Saint Louis, Missouri

Last updated: 7:44 AM CDT · Refresh

26°C

Feels like 32°

Mostly Cloudy

▲ 38° / ▼ 24°

Wind

2 mph SW

Humidity

91%

Dew Point

25°

Pressure

29.45 inHg

Visibility

4 mi

UV Index

3.0

Cloud Cover

79%

Sunrise

5:57 AM

Sunset

8:16 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Saint Louis is currently mostly cloudy at 26°C. Precipitation is likely — peak probability 56% around 7 PM. Atmospheric instability is elevated (CAPE up to 4055 J/kg) — isolated convective development possible. Sunrise: 5:57AM · Sunset: 8:16PM.

56 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

26°

45%

8 AM

28°

40%

9 AM

30°

32%

10 AM

32°

31%

11 AM

33°

36%

12 PM

34°

36%

1 PM

36°

35%

2 PM

37°

35%

3 PM

38°

35%

4 PM

37°

47%

5 PM

36°

53%

6 PM

33°

53%

7 PM

32°

56%

8 PM

30°

34%

9 PM

28°

29%

10 PM

28°

17%

11 PM

28°

17%

12 AM

27°

1 AM

27°

2 AM

26°

3 AM

26°

4 AM

26°

5 AM

26°

6 AM

26°

7-Day Forecast

Today

38° 24°

Partly Cloudy with a 56% chance of rain.

Mon

39° 24°

Partly Cloudy with a 30% chance of rain.

Tue

36° 23°

Mostly Clear with a 26% chance of rain.

Wed

32° 20°

Mostly Clear with a 32% chance of rain.

Thu

32° 19°

Rain, 29% chance.

Fri

30° 21°

Rain, 82% chance.

Sat

31° 18°

Drizzle, 53% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 26° Mostly Cloudy 45% 2 mph SW 91%

8 AM 28° Partly Cloudy 40% 3 mph WSW 82%

9 AM 30° Mostly Clear 32% 3 mph WSW 74%

10 AM 32° Mostly Clear 31% 4 mph WSW 69%

11 AM 33° Mostly Clear 36% 6 mph WSW 65%

12 PM 34° Partly Cloudy 36% 7 mph SW 61%

1 PM 36° Partly Cloudy 35% 6 mph WSW 57%

2 PM 37° Partly Cloudy 35% 6 mph WSW 53%

3 PM 38° Partly Cloudy 35% 7 mph W 49%

4 PM 37° Partly Cloudy 47% 6 mph WSW 51%

5 PM 36° Mostly Cloudy 53% 7 mph WSW 56%

6 PM 33° Overcast 53% 8 mph SSW 62%

7 PM 32° Mostly Cloudy 56% 7 mph SSE 65%

8 PM 30° Partly Cloudy 34% 6 mph S 68%

9 PM 28° Mostly Clear 29% 7 mph S 70%

10 PM 28° Mostly Clear 17% 6 mph S 71%

11 PM 28° Mostly Clear 17% 5 mph SSW 72%

12 AM 27° Mostly Clear 8% 5 mph SSW 72%

1 AM 27° Mostly Clear 3% 5 mph SSW 75%

2 AM 26° Partly Cloudy 3% 5 mph S 79%

3 AM 26° Partly Cloudy 9% 5 mph S 83%

4 AM 26° Partly Cloudy 9% 5 mph S 84%

5 AM 26° Partly Cloudy 9% 5 mph SSE 85%

6 AM 26° Partly Cloudy 9% 5 mph SE 86%

15-Day Forecast

Today

7/26

Partly Cloudy

56%

24°

38°

Mon

7/27

Partly Cloudy

30%

24°

39°

Tue

7/28

Mostly Clear

26%

23°

36°

Wed

7/29

Mostly Clear

32%

20°

32°

Thu

7/30

Rain

29%

19°

32°

Fri

7/31

Rain

82%

21°

30°

Sat

8/1

Drizzle

53%

18°

31°

Sun

8/2

Drizzle

42%

20°

31°

Mon

8/3

Drizzle

44%

20°

32°

Tue

8/4

Drizzle

51%

22°

34°

Wed

8/5

Drizzle

60%

22°

34°

Thu

8/6

Drizzle

60%

21°

33°

Fri

8/7

Drizzle

60%

21°

32°

Sat

8/8

Drizzle

60%

21°

34°

Sun

8/9

Drizzle

60%

22°

34°

Moderate

U.S. Air Quality Index · Dominant: PM2.5

50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

Dominant

56 AQI 11.8 µg/m³

O₃

Ground-level ozone

50 AQI 54 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Mon 56 Moderate 50 56

Tue 53 Moderate 44 53

Wed 51 Moderate 51 43

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Sun Jul 26, 11:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE2450 J/kg

MLCAPE2566 J/kg

MUCAPE3264 J/kg

SBCIN-160 J/kg

MLCIN0 J/kg

Lifted Index-4.6

Kinematics

0–6 km Shear13 kt

0–1 km Shear14 kt

Eff. Shear24 kt

0–1 km SRH0

0–3 km SRH-13

Eff. SRH-13

Storm Motion301° @ 23 kt

0–1 km EHI0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index32.7

Thermo & Levels

PWAT1.83 in

0–3 km LR4.7 °C/km

700–500 LR5.8 °C/km

Total Totals46.6

LCL976 hPa

LFC732 hPa

EL167 hPa

Freezing Lvl16,850 ft

Saint Louis, Missouri

Alerts