Extreme Heat Warning — Clinton, IL, Washington, IL, Randolph, IL, Madison, IL, St. Clair, IL, Monroe, IL, Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO 8:00 PM Heat Advisory — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Knox County, Missouri, United States

Last updated: 5:14 AM CDT  ·  Refresh
24°C
Feels like 26°
Mostly Clear
▲ 34°  /  ▼ 23°
Wind
8 mph SSW
Humidity
75%
Dew Point
21°
Pressure
29.09 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
25%
Sunrise
6:16 AM
Sunset
8:10 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 3604 J/kg) — isolated convective development possible. Sunrise: 6:16AM · Sunset: 8:10PM.

Alerts

Extreme Heat Warning
Clinton, IL, Washington, IL, Randolph, IL, Madison, IL, St. Clair, IL, Monroe, IL, Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO
Expires 8:00 PM
Heat Advisory
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Marion, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
7%
6 AM
24°
23%
7 AM
25°
20%
8 AM
27°
24%
9 AM
27°
24%
10 AM
28°
33%
11 AM
30°
21%
12 PM
31°
21%
1 PM
32°
9%
2 PM
33°
18%
3 PM
34°
21%
4 PM
34°
22%
5 PM
34°
22%
6 PM
34°
27%
7 PM
33°
28%
8 PM
31°
28%
9 PM
29°
22%
10 PM
27°
22%
11 PM
27°
22%
12 AM
26°
26%
1 AM
26°
26%
2 AM
26°
27%
3 AM
26°
24%
4 AM
24°
37%
7-Day Forecast
Today
34° 23°
Partly Cloudy with a 28% chance of rain.
Wed
34° 23°
Partly Cloudy with a 49% chance of rain.
Thu
32° 22°
Partly Cloudy with a 86% chance of rain.
Fri
30° 19°
Overcast with a 52% chance of rain.
Sat
36° 23°
Partly Cloudy with a 29% chance of rain.
Sun
32° 19°
Drizzle, 53% chance.
Mon
30° 18°
Clear with a 49% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 7% 8 mph SSW 75%
6 AM 24° Mostly Cloudy 23% 10 mph SW 68%
7 AM 25° Mostly Cloudy 20% 11 mph SW 68%
8 AM 27° Mostly Cloudy 24% 12 mph SW 65%
9 AM 27° Mostly Cloudy 24% 13 mph SW 61%
10 AM 28° Mostly Cloudy 33% 14 mph SW 58%
11 AM 30° Partly Cloudy 21% 15 mph SW 55%
12 PM 31° Partly Cloudy 21% 15 mph SW 52%
1 PM 32° Partly Cloudy 9% 14 mph SW 49%
2 PM 33° Partly Cloudy 18% 14 mph SW 48%
3 PM 34° Partly Cloudy 21% 14 mph SW 48%
4 PM 34° Partly Cloudy 22% 14 mph SW 48%
5 PM 34° Partly Cloudy 22% 12 mph SW 52%
6 PM 34° Partly Cloudy 27% 10 mph SW 55%
7 PM 33° Partly Cloudy 28% 9 mph SW 60%
8 PM 31° Partly Cloudy 28% 6 mph SSW 67%
9 PM 29° Partly Cloudy 22% 5 mph S 74%
10 PM 27° Partly Cloudy 22% 5 mph SSE 80%
11 PM 27° Partly Cloudy 22% 6 mph SSE 82%
12 AM 26° Partly Cloudy 26% 6 mph SSE 83%
1 AM 26° Partly Cloudy 26% 6 mph SSE 84%
2 AM 26° Partly Cloudy 27% 6 mph SSE 85%
3 AM 26° Partly Cloudy 24% 5 mph SSE 87%
4 AM 24° Partly Cloudy 37% 6 mph SSE 87%
15-Day Forecast
Today
8/11
Partly Cloudy
28%
23°
34°
Wed
8/12
Partly Cloudy
49%
23°
34°
Thu
8/13
Partly Cloudy
86%
22°
32°
Fri
8/14
Overcast
52%
19°
30°
Sat
8/15
Partly Cloudy
29%
23°
36°
Sun
8/16
Drizzle
53%
19°
32°
Mon
8/17
Clear
49%
18°
30°
Tue
8/18
Mostly Clear
34%
19°
36°
Wed
8/19
Mostly Clear
35%
21°
36°
Thu
8/20
Mostly Clear
35%
22°
41°
Fri
8/21
Drizzle
60%
20°
41°
Sat
8/22
Clear
60%
20°
34°
Sun
8/23
Drizzle
60%
19°
32°
Mon
8/24
Drizzle
60%
18°
31°
Tue
8/25
Drizzle
60%
18°
29°
48
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
48 AQI 8.7 µg/m³
O3
Ground-level ozone
41 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 41 48
Wed 40 Good 40 29
Thu 44 Good 39 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 Tue Aug 11, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1231 J/kg
MLCAPE1437 J/kg
MUCAPE2056 J/kg
SBCIN-643 J/kg
MLCIN0 J/kg
Lifted Index-4.7
Kinematics
0–6 km Shear19 kt
0–1 km Shear19 kt
Eff. Shear—
0–1 km SRH143
0–3 km SRH154
Eff. SRH—
Storm Motion326° @ 12 kt
0–1 km EHI1.1
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index29.0
Thermo & Levels
PWAT1.42 in
0–3 km LR4.1 °C/km
700–500 LR7.9 °C/km
Total Totals51.1
LCL933 hPa
LFC640 hPa
EL198 hPa
Freezing Lvl14,498 ft