Heat Advisory — 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 7:00 PM

Franklin County, Illinois, United States

Last updated: 6:20 AM CDT  ·  Refresh
22°C
Feels like 23°
Partly Cloudy
▲ 36°  /  ▼ 19°
Wind
5 mph SSW
Humidity
67%
Dew Point
16°
Pressure
29.44 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
58%
Sunrise
6:41 AM
Sunset
6:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Franklin County is currently partly cloudy at 22°C. Precipitation is likely — peak probability 61% around 1 AM. Atmospheric instability is elevated (CAPE up to 532 J/kg) — isolated convective development possible. Sunrise: 6:41AM · Sunset: 6:55PM.

Alerts

Heat Advisory
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 7:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
11%
7 AM
22°
21%
8 AM
24°
21%
9 AM
27°
14%
10 AM
29°
14%
11 AM
31°
14%
12 PM
32°
14%
1 PM
34°
3%
2 PM
35°
4%
3 PM
36°
4%
4 PM
36°
4%
5 PM
36°
8%
6 PM
34°
11%
7 PM
32°
16%
8 PM
31°
26%
9 PM
27°
40%
10 PM
26°
53%
11 PM
26°
53%
12 AM
24°
54%
1 AM
23°
60%
2 AM
22°
60%
3 AM
22°
56%
4 AM
22°
53%
5 AM
19°
52%
7-Day Forecast
Today
36° 19°
Mostly Cloudy with a 40% chance of rain.
Mon
30° 16°
Overcast with a 54% chance of rain.
Tue
26° 14°
Overcast with a 32% chance of rain.
Wed
27° 12°
Overcast.
Thu
28° 11°
Mostly Cloudy.
Fri
28° 12°
Overcast.
Sat
28° 12°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 22° Partly Cloudy 11% 5 mph SSW 67%
7 AM 22° Overcast 21% 6 mph SW 64%
8 AM 24° Overcast 21% 6 mph SW 56%
9 AM 27° Overcast 14% 8 mph SW 47%
10 AM 29° Overcast 14% 9 mph SW 43%
11 AM 31° Mostly Cloudy 14% 9 mph WSW 42%
12 PM 32° Partly Cloudy 14% 9 mph WSW 41%
1 PM 34° Partly Cloudy 3% 9 mph WSW 38%
2 PM 35° Partly Cloudy 4% 8 mph WSW 35%
3 PM 36° Mostly Cloudy 4% 9 mph WSW 32%
4 PM 36° Overcast 4% 8 mph WSW 28%
5 PM 36° Mostly Cloudy 8% 7 mph W 31%
6 PM 34° Mostly Cloudy 11% 6 mph W 35%
7 PM 32° Mostly Cloudy 16% 5 mph W 41%
8 PM 31° Partly Cloudy 26% 5 mph N 50%
9 PM 27° Partly Cloudy 40% 6 mph NE 57%
10 PM 26° Partly Cloudy 53% 7 mph NE 64%
11 PM 26° Mostly Cloudy 53% 7 mph NNE 71%
12 AM 24° Mostly Cloudy 54% 7 mph N 80%
1 AM 23° Mostly Cloudy 60% 7 mph N 86%
2 AM 22° Mostly Cloudy 60% 8 mph N 87%
3 AM 22° Mostly Cloudy 56% 8 mph N 87%
4 AM 22° Mostly Cloudy 53% 8 mph N 88%
5 AM 19° Overcast 52% 8 mph N 89%
15-Day Forecast
Today
9/20
Mostly Cloudy
40%
19°
36°
Mon
9/21
Overcast
54%
16°
30°
Tue
9/22
Overcast
32%
14°
26°
Wed
9/23
Overcast
3%
12°
27°
Thu
9/24
Mostly Cloudy
3%
11°
28°
Fri
9/25
Overcast
15%
12°
28°
Sat
9/26
Overcast
9%
12°
28°
Sun
9/27
Partly Cloudy
39%
12°
28°
Mon
9/28
Clear
35%
12°
31°
Tue
9/29
Overcast
35%
16°
30°
Wed
9/30
Drizzle
60%
15°
30°
Thu
10/1
Drizzle
60%
14°
29°
Fri
10/2
Drizzle
60%
14°
29°
Sat
10/3
Drizzle
60%
14°
29°
Sun
10/4
Clear
25%
13°
28°
52
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
52 AQI 9.4 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 44 52
Mon 55 Moderate 46 55
Tue 42 Good 42 41
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 Sun Sep 20, 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
SBCAPE0 J/kg
MLCAPE21 J/kg
MUCAPE84 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index3.5
Kinematics
0–6 km Shear34 kt
0–1 km Shear10 kt
Eff. Shear—
0–1 km SRH47
0–3 km SRH90
Eff. SRH—
Storm Motion300° @ 23 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index25.2
Thermo & Levels
PWAT1.35 in
0–3 km LR4.4 °C/km
700–500 LR6.2 °C/km
Total Totals43.2
LCL911 hPa
LFC—
EL—
Freezing Lvl15,315 ft