Freeze Warning — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Madison, IL, St. Clair, IL, Monroe, IL, 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, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 8:00 AM

Saint Louis, Missouri

Last updated: 2:05 PM CDT  ·  Refresh
11°C
Feels like 8°
Mostly Cloudy
▲ 12°  /  ▼ 2°
Wind
8 mph NNW
Humidity
65%
Dew Point
5°
Pressure
29.68 inHg
Visibility
9 mi
UV Index
3.8
Cloud Cover
77%
Sunrise
6:31 AM
Sunset
4:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Louis is currently mostly cloudy at 11°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:31AM · Sunset: 4:55PM.

Alerts

Freeze Warning
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Madison, IL, St. Clair, IL, Monroe, IL, 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, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 AM
24 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
11°
0%
3 PM
12°
0%
4 PM
12°
0%
5 PM
10°
0%
6 PM
9°
0%
7 PM
8°
0%
8 PM
7°
0%
9 PM
7°
0%
10 PM
6°
0%
11 PM
5°
0%
12 AM
4°
0%
1 AM
4°
0%
2 AM
4°
0%
3 AM
3°
0%
4 AM
2°
0%
5 AM
2°
0%
6 AM
2°
0%
7 AM
2°
0%
8 AM
3°
0%
9 AM
5°
0%
10 AM
6°
0%
11 AM
7°
0%
12 PM
8°
0%
1 PM
11°
0%
7-Day Forecast
Today
12° 2°
Mostly Cloudy.
Sat
12° 2°
Partly Cloudy.
Sun
17° 4°
Mostly Clear.
Mon
19° 8°
Clear.
Tue
18° 8°
Clear.
Wed
16° 7°
Partly Cloudy with a 40% chance of rain.
Thu
12° 3°
Mostly Cloudy with a 36% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 11° Mostly Cloudy 0% 8 mph NNW 65%
3 PM 12° Mostly Cloudy 0% 8 mph NNW 64%
4 PM 12° Mostly Cloudy 0% 8 mph NNW 64%
5 PM 10° Partly Cloudy 0% 7 mph N 67%
6 PM 9° Partly Cloudy 0% 6 mph N 71%
7 PM 8° Mostly Clear 0% 5 mph N 74%
8 PM 7° Mostly Clear 0% 4 mph N 77%
9 PM 7° Mostly Clear 0% 4 mph N 79%
10 PM 6° Mostly Clear 0% 4 mph NNW 82%
11 PM 5° Clear 0% 4 mph NNW 84%
12 AM 4° Clear 0% 3 mph NNW 87%
1 AM 4° Clear 0% 3 mph NNW 87%
2 AM 4° Clear 0% 3 mph NW 88%
3 AM 3° Clear 0% 3 mph NW 89%
4 AM 2° Mostly Clear 0% 2 mph NW 89%
5 AM 2° Mostly Clear 0% 2 mph NW 89%
6 AM 2° Mostly Clear 0% 2 mph NW 90%
7 AM 2° Partly Cloudy 0% 3 mph NW 89%
8 AM 3° Partly Cloudy 0% 3 mph NW 86%
9 AM 5° Partly Cloudy 0% 3 mph NNW 78%
10 AM 6° Partly Cloudy 0% 4 mph NW 71%
11 AM 7° Partly Cloudy 0% 4 mph NW 66%
12 PM 8° Partly Cloudy 0% 4 mph NW 62%
1 PM 11° Mostly Cloudy 0% 4 mph NW 55%
15-Day Forecast
Today
11/6
Mostly Cloudy
0%
2°
12°
Sat
11/7
Partly Cloudy
0%
2°
12°
Sun
11/8
Mostly Clear
3%
4°
17°
Mon
11/9
Clear
3%
8°
19°
Tue
11/10
Clear
3%
8°
18°
Wed
11/11
Partly Cloudy
40%
7°
16°
Thu
11/12
Mostly Cloudy
36%
3°
12°
Fri
11/13
Mostly Cloudy
30%
1°
8°
Sat
11/14
Mostly Clear
24%
-2°
9°
Sun
11/15
Mostly Cloudy
49%
-1°
12°
Mon
11/16
Overcast
86%
4°
14°
Tue
11/17
Drizzle
81%
8°
14°
Wed
11/18
Drizzle
81%
7°
14°
Thu
11/19
Drizzle
70%
7°
13°
Fri
11/20
Drizzle
73%
7°
12°
24
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
14 AQI 2.5 µg/m³
O3
Ground-level ozone
Dominant
24 AQI 27 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 24 Good 24 14
Sun 53 Moderate 17 53
Mon 60 Moderate 19 60
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 Fri Nov 6, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE55 J/kg
MLCAPE16 J/kg
MUCAPE0 J/kg
SBCIN0 J/kg
MLCIN-1 J/kg
Lifted Index12.2
Kinematics
0–6 km Shear17 kt
0–1 km Shear7 kt
Eff. Shear—
0–1 km SRH21
0–3 km SRH38
Eff. SRH—
Storm Motion356° @ 27 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-19.6
Thermo & Levels
PWAT0.40 in
0–3 km LR2.9 °C/km
700–500 LR7.7 °C/km
Total Totals30.4
LCL919 hPa
LFC1005 hPa
EL846 hPa
Freezing Lvl3,829 ft