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

Douglas County, Illinois, United States

Last updated: 1:55 AM CDT  ·  Refresh
25°C
Feels like 27°
Clear
▲ 36°  /  ▼ 23°
Wind
6 mph SSW
Humidity
74%
Dew Point
21°
Pressure
29.29 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:22 AM
Sunset
7:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Douglas County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1605 J/kg) — isolated convective development possible. Sunrise: 6:22AM · Sunset: 7:20PM.

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
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
8%
2 AM
25°
8%
3 AM
24°
3%
4 AM
23°
3%
5 AM
22°
3%
6 AM
22°
3%
7 AM
24°
3%
8 AM
27°
7%
9 AM
29°
7%
10 AM
31°
7%
11 AM
32°
8%
12 PM
35°
8%
1 PM
35°
8%
2 PM
36°
8%
3 PM
36°
8%
4 PM
36°
8%
5 PM
35°
3%
6 PM
33°
3%
7 PM
33°
3%
8 PM
28°
3%
9 PM
27°
3%
10 PM
27°
3%
11 PM
27°
3%
12 AM
27°
3%
7-Day Forecast
Today
36° 23°
Clear.
Fri
39° 23°
Clear.
Sat
39° 22°
Mostly Clear with a 21% chance of rain.
Sun
31° 17°
Overcast.
Mon
33° 14°
Clear.
Tue
36° 17°
Clear with a 30% chance of rain.
Wed
41° 22°
Clear with a 31% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 8% 6 mph SSW 74%
2 AM 25° Clear 8% 6 mph SSW 72%
3 AM 24° Clear 3% 6 mph SSW 74%
4 AM 23° Clear 3% 6 mph SSW 76%
5 AM 22° Clear 3% 6 mph SSW 78%
6 AM 22° Clear 3% 6 mph SSW 80%
7 AM 24° Clear 3% 7 mph SSW 75%
8 AM 27° Clear 7% 8 mph SW 68%
9 AM 29° Clear 7% 9 mph SW 62%
10 AM 31° Clear 7% 9 mph SW 56%
11 AM 32° Clear 8% 10 mph SW 51%
12 PM 35° Clear 8% 10 mph SW 46%
1 PM 35° Clear 8% 10 mph SW 45%
2 PM 36° Clear 8% 9 mph SW 44%
3 PM 36° Mostly Clear 8% 9 mph SW 43%
4 PM 36° Clear 8% 8 mph SSW 48%
5 PM 35° Clear 3% 7 mph SSW 54%
6 PM 33° Clear 3% 7 mph S 60%
7 PM 33° Clear 3% 7 mph S 62%
8 PM 28° Clear 3% 7 mph S 64%
9 PM 27° Clear 3% 7 mph S 66%
10 PM 27° Clear 3% 7 mph S 67%
11 PM 27° Clear 3% 6 mph S 68%
12 AM 27° Clear 3% 6 mph S 69%
15-Day Forecast
Today
9/3
Clear
8%
23°
36°
Fri
9/4
Clear
12%
23°
39°
Sat
9/5
Mostly Clear
21%
22°
39°
Sun
9/6
Overcast
8%
17°
31°
Mon
9/7
Clear
16%
14°
33°
Tue
9/8
Clear
30%
17°
36°
Wed
9/9
Clear
31%
22°
41°
Thu
9/10
Drizzle
68%
20°
38°
Fri
9/11
Rain
68%
19°
38°
Sat
9/12
Drizzle
51%
21°
39°
Sun
9/13
Drizzle
60%
19°
33°
Mon
9/14
Drizzle
60%
19°
33°
Tue
9/15
Drizzle
60%
18°
32°
Wed
9/16
Drizzle
60%
17°
31°
Thu
9/17
Drizzle
60%
16°
31°
53
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
53 AQI 10.4 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 44 53
Fri 48 Good 45 48
Sat 48 Good 48 44
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
SBCAPE317 J/kg
MLCAPE218 J/kg
MUCAPE382 J/kg
SBCIN-442 J/kg
MLCIN-258 J/kg
Lifted Index-1.8
Kinematics
0–6 km Shear17 kt
0–1 km Shear10 kt
Eff. Shear9 kt
0–1 km SRH53
0–3 km SRH49
Eff. SRH2
Storm Motion321° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.1
Thermo & Levels
PWAT1.47 in
0–3 km LR5.3 °C/km
700–500 LR5.6 °C/km
Total Totals45.7
LCL934 hPa
LFC571 hPa
EL258 hPa
Freezing Lvl15,820 ft