Saint Charles County, Missouri, United States

Last updated: 2:10 PM CDT · Refresh

11°C

Feels like 7°

Mostly Cloudy

▲ 11° / ▼ 1°

Wind

8 mph NNW

Humidity

67%

Dew Point

5°

Pressure

29.60 inHg

Visibility

9 mi

UV Index

3.8

Cloud Cover

76%

Sunrise

6:34 AM

Sunset

4:56 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Saint Charles County is currently mostly cloudy at 11°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:34AM · Sunset: 4:56PM.

27 AQI · Good Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

11°

3 PM

11°

4 PM

11°

5 PM

10°

6 PM

9°

7 PM

8°

8 PM

7°

9 PM

7°

10 PM

6°

11 PM

5°

12 AM

5°

1 AM

4°

2 AM

4°

3 AM

3°

4 AM

2°

5 AM

1°

6 AM

1°

7 AM

2°

8 AM

3°

9 AM

4°

10 AM

6°

11 AM

7°

12 PM

8°

1 PM

9°

7-Day Forecast

Today

11° 1°

Mostly Cloudy.

Sat

12° 1°

Partly Cloudy.

Sun

18° 3°

Clear.

Mon

20° 8°

Clear.

Tue

18° 8°

Clear.

Wed

16° 7°

Partly Cloudy with a 39% chance of rain.

Thu

12° 2°

Overcast with a 34% chance of rain.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 11° Mostly Cloudy 0% 8 mph NNW 67%

3 PM 11° Mostly Cloudy 0% 8 mph NNW 64%

4 PM 11° Mostly Cloudy 0% 7 mph NNW 64%

5 PM 10° Partly Cloudy 0% 6 mph N 67%

6 PM 9° Partly Cloudy 0% 6 mph N 69%

7 PM 8° Partly Cloudy 0% 5 mph NNW 74%

8 PM 7° Partly Cloudy 0% 4 mph NNW 77%

9 PM 7° Partly Cloudy 0% 4 mph NNW 79%

10 PM 6° Mostly Clear 0% 4 mph NNW 82%

11 PM 5° Mostly Clear 0% 4 mph NNW 84%

12 AM 5° Clear 0% 3 mph NNW 86%

1 AM 4° Clear 0% 3 mph NNW 87%

2 AM 4° Mostly Clear 0% 3 mph NW 88%

3 AM 3° Mostly Clear 0% 3 mph NW 89%

4 AM 2° Mostly Clear 0% 3 mph WNW 89%

5 AM 1° Mostly Clear 0% 3 mph WNW 90%

6 AM 1° Mostly Clear 0% 3 mph WNW 91%

7 AM 2° Partly Cloudy 0% 3 mph WNW 89%

8 AM 3° Partly Cloudy 0% 3 mph NW 86%

9 AM 4° Partly Cloudy 0% 3 mph NW 77%

10 AM 6° Partly Cloudy 0% 3 mph NW 68%

11 AM 7° Partly Cloudy 0% 3 mph NW 64%

12 PM 8° Partly Cloudy 0% 3 mph NW 60%

1 PM 9° Mostly Cloudy 0% 3 mph NW 57%

15-Day Forecast

Today

11/6

Mostly Cloudy

1°

11°

Sat

11/7

Partly Cloudy

1°

12°

Sun

11/8

Clear

3°

18°

Mon

11/9

Clear

8°

20°

Tue

11/10

Clear

8°

18°

Wed

11/11

Partly Cloudy

39%

7°

16°

Thu

11/12

Overcast

34%

2°

12°

Fri

11/13

Mostly Cloudy

14%

0°

8°

Sat

11/14

Partly Cloudy

24%

-2°

9°

Sun

11/15

Mostly Cloudy

49%

-2°

12°

Mon

11/16

Overcast

80%

4°

14°

Tue

11/17

Drizzle

71%

8°

14°

Wed

11/18

Drizzle

78%

7°

14°

Thu

11/19

Drizzle

69%

7°

13°

Fri

11/20

Drizzle

73%

6°

12°

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

PM_2.5

Fine particulate matter

18 AQI 3.2 µg/m³

O₃

Ground-level ozone

Dominant

27 AQI 30 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Sat 27 Good 27 18

Sun 42 Good 23 42

Mon 52 Moderate 26 52

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 Fri Nov 6, 18:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE42 J/kg

MLCAPE13 J/kg

MUCAPE0 J/kg

SBCIN0 J/kg

MLCIN-0 J/kg

Lifted Index12.2

Kinematics

0–6 km Shear17 kt

0–1 km Shear4 kt

Eff. Shear—

0–1 km SRH13

0–3 km SRH34

Eff. SRH—

Storm Motion0° @ 26 kt

0–1 km EHI0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)—

Supercell—

K-Index-16.9

Thermo & Levels

PWAT0.41 in

0–3 km LR2.8 °C/km

700–500 LR7.7 °C/km

Total Totals31.5

LCL925 hPa

LFC1002 hPa

EL846 hPa

Freezing Lvl3,967 ft

Saint Charles County, Missouri, United States

Alerts