Saint Charles, Missouri Weather Conditions

Your Weather

To update your location please enter your ZIP code, city, state, airport code or country in the field below. Weather by E-mail: Forecast storm alerts. Weather E-Mail Alert Sign Up »

Current Conditions

  • 57°
  • Clear
  • Wind: NW 4 mph
  • Humidity: 77%
  • Visibility: 10.0 miles
  • Dew Point: 50°
  • Pressure: 30.17 in. +

Select a Section

Click a section below for more information.

Next 12 Hours

1  am
4  am
7  am
10  am
1  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
55°
54°
52°
61°
68°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Clear
  • High: 70 °
  • Low: 45 °
  • Clear
  • Tuesday
  • Partly Cloudy
  • High: 70 °
  • Low: 54 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 75 °
  • Low: 52 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 77 °
  • Low: 54 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 77 °
  • Low: 54 °
  • Partly Cloudy

Forecast for Saint Charles, Missouri

Updated: 10:00 PM CDT on September 21, 2014

  • Monday

    Clear in the morning, then partly cloudy. High of 70F. Winds from the NNE at 5 to 10 mph.

  • Monday Night

    Clear. Low of 45F. Winds less than 5 mph.

  • Tuesday

    Clear. High of 70F. Winds from the ESE at 5 to 10 mph.

  • Tuesday Night

    Clear. Low of 54F. Winds from the East at 5 to 10 mph.

  • Wednesday

    Overcast in the morning, then partly cloudy. High of 75F. Winds from the ESE at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 52F. Winds from the ESE at 5 to 10 mph.

  • Thursday

    Partly cloudy. High of 77F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 54F. Winds from the ESE at 5 to 10 mph.

  • Friday

    Clear in the morning, then partly cloudy. High of 77F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy. Low of 54F. Winds from the East at 5 to 10 mph.

  • Saturday

    Mostly cloudy. High of 77F. Winds from the East at 5 to 10 mph.

  • Saturday Night

    Mostly cloudy with a chance of rain. Low of 52F. Winds from the ESE at 5 to 10 mph. Chance of rain 20%.

  • Sunday

    Mostly cloudy with a chance of rain. High of 79F. Winds from the East at 5 to 10 mph. Chance of rain 20%.

  • Sunday Night

    Mostly cloudy. Fog overnight. Low of 57F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 77F. Winds less than 5 mph.

  • Monday Night

    Clear. Low of 57F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy. High of 75F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Low of 57F. Winds less than 5 mph.

  • Wednesday

    Mostly cloudy with a chance of rain. High of 75F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy. Low of 59F. Winds less than 5 mph.

  • Thursday

    Clear. High of 73F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 59F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Fox Hill, Saint Charles, MO

Updated: 11:00 PM CDT

Temperature: 60.1 °F Dew Point: 50 °F Humidity: 70% Wind: Calm Pressure: 29.62 in Hourly Precipitation: 0.00 in Graphs

Location: Lindenwood, St. Charles, MO

Updated: 1:13 AM CDT

Temperature: 57.6 °F Dew Point: 53 °F Humidity: 85% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 1:13 AM CDT

Temperature: 56.9 °F Dew Point: 51 °F Humidity: 81% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 1:13 AM CDT

Temperature: 57.0 °F Dew Point: 53 °F Humidity: 86% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Polestar Boating Center, St. Charles, MO

Updated: 1:13 AM CDT

Temperature: 60.2 °F Dew Point: 54 °F Humidity: 79% Wind: WNW at 5.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Graphs

Location: Talbridge, St. Charles, MO

Updated: 1:13 AM CDT

Temperature: 57.2 °F Dew Point: 52 °F Humidity: 83% Wind: Calm Pressure: 30.14 in Hourly Precipitation: 0.00 in Graphs

Location: Riverwood Place, Florissant, MO

Updated: 1:13 AM CDT

Temperature: 54.1 °F Dew Point: 52 °F Humidity: 92% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Earth City, Earth City, MO

Updated: 2:10 AM EDT

Temperature: 58.8 °F Dew Point: 52 °F Humidity: 79% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Graphs

Location: West Drive, St. Peters, MO

Updated: 1:13 AM CDT

Temperature: 56.2 °F Dew Point: 52 °F Humidity: 85% Wind: Calm Pressure: 30.20 in Hourly Precipitation: 0.00 in Graphs

Location: Danielle Downs, St. Peters, MO

Updated: 1:13 AM CDT

Temperature: 57.4 °F Dew Point: 53 °F Humidity: 85% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: St. Peters, St. Peters, MO

Updated: 1:13 AM CDT

Temperature: 56.1 °F Dew Point: 51 °F Humidity: 84% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 1:11 AM CDT

Temperature: 52.7 °F Dew Point: 50 °F Humidity: 90% Wind: Calm Pressure: 30.16 in Hourly Precipitation: 0.00 in Graphs

Location: Harvester, St. Charles, MO

Updated: 1:10 AM CDT

Temperature: 55.7 °F Dew Point: 52 °F Humidity: 87% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Graphs

Location: Maryland Heights, MO

Updated: 1:12 AM CDT

Temperature: 56.6 °F Dew Point: 52 °F Humidity: 86% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: Creve Coeur Park - Forest ReLeaf, St. Louis, MO

Updated: 1:04 AM CDT

Temperature: 52.7 °F Dew Point: 51 °F Humidity: 94% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 1:04 AM CDT

Temperature: 55.4 °F Dew Point: 51 °F Humidity: 85% Wind: Calm Pressure: 30.10 in Hourly Precipitation: - Graphs

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

Updated: 1:13 AM CDT

Temperature: 56.0 °F Dew Point: 51 °F Humidity: 84% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 1:13 AM CDT

Temperature: 54.5 °F Dew Point: 51 °F Humidity: 88% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 1:13 AM CDT

Temperature: 53.6 °F Dew Point: 53 °F Humidity: 98% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Graphs

Location: Maryland Heights, St Louis, MO

Updated: 1:13 AM CDT

Temperature: 57.0 °F Dew Point: 52 °F Humidity: 82% Wind: Calm Pressure: 29.51 in Hourly Precipitation: 0.00 in Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 1:05 AM CDT

Temperature: 54.7 °F Dew Point: 52 °F Humidity: 92% Wind: Calm Pressure: 30.09 in Hourly Precipitation: - Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 1:13 AM CDT

Temperature: 55.8 °F Dew Point: 49 °F Humidity: 79% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 1:12 AM CDT

Temperature: 57.6 °F Dew Point: 53 °F Humidity: 85% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Ross Ave, St. Louis, MO

Updated: 11:30 PM CDT

Temperature: 61.7 °F Dew Point: 51 °F Humidity: 67% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 1:13 AM CDT

Temperature: 59.4 °F Dew Point: 54 °F Humidity: 84% Wind: Calm Pressure: 30.37 in Hourly Precipitation: 0.00 in Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 1:13 AM CDT

Temperature: 56.6 °F Dew Point: 52 °F Humidity: 84% Wind: Calm Pressure: 30.16 in Hourly Precipitation: 0.00 in Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 1:13 AM CDT

Temperature: 56.8 °F Dew Point: 52 °F Humidity: 84% Wind: Calm Pressure: 30.20 in Hourly Precipitation: 0.00 in Graphs

Location: Graeser Acres, St. Louis, MO

Updated: 1:13 AM CDT

Temperature: 58.9 °F Dew Point: 50 °F Humidity: 71% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 1:09 AM CDT

Temperature: 56.7 °F Dew Point: 52 °F Humidity: 84% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 1:13 AM CDT

Temperature: 54.2 °F Dew Point: 52 °F Humidity: 92% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Graphs

Location: Downtown O'Fallon, O'Fallon, MO

Updated: 1:13 AM CDT

Temperature: 54.0 °F Dew Point: 51 °F Humidity: 91% Wind: West at 2.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Graphs

Location: Hyland Green, O'Fallon, MO

Updated: 1:13 AM CDT

Temperature: 54.9 °F Dew Point: 53 °F Humidity: 93% Wind: Calm Pressure: 29.79 in Hourly Precipitation: 0.00 in Graphs

Location: Pennial Park, O'Fallon, MO

Updated: 1:10 AM CDT

Temperature: 54.3 °F Dew Point: 49 °F Humidity: 83% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated aviation 
National Weather Service St Louis MO 
1145 PM CDT sun Sep 21 2014 


Short term: (through late tonight) 
issued at 138 PM CDT sun Sep 21 2014 


Focus tonight will be temps. Sfc ridge builds into the region with 
winds diminishing with sunset. Current cloud deck over nrn Illinois and 
ern Iowa shud continue to break up this afternoon as it moves ESE 
leaving much of tonight clear. Greater mixing has occurred today 
than prev anticipated, lowering dewpoints. While tonight is not a 
great setup for radiational cooling as winds may stay up around 5 
kts, believe cold air advection will help compensate. Have therefore trended aob 
the coolest guidance for tonight. 


Long term: (monday through next sunday) 
issued at 307 PM CDT sun Sep 21 2014 


High pressure will dominate over the region this week, allowing for 
cool temperatures, dry conditions, and mostly clear skies through 
early next weekend. Monday and Monday night, given the proximity of 
the surface ridge axis and 850mb temps in the 8-10c range, should 
yield the coolest temperatures this week, with highs Monday in the 
low 70s, and lows Monday night in the 40s,to around 50 degrees in 
the St. Louis metropolitan area. By Tuesday, south/southeast flow 
will return to the area and slow warming trend will get underway. 
Temperatures are expected to gradually warm, rebounding to the upper 
70s to around 80 degrees area- wide by Friday. 


Precipitation chances look to remain quite low through the 
extended, though there are two disturbances in question that could 
potentially impact the area. The first disturbance, a low pressure 
system that is currently over far western Nevada per water vapor 
imagery, is progged to become absorbed into the mean flow by 
midweek. However, models are in agreement indicating an axis 
through the plains where the ridge will be weakened due to this 
feature, which could be a focus for precipitation through the end 
of the week. Currently, it looks like any precipitation that would 
be associated with this feature would remain well to the west of 
the County warning forecast area prior to high pressure once again building over the 
nation's midsection. The GFS is also indicating another 
disturbance for the late Saturday night/early Sunday time frame 
which could potentially impact far southeast portions of the cwfa, 
but it is too early to tell how this could potentially pan out. 
Thus, have maintained a dry forecast. 


Phillipson 


&& 


Aviation: (for the 06z tafs through 06z Monday night) 
issued at 1140 PM CDT sun Sep 21 2014 


A ridge of high pressure is building into the region, which will 
ensure VFR conditions at all taf sites except for ksus, which 
might be affected by steam fog between 09-12z. Northerly winds 
will gradually veer through the period with wind speeds remaining 
at or below 10 kts. 


Specifics for kstl: VFR with northerly winds veering to become 
easterly towards the end of the 30-hr taf period. 


Kanofsky 


&& 


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


$$ 


Weather forecast office lsx 



National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Powered by the Weather Underground, Inc.