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

Marion County, Missouri, United States

Last updated: 5:14 AM CDT  ·  Refresh
25°C
Feels like 27°
Mostly Clear
▲ 34°  /  ▼ 24°
Wind
7 mph SSW
Humidity
76%
Dew Point
22°
Pressure
29.24 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
27%
Sunrise
6:14 AM
Sunset
8:07 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marion County is currently mostly clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3692 J/kg) — isolated convective development possible. Sunrise: 6:14AM · Sunset: 8:07PM.

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
46 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
7%
6 AM
24°
21%
7 AM
24°
20%
8 AM
26°
20%
9 AM
27°
23%
10 AM
28°
23%
11 AM
29°
31%
12 PM
31°
20%
1 PM
32°
7%
2 PM
33°
16%
3 PM
33°
20%
4 PM
34°
20%
5 PM
34°
20%
6 PM
34°
21%
7 PM
33°
21%
8 PM
31°
21%
9 PM
29°
22%
10 PM
28°
22%
11 PM
27°
22%
12 AM
26°
23%
1 AM
26°
23%
2 AM
26°
24%
3 AM
26°
24%
4 AM
25°
37%
7-Day Forecast
Today
34° 24°
Mostly Cloudy with a 31% chance of rain.
Wed
35° 24°
Mostly Clear with a 60% chance of rain.
Thu
33° 23°
Partly Cloudy with a 80% chance of rain.
Fri
31° 20°
Overcast with a 49% chance of rain.
Sat
36° 23°
Partly Cloudy.
Sun
33° 20°
Drizzle, 49% chance.
Mon
31° 18°
Clear with a 47% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 25° Mostly Clear 7% 7 mph SSW 76%
6 AM 24° Partly Cloudy 21% 8 mph SSW 72%
7 AM 24° Mostly Cloudy 20% 8 mph SW 72%
8 AM 26° Mostly Cloudy 20% 10 mph SW 67%
9 AM 27° Mostly Cloudy 23% 12 mph SW 62%
10 AM 28° Mostly Cloudy 23% 13 mph SW 59%
11 AM 29° Partly Cloudy 31% 13 mph SW 56%
12 PM 31° Partly Cloudy 20% 14 mph SW 53%
1 PM 32° Partly Cloudy 7% 14 mph SW 51%
2 PM 33° Partly Cloudy 16% 14 mph SW 50%
3 PM 33° Partly Cloudy 20% 14 mph SW 49%
4 PM 34° Mostly Cloudy 20% 13 mph SW 49%
5 PM 34° Partly Cloudy 20% 11 mph SW 52%
6 PM 34° Mostly Cloudy 21% 9 mph SW 55%
7 PM 33° Mostly Cloudy 21% 7 mph SW 60%
8 PM 31° Partly Cloudy 21% 6 mph SSW 67%
9 PM 29° Partly Cloudy 22% 6 mph S 72%
10 PM 28° Partly Cloudy 22% 6 mph S 78%
11 PM 27° Partly Cloudy 22% 6 mph S 80%
12 AM 26° Mostly Clear 23% 6 mph S 82%
1 AM 26° Mostly Clear 23% 6 mph S 84%
2 AM 26° Mostly Clear 24% 6 mph S 84%
3 AM 26° Partly Cloudy 24% 6 mph S 83%
4 AM 25° Mostly Clear 37% 5 mph S 83%
15-Day Forecast
Today
8/11
Mostly Cloudy
31%
24°
34°
Wed
8/12
Mostly Clear
60%
24°
35°
Thu
8/13
Partly Cloudy
80%
23°
33°
Fri
8/14
Overcast
49%
20°
31°
Sat
8/15
Partly Cloudy
15%
23°
36°
Sun
8/16
Drizzle
49%
20°
33°
Mon
8/17
Clear
47%
18°
31°
Tue
8/18
Mostly Clear
34%
19°
36°
Wed
8/19
Mostly Cloudy
35%
22°
36°
Thu
8/20
Mostly Clear
35%
22°
41°
Fri
8/21
Drizzle
60%
20°
41°
Sat
8/22
Drizzle
60%
20°
34°
Sun
8/23
Drizzle
60%
19°
33°
Mon
8/24
Drizzle
60%
18°
31°
Tue
8/25
Drizzle
60%
19°
30°
46
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
46 AQI 8.3 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 46 Good 32 46
Wed 33 Good 33 26
Thu 44 Good 36 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
SBCAPE1415 J/kg
MLCAPE1573 J/kg
MUCAPE2043 J/kg
SBCIN-591 J/kg
MLCIN0 J/kg
Lifted Index-4.9
Kinematics
0–6 km Shear16 kt
0–1 km Shear20 kt
Eff. Shear—
0–1 km SRH148
0–3 km SRH141
Eff. SRH—
Storm Motion327° @ 13 kt
0–1 km EHI1.3
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index28.7
Thermo & Levels
PWAT1.46 in
0–3 km LR4.2 °C/km
700–500 LR7.8 °C/km
Total Totals51.4
LCL941 hPa
LFC650 hPa
EL191 hPa
Freezing Lvl14,590 ft