Saint Louis, Michigan

Last updated: 5:54 PM CDT  ·  Refresh
32°C
Feels like 34°
Partly Cloudy
▲ 34°  /  ▼ 17°
Wind
8 mph N
Humidity
49%
Dew Point
22°
Pressure
29.18 inHg
Visibility
6 mi
UV Index
4.8
Cloud Cover
43%
Sunrise
6:11 AM
Sunset
9:16 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Louis is currently partly cloudy at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2123 J/kg) — isolated convective development possible. Sunrise: 6:11AM · Sunset: 9:16PM.

Alerts

No active alerts for this location.
162 AQI · Unhealthy Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
3%
7 PM
32°
23%
8 PM
31°
16%
9 PM
27°
16%
10 PM
25°
16%
11 PM
23°
16%
12 AM
22°
16%
1 AM
21°
3%
2 AM
20°
3%
3 AM
19°
3%
4 AM
19°
3%
5 AM
18°
3%
6 AM
18°
3%
7 AM
19°
3%
8 AM
21°
3%
9 AM
23°
3%
10 AM
25°
3%
11 AM
26°
3%
12 PM
27°
3%
1 PM
30°
3%
2 PM
30°
3%
3 PM
31°
3%
4 PM
31°
3%
5 PM
32°
3%
7-Day Forecast
Tonight
34° 17°
Partly Cloudy.
Thu
32° 17°
Partly Cloudy.
Fri
32° 18°
Partly Cloudy.
Sat
30° 15°
Mostly Clear with a 60% chance of rain.
Sun
27° 14°
Partly Cloudy.
Mon
30° 14°
Rain, 81% chance.
Tue
27° 14°
Mostly Cloudy with a 60% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 32° Partly Cloudy 3% 8 mph N 49%
7 PM 32° Mostly Clear 23% 8 mph N 52%
8 PM 31° Partly Cloudy 16% 7 mph N 54%
9 PM 27° Mostly Clear 16% 7 mph N 57%
10 PM 25° Mostly Clear 16% 7 mph N 59%
11 PM 23° Partly Cloudy 16% 6 mph N 62%
12 AM 22° Partly Cloudy 16% 5 mph N 64%
1 AM 21° Partly Cloudy 3% 5 mph N 66%
2 AM 20° Partly Cloudy 3% 5 mph N 68%
3 AM 19° Mostly Clear 3% 5 mph NNW 70%
4 AM 19° Mostly Clear 3% 5 mph NNW 72%
5 AM 18° Mostly Clear 3% 5 mph NNW 72%
6 AM 18° Mostly Clear 3% 5 mph NNW 72%
7 AM 19° Clear 3% 5 mph NNW 70%
8 AM 21° Clear 3% 5 mph NNW 63%
9 AM 23° Partly Cloudy 3% 5 mph N 56%
10 AM 25° Partly Cloudy 3% 5 mph N 49%
11 AM 26° Partly Cloudy 3% 6 mph N 45%
12 PM 27° Partly Cloudy 3% 6 mph NNW 42%
1 PM 30° Partly Cloudy 3% 6 mph NNW 40%
2 PM 30° Partly Cloudy 3% 6 mph NNW 39%
3 PM 31° Partly Cloudy 3% 6 mph NNW 40%
4 PM 31° Partly Cloudy 3% 6 mph NNW 40%
5 PM 32° Partly Cloudy 3% 6 mph NNW 44%
15-Day Forecast
Today
7/15
Partly Cloudy
16%
17°
34°
Thu
7/16
Partly Cloudy
16%
17°
32°
Fri
7/17
Partly Cloudy
16%
18°
32°
Sat
7/18
Mostly Clear
60%
15°
30°
Sun
7/19
Partly Cloudy
8%
14°
27°
Mon
7/20
Rain
81%
14°
30°
Tue
7/21
Mostly Cloudy
60%
14°
27°
Wed
7/22
Clear
9%
13°
26°
Thu
7/23
Drizzle
60%
13°
27°
Fri
7/24
Drizzle
60%
15°
27°
Sat
7/25
Drizzle
60%
16°
28°
Sun
7/26
Drizzle
60%
17°
29°
Mon
7/27
Drizzle
60%
16°
28°
Tue
7/28
Drizzle
60%
16°
28°
Wed
7/29
Drizzle
60%
16°
28°
162
Unhealthy
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Some members of the general public may experience health effects; sensitive groups may experience more serious effects.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
162 AQI 71.5 µg/m³
O3
Ground-level ozone
100 AQI 70 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 162 Unhealthy 100 162
Fri 500 Hazardous 71 500
Sat 451 Hazardous 104 451
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 Wed Jul 15, 21:00'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
SBCAPE2554 J/kg
MLCAPE1875 J/kg
MUCAPE2554 J/kg
SBCIN-90 J/kg
MLCIN0 J/kg
Lifted Index-6.0
Kinematics
0–6 km Shear42 kt
0–1 km Shear6 kt
Eff. Shear44 kt
0–1 km SRH-27
0–3 km SRH-73
Eff. SRH-73
Storm Motion262° @ 26 kt
0–1 km EHI-0.4
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index25.8
Thermo & Levels
PWAT1.54 in
0–3 km LR7.2 °C/km
700–500 LR6.2 °C/km
Total Totals49.8
LCL850 hPa
LFC799 hPa
EL169 hPa
Freezing Lvl15,272 ft