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

Perry County, Illinois, United States

Last updated: 2:23 AM CDT  ·  Refresh
26°C
Feels like 29°
Clear
▲ 38°  /  ▼ 24°
Wind
4 mph S
Humidity
74%
Dew Point
22°
Pressure
29,48 inHg
Visibility
10 mi
UV Index
0,0
Cloud Cover
2%
Sunrise
6:29 AM
Sunset
7:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Perry County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1631 J/kg) — isolated convective development possible. Sunrise: 6:29AM · Sunset: 7:22PM.

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
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
8%
3 AM
26°
3%
4 AM
26°
3%
5 AM
24°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
27°
3%
9 AM
31°
3%
10 AM
33°
11%
11 AM
34°
11%
12 PM
35°
11%
1 PM
38°
11%
2 PM
38°
11%
3 PM
38°
11%
4 PM
38°
14%
5 PM
38°
14%
6 PM
37°
14%
7 PM
36°
14%
8 PM
34°
15%
9 PM
29°
15%
10 PM
29°
5%
11 PM
28°
5%
12 AM
28°
5%
1 AM
28°
5%
7-Day Forecast
Today
38° 24°
Clear.
Sat
41° 24°
Mostly Clear with a 26% chance of rain.
Sun
36° 18°
Mostly Clear.
Mon
33° 13°
Mostly Cloudy.
Tue
39° 17°
Clear.
Wed
41° 23°
Clear with a 28% chance of rain.
Thu
38° 19°
Clear with a 28% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Clear 8% 4 mph S 74%
3 AM 26° Clear 3% 5 mph S 74%
4 AM 26° Clear 3% 5 mph S 76%
5 AM 24° Clear 3% 4 mph SSW 77%
6 AM 23° Clear 3% 4 mph SSW 78%
7 AM 24° Clear 3% 4 mph SSW 76%
8 AM 27° Clear 3% 4 mph SW 68%
9 AM 31° Clear 3% 5 mph WSW 59%
10 AM 33° Clear 11% 5 mph WSW 52%
11 AM 34° Clear 11% 5 mph WSW 47%
12 PM 35° Clear 11% 5 mph WSW 43%
1 PM 38° Clear 11% 5 mph SW 40%
2 PM 38° Clear 11% 5 mph SW 39%
3 PM 38° Clear 11% 5 mph SW 39%
4 PM 38° Clear 14% 5 mph SW 40%
5 PM 38° Mostly Clear 14% 4 mph SSW 44%
6 PM 37° Mostly Clear 14% 4 mph SSW 49%
7 PM 36° Mostly Clear 14% 4 mph SSW 54%
8 PM 34° Mostly Clear 15% 4 mph SSW 57%
9 PM 29° Mostly Clear 15% 5 mph SSW 59%
10 PM 29° Mostly Clear 5% 5 mph SSW 61%
11 PM 28° Mostly Clear 5% 5 mph SSW 64%
12 AM 28° Clear 5% 5 mph SSW 66%
1 AM 28° Clear 5% 5 mph SSW 68%
15-Day Forecast
Today
9/4
Clear
15%
24°
38°
Sat
9/5
Mostly Clear
26%
24°
41°
Sun
9/6
Mostly Clear
13%
18°
36°
Mon
9/7
Mostly Cloudy
7%
13°
33°
Tue
9/8
Clear
3%
17°
39°
Wed
9/9
Clear
28%
23°
41°
Thu
9/10
Clear
28%
19°
38°
Fri
9/11
Rain
44%
16°
38°
Sat
9/12
Clear
19%
21°
42°
Sun
9/13
Clear
21%
18°
38°
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°
35°
Fri
9/18
Clear
25%
18°
35°
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 9.7 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 40 52
Sat 53 Moderate 44 53
Sun 53 Moderate 50 53
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 ven. sept. 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
SBCAPE511 J/kg
MLCAPE534 J/kg
MUCAPE727 J/kg
SBCIN-384 J/kg
MLCIN-188 J/kg
Lifted Index-2.3
Kinematics
0–6 km Shear6 kt
0–1 km Shear13 kt
Eff. Shear9 kt
0–1 km SRH21
0–3 km SRH-3
Eff. SRH-8
Storm Motion8° @ 7 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.5
Thermo & Levels
PWAT1.62 in
0–3 km LR5.5 °C/km
700–500 LR5.4 °C/km
Total Totals46.9
LCL939 hPa
LFC569 hPa
EL255 hPa
Freezing Lvl16,575 ft