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

McLean County, Illinois, United States

Last updated: 11:45 PM CDT  ·  Refresh
26°C
Feels like 26°
Mostly Clear
▲ 31°  /  ▼ 20°
Wind
9 mph SSW
Humidity
66%
Dew Point
20°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
11%
Sunrise
6:21 AM
Sunset
7:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: McLean County is currently mostly clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2684 J/kg) — isolated convective development possible. Sunrise: 6:21AM · Sunset: 7:28PM.

Alerts

Heat Advisory
Knox, IL, Stark, IL, Peoria, IL, Fulton, IL, Tazewell, IL, Schuyler, IL, Mason, IL, Logan, IL, De Witt, IL, Piatt, IL, Cass, IL, Menard, IL, Scott, IL, Morgan, IL, Sangamon, IL, Christian, IL, Macon, IL, Moultrie, IL, Douglas, IL, Coles, IL, Shelby, IL, Cumberland, IL, Clark, IL, Effingham, IL, Jasper, IL, Crawford, IL, Clay, IL, Richland, IL, Lawrence, IL, Marshall, IL, Woodford, IL, McLean, IL, Champaign, IL, Vermilion, IL, Edgar, IL
Expires 7:00 PM
59 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
8%
12 AM
26°
8%
1 AM
25°
8%
2 AM
24°
8%
3 AM
24°
8%
4 AM
23°
5%
5 AM
22°
5%
6 AM
22°
5%
7 AM
23°
5%
8 AM
26°
5%
9 AM
28°
5%
10 AM
29°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
35°
3%
3 PM
35°
3%
4 PM
34°
3%
5 PM
34°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
3%
9 PM
29°
3%
10 PM
28°
3%
7-Day Forecast
Tonight
31° 20°
Mostly Clear.
Tue
35° 22°
Clear.
Wed
38° 22°
Clear.
Thu
37° 22°
Partly Cloudy with a 42% chance of rain.
Fri
37° 22°
Partly Cloudy with a 44% chance of rain.
Sat
37° 22°
Rain, 81% chance.
Sun
34° 20°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 8% 9 mph SSW 66%
12 AM 26° Mostly Clear 8% 10 mph SSW 63%
1 AM 25° Mostly Clear 8% 10 mph SSW 66%
2 AM 24° Clear 8% 9 mph SW 69%
3 AM 24° Clear 8% 9 mph SW 71%
4 AM 23° Clear 5% 9 mph SW 73%
5 AM 22° Clear 5% 8 mph SW 76%
6 AM 22° Mostly Clear 5% 8 mph SW 77%
7 AM 23° Clear 5% 9 mph SW 75%
8 AM 26° Clear 5% 9 mph WSW 70%
9 AM 28° Clear 5% 10 mph WSW 65%
10 AM 29° Mostly Clear 3% 9 mph WSW 62%
11 AM 31° Clear 3% 9 mph WSW 57%
12 PM 32° Clear 3% 9 mph WSW 53%
1 PM 34° Clear 3% 9 mph WSW 50%
2 PM 35° Clear 3% 8 mph WSW 48%
3 PM 35° Clear 3% 8 mph WSW 46%
4 PM 34° Clear 3% 7 mph WSW 50%
5 PM 34° Clear 3% 6 mph SW 56%
6 PM 33° Clear 3% 6 mph SSW 62%
7 PM 32° Clear 3% 6 mph SSW 64%
8 PM 31° Clear 3% 6 mph SSW 65%
9 PM 29° Clear 3% 7 mph SSW 67%
10 PM 28° Clear 3% 7 mph SSW 67%
15-Day Forecast
Today
8/31
Mostly Clear
8%
20°
31°
Tue
9/1
Clear
8%
22°
35°
Wed
9/2
Clear
7%
22°
38°
Thu
9/3
Partly Cloudy
42%
22°
37°
Fri
9/4
Partly Cloudy
44%
22°
37°
Sat
9/5
Rain
81%
22°
37°
Sun
9/6
Clear
19%
20°
34°
Mon
9/7
Clear
19%
17°
33°
Tue
9/8
Drizzle
60%
18°
34°
Wed
9/9
Drizzle
60%
18°
36°
Thu
9/10
Drizzle
60%
17°
33°
Fri
9/11
Drizzle
60%
18°
32°
Sat
9/12
Drizzle
60%
16°
30°
Sun
9/13
Drizzle
60%
16°
29°
Mon
9/14
Drizzle
60%
16°
29°
59
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
59 AQI 13.6 µg/m³
O3
Ground-level ozone
47 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 59 Moderate 47 59
Wed 60 Moderate 48 60
Thu 52 Moderate 42 52
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 Tue Sep 1, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE211 J/kg
MLCAPE424 J/kg
MUCAPE703 J/kg
SBCIN-634 J/kg
MLCIN-374 J/kg
Lifted Index-1.3
Kinematics
0–6 km Shear26 kt
0–1 km Shear21 kt
Eff. Shear21 kt
0–1 km SRH185
0–3 km SRH179
Eff. SRH10
Storm Motion311° @ 18 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.1
K-Index37.6
Thermo & Levels
PWAT1.68 in
0–3 km LR4.6 °C/km
700–500 LR6.7 °C/km
Total Totals47.5
LCL906 hPa
LFC583 hPa
EL241 hPa
Freezing Lvl15,459 ft