Knox County, Illinois, United States

Last updated: 7:12 PM CDT  ·  Refresh
26°C
Feels like 28°
Partly Cloudy
▲ 28°  /  ▼ 18°
Wind
8 mph N
Humidity
86%
Dew Point
22°
Pressure
29.18 inHg
Visibility
10 mi
UV Index
3.3
Cloud Cover
39%
Sunrise
5:34 AM
Sunset
8:36 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Knox County is currently partly cloudy at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1833 J/kg) — isolated convective development possible. Sunrise: 5:34AM · Sunset: 8:36PM.

Alerts

No active alerts for this location.
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
26%
8 PM
26°
34%
9 PM
23°
34%
10 PM
23°
26%
11 PM
22°
19%
12 AM
22°
19%
1 AM
21°
10%
2 AM
20°
7%
3 AM
20°
19%
4 AM
20°
5%
5 AM
18°
5%
6 AM
18°
5%
7 AM
19°
13%
8 AM
20°
21%
9 AM
23°
24%
10 AM
23°
14%
11 AM
24°
23%
12 PM
24°
26%
1 PM
26°
34%
2 PM
27°
34%
3 PM
27°
24%
4 PM
27°
24%
5 PM
28°
27%
6 PM
27°
15%
7-Day Forecast
Tonight
28° 18°
Partly Cloudy with a 26% chance of rain.
Sun
28° 18°
Mostly Cloudy with a 34% chance of rain.
Mon
29° 17°
Clear with a 26% chance of rain.
Tue
29° 16°
Haze.
Wed
29° 17°
Mostly Clear with a 30% chance of rain.
Thu
26° 19°
Rain, 82% chance.
Fri
27° 18°
Rain, 64% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 26% 8 mph N 86%
8 PM 26° Partly Cloudy 34% 6 mph NE 90%
9 PM 23° Mostly Cloudy 34% 4 mph NE 92%
10 PM 23° Mostly Cloudy 26% 4 mph NNE 94%
11 PM 22° Mostly Cloudy 19% 2 mph NNE 94%
12 AM 22° Mostly Cloudy 19% 4 mph N 95%
1 AM 21° Mostly Cloudy 10% 4 mph N 96%
2 AM 20° Overcast 7% 4 mph N 95%
3 AM 20° Overcast 19% 5 mph NNE 95%
4 AM 20° Overcast 5% 4 mph NNE 95%
5 AM 18° Overcast 5% 4 mph NE 95%
6 AM 18° Overcast 5% 4 mph NNE 95%
7 AM 19° Fog 13% 4 mph NNE 95%
8 AM 20° Overcast 21% 5 mph NNE 92%
9 AM 23° Overcast 24% 6 mph NNE 88%
10 AM 23° Overcast 14% 6 mph NNE 83%
11 AM 24° Overcast 23% 6 mph NNE 80%
12 PM 24° Overcast 26% 7 mph N 78%
1 PM 26° Overcast 34% 7 mph N 76%
2 PM 27° Overcast 34% 7 mph NNE 76%
3 PM 27° Overcast 24% 7 mph NNE 75%
4 PM 27° Mostly Cloudy 24% 8 mph NNE 75%
5 PM 28° Partly Cloudy 27% 7 mph NNE 77%
6 PM 27° Partly Cloudy 15% 7 mph NNE 79%
15-Day Forecast
Today
7/4
Partly Cloudy
26%
18°
28°
Sun
7/5
Mostly Cloudy
34%
18°
28°
Mon
7/6
Clear
26%
17°
29°
Tue
7/7
Haze
15%
16°
29°
Wed
7/8
Mostly Clear
30%
17°
29°
Thu
7/9
Rain
82%
19°
26°
Fri
7/10
Rain
64%
18°
27°
Sat
7/11
Partly Cloudy
53%
17°
26°
Sun
7/12
Drizzle
43%
14°
27°
Mon
7/13
Drizzle
51%
16°
28°
Tue
7/14
Drizzle
51%
17°
29°
Wed
7/15
Drizzle
60%
17°
28°
Thu
7/16
Drizzle
60%
17°
25°
Fri
7/17
Drizzle
60%
16°
26°
Sat
7/18
Drizzle
60%
17°
26°
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 9.9 µg/m³
O3
Ground-level ozone
37 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 37 52
Mon 45 Good 33 45
Tue 56 Moderate 35 56
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 Sat Jul 4, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1154 J/kg
MLCAPE1128 J/kg
MUCAPE1509 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-3.7
Kinematics
0–6 km Shear19 kt
0–1 km Shear10 kt
Eff. Shear19 kt
0–1 km SRH-47
0–3 km SRH-44
Eff. SRH-44
Storm Motion236° @ 11 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.0
Thermo & Levels
PWAT1.68 in
0–3 km LR6.1 °C/km
700–500 LR5.3 °C/km
Total Totals43.8
LCL937 hPa
LFC988 hPa
EL195 hPa
Freezing Lvl14,534 ft