Extreme Heat Warning — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM Heat Advisory — Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL 7:00 PM

Effingham County, Illinois, United States

Last updated: 1:54 AM CDT  ·  Refresh
25°C
Feels like 27°
Clear
▲ 36°  /  ▼ 23°
Wind
5 mph S
Humidity
72%
Dew Point
20°
Pressure
29.40 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:25 AM
Sunset
7:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Effingham County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1029 J/kg) — isolated convective development possible. Sunrise: 6:25AM · Sunset: 7:21PM.

Alerts

Extreme Heat Warning
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Marshall, IL, Woodford, IL, Fulton, IL, Tazewell, IL, McLean, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Champaign, IL, Vermilion, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Edgar, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL
Expires 7:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
8%
2 AM
24°
8%
3 AM
24°
3%
4 AM
24°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
24°
3%
8 AM
27°
3%
9 AM
30°
3%
10 AM
31°
3%
11 AM
32°
3%
12 PM
33°
3%
1 PM
36°
3%
2 PM
36°
3%
3 PM
36°
3%
4 PM
35°
3%
5 PM
36°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
33°
3%
9 PM
29°
3%
10 PM
28°
3%
11 PM
28°
3%
12 AM
27°
3%
7-Day Forecast
Today
36° 23°
Clear.
Fri
39° 23°
Mostly Clear.
Sat
40° 23°
Mostly Clear with a 30% chance of rain.
Sun
33° 18°
Fog.
Mon
36° 14°
Clear.
Tue
39° 18°
Clear.
Wed
42° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 8% 5 mph S 72%
2 AM 24° Clear 8% 5 mph SSW 70%
3 AM 24° Clear 3% 5 mph SSW 74%
4 AM 24° Clear 3% 5 mph S 76%
5 AM 22° Clear 3% 5 mph S 78%
6 AM 22° Clear 3% 5 mph S 80%
7 AM 24° Clear 3% 6 mph SSW 74%
8 AM 27° Clear 3% 7 mph SW 65%
9 AM 30° Clear 3% 8 mph SW 58%
10 AM 31° Clear 3% 8 mph SW 52%
11 AM 32° Mostly Clear 3% 9 mph SW 47%
12 PM 33° Mostly Clear 3% 9 mph SW 42%
1 PM 36° Mostly Clear 3% 8 mph SW 41%
2 PM 36° Mostly Clear 3% 8 mph SW 39%
3 PM 36° Mostly Clear 3% 8 mph SW 39%
4 PM 35° Clear 3% 6 mph SSW 42%
5 PM 36° Clear 3% 5 mph SSW 48%
6 PM 34° Clear 3% 4 mph SSW 54%
7 PM 33° Clear 3% 5 mph S 56%
8 PM 33° Clear 3% 6 mph S 58%
9 PM 29° Clear 3% 6 mph S 59%
10 PM 28° Clear 3% 6 mph S 59%
11 PM 28° Clear 3% 6 mph S 60%
12 AM 27° Clear 3% 6 mph S 61%
15-Day Forecast
Today
9/3
Clear
8%
23°
36°
Fri
9/4
Mostly Clear
3%
23°
39°
Sat
9/5
Mostly Clear
30%
23°
40°
Sun
9/6
Fog
16%
18°
33°
Mon
9/7
Clear
8%
14°
36°
Tue
9/8
Clear
17%
18°
39°
Wed
9/9
Clear
17%
23°
42°
Thu
9/10
Drizzle
68%
21°
41°
Fri
9/11
Drizzle
68%
20°
39°
Sat
9/12
Drizzle
44%
21°
39°
Sun
9/13
Drizzle
60%
20°
35°
Mon
9/14
Drizzle
60%
20°
36°
Tue
9/15
Drizzle
60%
18°
34°
Wed
9/16
Drizzle
60%
17°
33°
Thu
9/17
Drizzle
60%
17°
33°
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
45 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 45 52
Fri 52 Moderate 44 52
Sat 49 Good 47 49
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 Thu Sep 3, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE109 J/kg
MLCAPE26 J/kg
MUCAPE346 J/kg
SBCIN-568 J/kg
MLCIN-354 J/kg
Lifted Index-0.9
Kinematics
0–6 km Shear14 kt
0–1 km Shear15 kt
Eff. Shear9 kt
0–1 km SRH40
0–3 km SRH27
Eff. SRH-20
Storm Motion334° @ 10 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index29.2
Thermo & Levels
PWAT1.39 in
0–3 km LR5.0 °C/km
700–500 LR6.0 °C/km
Total Totals43.9
LCL928 hPa
LFC549 hPa
EL318 hPa
Freezing Lvl15,922 ft