Saint Charles, Missouri Weather Conditions

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Current Conditions

  • 41°
  • Overcast
  • Wind: SE 6 mph
  • Humidity: 76%
  • Visibility: 8.0 miles
  • Dew Point: 34°
  • Pressure: 30.24 in. +
  • Heat Index: 37

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Next 12 Hours

3  pm
6  pm
9  pm
12  am
3  am
Overcast
Overcast
Overcast
Overcast
Overcast
Overcast
Overcast
Overcast
Partly Cloudy
Partly Cloudy
43°
36°
37°
36°
34°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Overcast
  • High: 43 °
  • Low: 34 °
  • Overcast
  • Sunday
  • Partly Cloudy
  • High: 45 °
  • Low: 34 °
  • Partly Cloudy
  • Monday
  • Rain
  • High: 50 °
  • Low: 41 °
  • Rain
  • Tuesday
  • Chance of Rain
  • High: 48 °
  • Low: 30 °
  • Chance of Rain
  • Wednesday
  • Chance of Snow
  • High: 39 °
  • Low: 28 °
  • Chance of Snow

Forecast for Saint Charles, Missouri

Updated: 3:00 PM CST on December 20, 2014

  • Saturday

    Overcast. High of 43F. Winds from the SSE at 5 to 10 mph.

  • Saturday Night

    Overcast. Low of 34F with a windchill as low as 28F. Winds from the SE at 5 to 10 mph.

  • Sunday

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

  • Sunday Night

    Partly cloudy. Low of 34F with a windchill as low as 28F. 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. Fog overnight. Low of 41F. Winds from the SSW at 5 to 15 mph. Chance of rain 50%.

  • Tuesday

    Overcast with a chance of rain. High of 48F. Winds from the West at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Overcast with a chance of rain, then a chance of snow and a chance of rain after midnight. Fog overnight. Low of 30F with a windchill as low as 23F. Winds from the NNW at 10 to 15 mph. Chance of precipitation 70% with accumulations up to 4 in. possible.

  • Wednesday

    Overcast with a chance of snow and a chance of rain. High of 39F with a windchill as low as 21F. Breezy. Winds from the WNW at 15 to 20 mph. Chance of snow 60%.

  • Wednesday Night

    Partly cloudy with a chance of snow. Low of 28F with a windchill as low as 18F. Breezy. Winds from the West at 15 to 20 mph. Chance of snow 20%.

  • Thursday

    Clear. High of 50F. Winds from the SW at 10 to 15 mph.

  • Thursday Night

    Partly cloudy. Low of 30F. Winds from the South at 10 to 15 mph.

  • Friday

    Partly cloudy. Fog early. High of 46F. Winds from the SSW at 10 to 15 mph shifting to the West in the afternoon.

  • Friday Night

    Partly cloudy. Low of 25F with a windchill as low as 19F. Winds from the NW at 10 to 15 mph.

  • Saturday

    Partly cloudy. High of 32F. Winds from the NW at 5 to 10 mph shifting to the WSW in the afternoon.

  • Saturday Night

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

  • Sunday

    Partly cloudy. High of 28F. Winds from the West at 5 to 10 mph.

  • Sunday Night

    Mostly cloudy. Fog overnight. Low of 19F. Winds less than 5 mph.

  • Monday

    Mostly cloudy. Fog early. High of 27F. Winds less than 5 mph.

  • Monday Night

    Overcast with a chance of snow. Fog overnight. Low of 18F. Winds less than 5 mph. Chance of snow 20% with accumulations up to 1 in. possible.

  • Tuesday

    Mostly cloudy with a chance of snow. Fog early. High of 23F. Winds from the NW at 5 to 10 mph. Chance of snow 20%.

  • Tuesday Night

    Partly cloudy. Fog overnight. Low of 16F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 21F. Winds from the WNW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 16F with a windchill as low as -4F. Winds from the North at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Fox Hill, Saint Charles, MO

Updated: 4:13 PM CST

Temperature: 41.2 °F Dew Point: 33 °F Humidity: 72% Wind: SSE at 2.2 mph Pressure: 29.64 in Hourly Precipitation: 2.56 in Windchill: 41 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 4:13 PM CST

Temperature: 41.6 °F Dew Point: 35 °F Humidity: 77% Wind: Calm Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 4:13 PM CST

Temperature: 42.1 °F Dew Point: 32 °F Humidity: 68% Wind: SE at 3.5 mph Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 4:13 PM CST

Temperature: 42.3 °F Dew Point: 36 °F Humidity: 77% Wind: ENE at 1.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Polestar Boating Center, St. Charles, MO

Updated: 4:13 PM CST

Temperature: 41.5 °F Dew Point: 36 °F Humidity: 82% Wind: Calm Pressure: 30.31 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 4:13 PM CST

Temperature: 41.5 °F Dew Point: 35 °F Humidity: 77% Wind: Calm Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 4:13 PM CST

Temperature: 41.9 °F Dew Point: 36 °F Humidity: 79% Wind: Calm Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 4:13 PM CST

Temperature: 41.8 °F Dew Point: 35 °F Humidity: 76% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Windwood,Nic S., St. Peters, MO

Updated: 4:04 PM CST

Temperature: 42.1 °F Dew Point: 35 °F Humidity: 75% Wind: South at 1.1 mph Pressure: 30.00 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: St. Peters, St. Peters, MO

Updated: 4:13 PM CST

Temperature: 42.1 °F Dew Point: 35 °F Humidity: 77% Wind: SSW at 2.0 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 4:10 PM CST

Temperature: 42.5 °F Dew Point: 36 °F Humidity: 78% Wind: South at 2.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 4:11 PM CST

Temperature: 42.5 °F Dew Point: 36 °F Humidity: 78% Wind: SE at 1.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Maryland Heights, MO

Updated: 3:12 PM CST

Temperature: 42.8 °F Dew Point: 36 °F Humidity: 76% Wind: SE at 1.0 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 4:10 PM CST

Temperature: 41.2 °F Dew Point: 30 °F Humidity: 65% Wind: East at 3.1 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: CommuniTree Gardens Nursery, St. Louis, MO

Updated: 4:08 PM CST

Temperature: 41.9 °F Dew Point: 35 °F Humidity: 77% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

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

Updated: 4:06 PM CST

Temperature: 41.4 °F Dew Point: 36 °F Humidity: 80% Wind: SSE at 2.7 mph Pressure: 30.14 in Hourly Precipitation: - Windchill: 41 °F Graphs

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

Updated: 4:13 PM CST

Temperature: 40.7 °F Dew Point: 35 °F Humidity: 80% Wind: SSE at 1.0 mph Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 4:13 PM CST

Temperature: 41.9 °F Dew Point: 36 °F Humidity: 79% Wind: SSW at 2.2 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 4:13 PM CST

Temperature: 41.9 °F Dew Point: 34 °F Humidity: 72% Wind: SE at 1.1 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Maryland Heights, St Louis, MO

Updated: 4:11 PM CST

Temperature: 41.3 °F Dew Point: 35 °F Humidity: 78% Wind: ESE at 3.0 mph Pressure: 29.59 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 4:02 PM CST

Temperature: 42.6 °F Dew Point: 36 °F Humidity: 77% Wind: SSE at 2.7 mph Pressure: 30.12 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 4:13 PM CST

Temperature: 43.0 °F Dew Point: 35 °F Humidity: 72% Wind: South at 2.5 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Country Crossing - Birdie Hills and Treeshadow, St. Peters, MO

Updated: 4:00 PM CST

Temperature: 42.8 °F Dew Point: 36 °F Humidity: 76% Wind: ESE at 2.2 mph Pressure: 30.08 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 4:12 PM CST

Temperature: 40.6 °F Dew Point: 35 °F Humidity: 79% Wind: SSE at 2.0 mph Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 4:13 PM CST

Temperature: 42.3 °F Dew Point: 36 °F Humidity: 78% Wind: Calm Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: O'fallon / St. Peters, St. Peters, MO

Updated: 4:13 PM CST

Temperature: 43.0 °F Dew Point: 36 °F Humidity: 76% Wind: Calm Pressure: 30.20 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 4:13 PM CST

Temperature: 42.1 °F Dew Point: 35 °F Humidity: 76% Wind: ESE at 3.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 4:13 PM CST

Temperature: 42.1 °F Dew Point: 36 °F Humidity: 78% Wind: Calm Pressure: 30.28 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 4:13 PM CST

Temperature: 41.6 °F Dew Point: 34 °F Humidity: 73% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 4:10 PM CST

Temperature: 42.5 °F Dew Point: 36 °F Humidity: 77% Wind: SE at 2.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 4:13 PM CST

Temperature: 42.1 °F Dew Point: 36 °F Humidity: 79% Wind: Calm Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 42 °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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