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

Knox County, Illinois, United States

Last updated: 11:45 PM CDT  ·  Refresh
26°C
Feels like 28°
Mostly Clear
▲ 31°  /  ▼ 21°
Wind
4 mph SSW
Humidity
77%
Dew Point
22°
Pressure
29.18 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
21%
Sunrise
6:26 AM
Sunset
7:34 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Knox County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2443 J/kg) — isolated convective development possible. Sunrise: 6:26AM · Sunset: 7:34PM.

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
58 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
8%
12 AM
25°
8%
1 AM
24°
8%
2 AM
24°
8%
3 AM
24°
8%
4 AM
23°
8%
5 AM
21°
8%
6 AM
21°
5%
7 AM
23°
11%
8 AM
25°
15%
9 AM
27°
15%
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
33°
3%
6 PM
32°
3%
7 PM
31°
3%
8 PM
30°
3%
9 PM
29°
3%
10 PM
28°
3%
7-Day Forecast
Tonight
31° 21°
Mostly Clear.
Tue
35° 21°
Mostly Clear.
Wed
38° 22°
Mostly Clear.
Thu
36° 21°
Partly Cloudy with a 43% chance of rain.
Fri
36° 22°
Fog with a 44% chance of rain.
Sat
36° 23°
Clear with a 35% chance of rain.
Sun
34° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 8% 4 mph SSW 77%
12 AM 25° Clear 8% 6 mph SSW 69%
1 AM 24° Mostly Clear 8% 6 mph SW 70%
2 AM 24° Partly Cloudy 8% 5 mph SW 71%
3 AM 24° Mostly Clear 8% 5 mph SW 73%
4 AM 23° Mostly Clear 8% 5 mph SW 76%
5 AM 21° Mostly Clear 8% 5 mph SW 78%
6 AM 21° Mostly Clear 5% 6 mph SW 80%
7 AM 23° Partly Cloudy 11% 6 mph SW 78%
8 AM 25° Partly Cloudy 15% 7 mph SW 73%
9 AM 27° Mostly Clear 15% 8 mph WSW 68%
10 AM 29° Mostly Clear 3% 8 mph WSW 63%
11 AM 31° Partly Cloudy 3% 8 mph WSW 59%
12 PM 32° Partly Cloudy 3% 9 mph WSW 55%
1 PM 34° Partly Cloudy 3% 9 mph SW 52%
2 PM 35° Mostly Clear 3% 9 mph SW 50%
3 PM 35° Clear 3% 9 mph SW 48%
4 PM 34° Clear 3% 8 mph SW 52%
5 PM 33° Clear 3% 7 mph SW 58%
6 PM 32° Clear 3% 7 mph SSW 64%
7 PM 31° Clear 3% 7 mph SSW 66%
8 PM 30° Clear 3% 7 mph SSW 67%
9 PM 29° Clear 3% 7 mph SSW 68%
10 PM 28° Clear 3% 7 mph SSW 68%
15-Day Forecast
Today
8/31
Mostly Clear
8%
21°
31°
Tue
9/1
Mostly Clear
15%
21°
35°
Wed
9/2
Mostly Clear
7%
22°
38°
Thu
9/3
Partly Cloudy
43%
21°
36°
Fri
9/4
Fog
44%
22°
36°
Sat
9/5
Clear
35%
23°
36°
Sun
9/6
Clear
19%
21°
34°
Mon
9/7
Clear
19%
18°
33°
Tue
9/8
Clear
60%
17°
34°
Wed
9/9
Drizzle
60%
19°
34°
Thu
9/10
Drizzle
60%
17°
32°
Fri
9/11
Drizzle
60%
18°
31°
Sat
9/12
Drizzle
60%
16°
29°
Sun
9/13
Drizzle
60%
16°
28°
Mon
9/14
Drizzle
60%
16°
28°
58
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
58 AQI 13.0 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 58 Moderate 38 58
Wed 61 Moderate 41 61
Thu 53 Moderate 40 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 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
SBCAPE1298 J/kg
MLCAPE1090 J/kg
MUCAPE1901 J/kg
SBCIN-469 J/kg
MLCIN-309 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear33 kt
0–1 km Shear26 kt
Eff. Shear20 kt
0–1 km SRH163
0–3 km SRH131
Eff. SRH-3
Storm Motion298° @ 25 kt
0–1 km EHI1.3
Composite Parameters
Sig. Tornado0.8
STP (eff)0.0
Supercell0.0
K-Index36.6
Thermo & Levels
PWAT1.81 in
0–3 km LR4.4 °C/km
700–500 LR6.8 °C/km
Total Totals48.0
LCL941 hPa
LFC660 hPa
EL174 hPa
Freezing Lvl15,364 ft