Excessive Heat Watch 12:00 AM Heat Advisory — Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO 10:00 PM Excessive Heat Warning — 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, Ste. Genevieve, MO, 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, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Marion County, Missouri, United States

Last updated: 6:55 PM CDT  ·  Refresh
32°C
Feels like 38°
Mostly Clear
▲ 33°  /  ▼ 23°
Wind
9 mph SSW
Humidity
65%
Dew Point
24°
Pressure
29.29 inHg
Visibility
10 mi
UV Index
4.1
Cloud Cover
22%
Sunrise
5:42 AM
Sunset
8:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marion County is currently mostly clear at 32°C. Precipitation is likely — peak probability 51% around 8 PM. Atmospheric instability is elevated (CAPE up to 3525 J/kg) — isolated convective development possible. Sunrise: 5:42AM · Sunset: 8:38PM.

Alerts

Excessive Heat Watch
Expires 12:00 AM
Heat Advisory
Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO
Expires 10:00 PM
Excessive Heat Warning
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, Ste. Genevieve, MO, 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, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
26%
7 PM
31°
45%
8 PM
29°
50%
9 PM
27°
42%
10 PM
27°
43%
11 PM
26°
44%
12 AM
26°
32%
1 AM
25°
16%
2 AM
25°
16%
3 AM
24°
16%
4 AM
24°
16%
5 AM
23°
17%
6 AM
23°
17%
7 AM
25°
20%
8 AM
27°
28%
9 AM
28°
32%
10 AM
29°
26%
11 AM
29°
21%
12 PM
30°
18%
1 PM
32°
18%
2 PM
32°
18%
3 PM
32°
18%
4 PM
32°
24%
5 PM
32°
24%
7-Day Forecast
Tonight
33° 23°
Mostly Clear with a 42% chance of rain.
Fri
33° 23°
Partly Cloudy with a 32% chance of rain.
Sat
32° 22°
Partly Cloudy with a 38% chance of rain.
Sun
31° 20°
Partly Cloudy with a 77% chance of rain.
Mon
29° 19°
Drizzle, 51% chance.
Tue
29° 19°
Drizzle, 51% chance.
Wed
31° 20°
Clear with a 42% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Clear 26% 9 mph SSW 65%
7 PM 31° Partly Cloudy 45% 8 mph S 71%
8 PM 29° Partly Cloudy 50% 9 mph S 76%
9 PM 27° Partly Cloudy 42% 10 mph S 81%
10 PM 27° Partly Cloudy 43% 9 mph S 83%
11 PM 26° Partly Cloudy 44% 8 mph S 84%
12 AM 26° Partly Cloudy 32% 7 mph SSW 86%
1 AM 25° Partly Cloudy 16% 6 mph SSW 87%
2 AM 25° Partly Cloudy 16% 7 mph SSW 88%
3 AM 24° Partly Cloudy 16% 6 mph SSW 89%
4 AM 24° Mostly Clear 16% 6 mph SSW 90%
5 AM 23° Partly Cloudy 17% 6 mph SSW 90%
6 AM 23° Partly Cloudy 17% 6 mph SSW 90%
7 AM 25° Mostly Cloudy 20% 7 mph SSW 84%
8 AM 27° Mostly Cloudy 28% 7 mph SW 78%
9 AM 28° Mostly Cloudy 32% 8 mph SW 72%
10 AM 29° Partly Cloudy 26% 7 mph SW 72%
11 AM 29° Partly Cloudy 21% 7 mph SW 70%
12 PM 30° Partly Cloudy 18% 8 mph SSW 68%
1 PM 32° Partly Cloudy 18% 8 mph SSW 65%
2 PM 32° Partly Cloudy 18% 8 mph SSW 63%
3 PM 32° Mostly Cloudy 18% 8 mph SSW 61%
4 PM 32° Partly Cloudy 24% 8 mph SSW 63%
5 PM 32° Partly Cloudy 24% 7 mph SSW 66%
15-Day Forecast
Today
7/2
Mostly Clear
42%
23°
33°
Fri
7/3
Partly Cloudy
32%
23°
33°
Sat
7/4
Partly Cloudy
38%
22°
32°
Sun
7/5
Partly Cloudy
77%
20°
31°
Mon
7/6
Drizzle
51%
19°
29°
Tue
7/7
Drizzle
51%
19°
29°
Wed
7/8
Clear
42%
20°
31°
Thu
7/9
Rain
48%
21°
31°
Fri
7/10
Rain
69%
21°
30°
Sat
7/11
Thunderstorm
68%
20°
32°
Sun
7/12
Drizzle
64%
19°
27°
Mon
7/13
Drizzle
60%
18°
28°
Tue
7/14
Drizzle
60%
18°
28°
Wed
7/15
Drizzle
60%
18°
29°
Thu
7/16
Drizzle
60%
19°
30°
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 8.8 µg/m³
O3
Ground-level ozone
29 AQI 32 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 48 Good 29 48
Sat 58 Moderate 31 58
Sun 59 Moderate 30 59
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 Thu Jul 2, 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
SBCAPE3527 J/kg
MLCAPE2883 J/kg
MUCAPE3527 J/kg
SBCIN-48 J/kg
MLCIN0 J/kg
Lifted Index-8.1
Kinematics
0–6 km Shear26 kt
0–1 km Shear9 kt
Eff. Shear28 kt
0–1 km SRH12
0–3 km SRH-42
Eff. SRH-42
Storm Motion201° @ 32 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.0
K-Index35.9
Thermo & Levels
PWAT2.00 in
0–3 km LR7.0 °C/km
700–500 LR6.5 °C/km
Total Totals51.6
LCL878 hPa
LFC845 hPa
EL143 hPa
Freezing Lvl15,128 ft