear 18% 4 mph SW 52%
8 PM 34° Mostly Clear 18% 4 mph SSW 56%
9 PM 29° Mostly Clear 19% 4 mph S 60%
10 PM 28° Mostly Clear 9% 5 mph S 63%
11 PM 28° Mostly Clear 9% 4 mph SSW 65%
12 AM 28° Mostly Clear 9% 5 mph SSW 67%
1 AM 28° Mostly Clear 9% 5 mph SW 68%
15-Day Forecast
Today
9/4
Mostly Clear
20%
24°
38°
Sat
9/5
Mostly Clear
38%
24°
41°
Sun
9/6
Mostly Clear
13%
18°
36°
Mon
9/7
Fog
7%
13°
34°
Tue
9/8
Clear
3%
17°
39°
Wed
9/9
Drizzle
38%
23°
41°
Thu
9/10
Clear
53%
19°
38°
Fri
9/11
Rain
44%
16°
37°
Sat
9/12
Clear
19%
21°
42°
Sun
9/13
Clear
44%
17°
37°
Mon
9/14
Clear
60%
21°
38°
Tue
9/15
Drizzle
60%
22°
38°
Wed
9/16
Drizzle
60%
21°
38°
Thu
9/17
Clear
60%
19°
34°
Fri
9/18
Clear
25%
18°
34°
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 10.5 µg/m³
O3
Ground-level ozone
44 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 44 54
Sat 56 Moderate 44 56
Sun 54 Moderate 48 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
SBCAPE241 J/kg
MLCAPE734 J/kg
MUCAPE927 J/kg
SBCIN-455 J/kg
MLCIN-159 J/kg
Lifted Index-1.1
Kinematics
0–6 km Shear7 kt
0–1 km Shear11 kt
Eff. Shear7 kt
0–1 km SRH17
0–3 km SRH1
Eff. SRH-6
Storm Motion7° @ 8 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.9
Thermo & Levels
PWAT1.72 in
0–3 km LR5.4 °C/km
700–500 LR5.3 °C/km
Total Totals47.9
LCL934 hPa
LFC546 hPa
EL292 hPa
Freezing Lvl16,499 ft