St Louis Weather Conditions and Forecast, December 16, 2017

St Louis Weather Conditions and Forecast, December 17, 2017

St Louis Weather Conditions, Forecast & Air Quality Index readings published by STL.News

ST LOUIS, MO/December 17, 2017 (STL.News) St Louis weather conditions & forecast readings from the St. Louis Lambert International Airport at 3:51 a.m at Latitude: 38.75°N, Longitude: 90.37°W – Elevation 604 feet. Forecast is provided by the National Weather Service (N.W.S.).

Current Weather Conditions


Temperature: 45°F – 7°C
Humidity: 56%
Wind Speed: S 3 mph
Barometer: 30.08 in (1015.7 MB)
Dew-point: 30°F – -1°C
Visibility: 10 Miles
Wind Chill: N/A°F – N/A°C
Heat Index: N/A°F – N/A°C

Extended Weather Forecast for the St Louis, Missouri area beginning December 17, 2017

Overnight: 20 percent chance of rain, cloudy – low around 40 with south wind around 6 mph.
Sunday: Cloudy – high near 48 with south wind 5 to 7 mph with chance of precipitation – 70%.
Sunday Night: Cloudy – low around 43 with southwest wind around 6 mph.
Monday: Patchy fog before 9 am, otherwise, partly sunny – high near 57 with southwest wind 5 to 8 mph.
Monday Night: Partly cloudy – low around 43 with southwest wind around 6 mph.
Tuesday: Mostly sunny – high near 60.
Tuesday Night: Partly cloudy – low around 35.
Wednesday: Sunny – high near 51.
Wednesday Night: Mostly clear – low around 34.
Thursday: Mostly sunny – high near 57.
Thursday Night: 20 percent chance of rain, mostly cloudy – low around 39.
Friday: Partly sunny – high near 45.
Friday Night: Mostly cloudy – low around 26.
Saturday: Partly sunny – high near 39.

Air Quality Index for Saint Louis, Missouri – (A.Q.I.)

Delayed Air Quality Index: 12/16/17 7:00 PM CST

  • Good – 29 AQI – Ozone
  • Good – 21 AQI – Particle Pollution (2.5 microns)
  • Good – 15 AQI – Particle Pollution (10 microns)

Agency: St. Louis Metropolitan Area (American Lung Association)

Air Quality Index (A.Q.I.)

Good – Air quality in considered “satisfactory” and air pollution poses little to no threat.

Moderate – Air quality is considered “acceptable.” However, some pollutants there may be a moderate health concern for a very small number of people who are sensitive to air pollution.

USG – while the general public will not likely be affected by this AQI range, people with lung disease, older adults and children are a great risk from exposure to ozone, whereas, persons with heart and lung disease, old adults and children are at greater risk from the presence of particles in the air.

Unhealthy – Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.

Very Unhealthy – Health Alert: everyone may experience more serious health effects.


Source: Current Weather Conditions and Forecast are obtained from the National Weather Service @ Forecast.Weather.Gov – Air Quality Index (AQI) readings are obtained from AirNow.Gov – (MS)


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