Saint Louis, Missouri Weather Conditions

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Current Conditions

  • 43°
  • Overcast
  • Wind: SE 8 mph
  • Humidity: 65%
  • Visibility: 7.0 miles
  • Dew Point: 32°
  • Pressure: 30.25 in. 0
  • Heat Index: 38

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Next 12 Hours

3  pm
6  pm
9  pm
12  am
3  am
Overcast
Overcast
Overcast
Overcast
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
39°
37°
37°
39°
37°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Overcast
  • High: 43 °
  • Low: 34 °
  • Overcast
  • Sunday
  • Mostly Cloudy
  • High: 45 °
  • Low: 39 °
  • Mostly Cloudy
  • Monday
  • Rain
  • High: 50 °
  • Low: 45 °
  • Rain
  • Tuesday
  • Chance of Rain
  • High: 46 °
  • Low: 34 °
  • Chance of Rain
  • Wednesday
  • Overcast
  • High: 41 °
  • Low: 30 °
  • Overcast

Forecast for Saint Louis, Missouri

Updated: 9:00 AM CST on December 20, 2014

  • Saturday

    Overcast. High of 43F. Winds less than 5 mph.

  • Saturday Night

    Overcast in the evening, then mostly cloudy. Low of 34F. Winds from the SSE at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 45F. Winds from the SSE at 5 to 15 mph.

  • Sunday Night

    Mostly cloudy in the evening, then overcast. Low of 39F. Winds from the SSE at 5 to 10 mph.

  • Monday

    Overcast with a chance of rain. High of 50F. Winds from the SSE at 10 to 15 mph. Chance of rain 50%.

  • Monday Night

    Overcast with rain, then a chance of rain after midnight. Low of 45F. Winds from the South at 5 to 15 mph shifting to the WSW after midnight. Chance of rain 40% with rainfall amounts near 0.2 in. possible.

  • Tuesday

    Overcast with a chance of rain. High of 46F. Winds from the NW at 10 to 15 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Tuesday Night

    Overcast with a chance of rain, then a chance of snow and a chance of rain after midnight. Low of 34F with a windchill as low as 25F. Winds from the NW at 10 to 15 mph. Chance of precipitation 50% .

  • Wednesday

    Overcast with a chance of snow and rain showers. High of 41F. Breezy. Winds from the WNW at 15 to 20 mph.

  • Wednesday Night

    Partly cloudy. Low of 30F with a windchill as low as 23F. Breezy. Winds from the West at 15 to 20 mph.

  • Thursday

    Clear. Fog early. High of 39F with a windchill as low as 23F. Winds from the WSW at 10 to 15 mph.

  • Thursday Night

    Mostly cloudy. Fog overnight. Low of 34F with a windchill as low as 27F. Winds from the SSW at 5 to 10 mph.

  • Friday

    Partly cloudy. High of 41F. Breezy. Winds from the WNW at 15 to 20 mph.

  • Friday Night

    Mostly cloudy. Low of 27F with a windchill as low as 19F. Winds from the WNW at 10 to 15 mph.

  • Saturday

    Partly cloudy. High of 34F with a windchill as low as 16F. Winds from the WNW at 10 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 21F. Winds from the WNW at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 30F. Winds less than 5 mph.

  • Sunday Night

    Mostly cloudy. Fog overnight. Low of 21F. Winds less than 5 mph.

  • Monday

    Mostly cloudy. Fog early. High of 28F. Winds less than 5 mph.

  • Monday Night

    Mostly cloudy with a chance of snow. Fog overnight. Low of 18F. Winds less than 5 mph. Chance of snow 30% with accumulations up to 1 in. possible.

  • Tuesday

    Partly cloudy. High of 25F. Winds from the NW at 5 to 10 mph.

  • Tuesday Night

    Clear. Low of 18F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Branch Street, St. Louis, MO

Updated: 3:20 PM CST

Temperature: 41.9 °F Dew Point: - Humidity: 73% Wind: North at - Pressure: 29.78 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: BLAIR STREET, St. Louis, MO

Updated: 3:20 PM CST

Temperature: 42.3 °F Dew Point: - Humidity: 77% Wind: North at - Pressure: 29.71 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Shaw/Tower Grove, St. Louis, MO

Updated: 3:21 PM CST

Temperature: 42.3 °F Dew Point: 35 °F Humidity: 76% Wind: Calm Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Forest Park, St. Louis, MO

Updated: 3:20 PM CST

Temperature: 41.2 °F Dew Point: - Humidity: 69% Wind: North at - Pressure: 29.62 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 3:21 PM CST

Temperature: 42.1 °F Dew Point: 35 °F Humidity: 76% Wind: ESE at 2.2 mph Pressure: 30.21 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Franz Park, St. Louis, MO

Updated: 3:25 PM CST

Temperature: 42.1 °F Dew Point: 37 °F Humidity: 81% Wind: North at - Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Boulevard Heights, St. Louis, MO

Updated: 3:26 PM CST

Temperature: 47.1 °F Dew Point: 38 °F Humidity: 69% Wind: North at - Pressure: 30.31 in Hourly Precipitation: - Windchill: 47 °F Graphs

Location: BROADWAY (South), St. Louis, MO

Updated: 3:20 PM CST

Temperature: 41.7 °F Dew Point: - Humidity: 69% Wind: North at - Pressure: 29.58 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Morehouse Lane, University City, MO

Updated: 3:25 PM CST

Temperature: 46.4 °F Dew Point: 36 °F Humidity: 66% Wind: North at - Pressure: 30.31 in Hourly Precipitation: - Windchill: 46 °F Graphs

Location: www.seedgeeks.com, Brentwood, MO

Updated: 3:18 PM CST

Temperature: 43.3 °F Dew Point: 35 °F Humidity: 73% Wind: Calm Pressure: 30.21 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Ladue, St. Louis, MO

Updated: 3:20 PM CST

Temperature: 42.4 °F Dew Point: - Humidity: 69% Wind: North at - Pressure: 29.55 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Parkridge, Brentwood, MO

Updated: 3:28 PM CST

Temperature: 41.9 °F Dew Point: - Humidity: - Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: South County, Affton, MO

Updated: 3:28 PM CST

Temperature: 41.6 °F Dew Point: 36 °F Humidity: 80% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Webster Groves, Webster Groves, MO

Updated: 3:25 PM CST

Temperature: 41.3 °F Dew Point: 31 °F Humidity: 66% Wind: ENE at 3.0 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Old Skewl, Fairview Heights, IL

Updated: 3:28 PM CST

Temperature: 42.4 °F Dew Point: 30 °F Humidity: 62% Wind: South at 3.6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 3:28 PM CST

Temperature: 41.7 °F Dew Point: 35 °F Humidity: 76% Wind: South at 4.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: City of Olivette - Public Works, Olivette, MO

Updated: 3:27 PM CST

Temperature: 41.7 °F Dew Point: 35 °F Humidity: 77% Wind: SE at 2.0 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: West End, Belleville, IL

Updated: 3:28 PM CST

Temperature: 42.3 °F Dew Point: 20 °F Humidity: 58% Wind: Calm Pressure: 31.51 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Millstadt, Millstadt, IL

Updated: 3:28 PM CST

Temperature: 41.0 °F Dew Point: 29 °F Humidity: 61% Wind: SE at 3.5 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: Collinsville West, Collinsville, IL

Updated: 3:28 PM CST

Temperature: 40.5 °F Dew Point: 32 °F Humidity: 73% Wind: SSE at 1.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Crestwood, Crestwood, MO

Updated: 3:18 PM CST

Temperature: 42.1 °F Dew Point: 36 °F Humidity: 79% Wind: ESE at 1.7 mph Pressure: 29.95 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Jefferson Barracks, Mehlville, MO

Updated: 3:28 PM CST

Temperature: 41.9 °F Dew Point: 34 °F Humidity: 74% Wind: East at 2.2 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Tim and Carolyns yard, COLLINSVILLE, IL

Updated: 3:28 PM CST

Temperature: 43.2 °F Dew Point: 35 °F Humidity: 72% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: 1 Mile South of St. Louis Lambert Airport, Woodson Terrace, MO

Updated: 3:29 PM CST

Temperature: 40.7 °F Dew Point: 35 °F Humidity: 79% Wind: SSE at 3.0 mph Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: East Madison, Kirkwood, MO, Kirkwood, MO

Updated: 3:28 PM CST

Temperature: 41.4 °F Dew Point: 35 °F Humidity: 78% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Greg and Linsay's House, Swansea, IL

Updated: 3:28 PM CST

Temperature: 41.2 °F Dew Point: 33 °F Humidity: 72% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: StormGrl2001, Fairview Heights, IL

Updated: 3:17 PM CST

Temperature: 41.9 °F Dew Point: 34 °F Humidity: 74% Wind: East at 1.1 mph Pressure: 30.17 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Gedern Village, Columbia, IL

Updated: 3:27 PM CST

Temperature: 42.6 °F Dew Point: 36 °F Humidity: 78% Wind: Calm Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: St. Ann, MO, St. Ann, MO

Updated: 3:20 PM CST

Temperature: 41.7 °F Dew Point: 36 °F Humidity: 79% Wind: South at 2.7 mph Pressure: 30.13 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 3:28 PM CST

Temperature: 42.5 °F Dew Point: 35 °F Humidity: 75% Wind: SSW at 2.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 3:24 PM CST

Temperature: 42.6 °F Dew Point: 36 °F Humidity: 78% Wind: Calm Pressure: 30.03 in Hourly Precipitation: - Windchill: 43 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
316 PM CST Sat Dec 20 2014 


Short term: (through late tonight) 
issued at 302 PM CST Sat Dec 20 2014 


Clouds will persist early tonight and perhaps start to decrease 
from south to north by morning. Overnight lows should be similar 
to last night in most locations. 


Kanofsky 


Long term: (sunday through next saturday) 
issued at 302 PM CST Sat Dec 20 2014 


The primary forecast issues revolve around a large low pressure 
system and a deep trough which are expected to affect the area 
between Mon and Wed. 


The ongoing gradual warming trend (highs today were generally about 
5 degrees warmer than yesterday, which in turn was a few degrees 
warmer than the previous day) will persist on Sunday and Monday. 
Monday's highs in the mid-40s to lower 50s will be around 10 
degrees above average for this time of year. 


The aforementioned low pressure system develops over the northern 
plains on Sunday and Sunday night, eventually closing off on Mon or 
Mon night within a deep trough over the central Continental U.S.. this system 
will dominate our weather through Wed, and widespread rain is likely 
as it moves into the region on Mon and Mon night. Forecast precipitable water values 
of between 0.6" and 0.8" by 00z Tue are above the 75th percentile 
and approaching +2 South Dakota for December. A cold front is expected to move 
through parts of MO/Illinois on late Mon night or Tue morning, which is 
slower timing than the models were predicting ydy. By Tue 
afternoon or evening, some of the rain will probably switch over 
to light snow within the colder Post-frontal air mass. 
Temperatures return to near or below average behind the front. 


Meanwhile, a second vort Max is forecast to drop into the central 
Continental U.S. Trough and induce a new surface wave along the cold front 
somewhere in Texas/AR/la (a third, smaller vort Max interacts with 
the northern upper low center during this time). The resulting 
southern system then lifts northeastward on Tue and Tue night, but 
there are sufficient differences between the GFS and European model (ecmwf) to 
preclude getting more specific than schc/chc pops with a generic 
rain/snow mix. 


After the trough rotates away on Wed night or Thu, a brief period 
of upper ridging is anticipated ahead of the next disturbance. The 
12z runs of the European model (ecmwf) and GFS are in better agreement on the large 
scale pattern compared to 24hrs ago, but the forecast with this 
system will still depend on what will have happened with the 
previous system, and confidence remains low. 


Kanofsky 


&& 


Aviation: (for the 18z tafs through 18z Sunday afternoon) 
issued at 1145 am CST Sat Dec 20 2014 


Seeing some holes in the clouds today, some making their way 
towards stl Metro area. But for the most part continue to see MVFR 
cigs most locations, though did add tempo mention of IFR cigs at 
KUIN for a few hours this afternoon. Winds to persist from the 
south through the forecast period. 


Specifics for kstl: 
seeing some holes in the clouds today, some making their way 
towards stl Metro area. But kept MVFR cigs for now. Winds to 
persist from the south through the forecast period. 


Byrd 


&& 


Lsx watches/warnings/advisories: 
MO...none. 
Illinois...none. 
&& 


$$ 


Weather forecast office lsx 












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