Saint Charles, Missouri Weather Conditions

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Current Conditions

  • 42°
  • Overcast
  • Wind: NE 10 mph
  • Humidity: 65%
  • Visibility: 10.0 miles
  • Dew Point: 31°
  • Pressure: 30.19 in. +
  • Heat Index: 36

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Next 12 Hours

6  pm
9  pm
12  am
3  am
6  am
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
34°
30°
28°
28°
27°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 44 °
  • Low: 27 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 50 °
  • Low: 41 °
  • Partly Cloudy
  • Thursday
  • Mostly Cloudy
  • High: 46 °
  • Low: 23 °
  • Mostly Cloudy
  • Friday
  • Clear
  • High: 37 °
  • Low: 25 °
  • Clear
  • Saturday
  • Partly Cloudy
  • High: 37 °
  • Low: 34 °
  • Partly Cloudy

Forecast for Saint Charles, Missouri

Updated: 3:00 PM CST on January 27, 2015

  • Tuesday

    Partly cloudy. High of 43F. Winds from the NNW at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy in the evening, then clear. Low of 27F. Winds from the NE at 5 to 10 mph shifting to the ESE after midnight.

  • Wednesday

    Clear in the morning, then mostly cloudy. High of 50F. Breezy. Winds from the SE at 10 to 20 mph.

  • Wednesday Night

    Partly cloudy. Low of 41F. Winds from the SSW at 10 to 15 mph.

  • Thursday

    Overcast in the morning, then mostly cloudy. High of 46F. Breezy. Winds from the NW at 15 to 20 mph.

  • Thursday Night

    Partly cloudy. Low of 23F. Breezy. Winds from the NNW at 10 to 20 mph.

  • Friday

    Clear. High of 37F. Winds from the NNE at 5 to 15 mph.

  • Friday Night

    Partly cloudy. Low of 25F with a windchill as low as 19F. Winds from the East at 5 to 10 mph shifting to the SSE after midnight.

  • Saturday

    Mostly cloudy in the morning, then overcast. High of 37F with a windchill as low as 19F. Winds from the South at 10 to 15 mph.

  • Saturday Night

    Partly cloudy with a chance of rain. Low of 34F. Winds from the SSW at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Sunday

    Partly cloudy with a chance of snow. Fog early. High of 36F with a windchill as low as 19F. Winds from the SW at 5 to 20 mph shifting to the WNW in the afternoon. Chance of snow 50% with accumulations up to 1 in. possible.

  • Sunday Night

    Partly cloudy. Low of 16F. Breezy. Winds from the NNW at 15 to 25 mph.

  • Monday

    Clear. High of 28F with a windchill as low as 5F. Winds from the NNW at 5 to 20 mph.

  • Monday Night

    Partly cloudy with a chance of snow. Low of 7F with a windchill as low as -6F. Winds from the ENE at 5 to 15 mph. Chance of snow 20% with accumulations up to 1 in. possible.

  • Tuesday

    Clear with a chance of snow. High of 25F with a windchill as low as 3F. Winds from the ESE at 10 to 15 mph. Chance of snow 50% with accumulations up to 2 in. possible.

  • Tuesday Night

    Clear. Fog overnight. Low of 18F with a windchill as low as 9F. Winds from the ENE at 5 to 15 mph.

  • Wednesday

    Clear. High of 27F. Winds less than 5 mph.

  • Wednesday Night

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

  • Thursday

    Clear. Fog early. High of 32F. Winds less than 5 mph.

  • Thursday Night

    Clear. Fog overnight. Low of 14F. Winds less than 5 mph.

  • Friday

    Clear. High of 32F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 16F. Winds less than 5 mph.

  • Saturday

    Clear. High of 34F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 16F with a windchill as low as -13F. Winds from the NW at 10 to 15 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Fox Hill, Saint Charles, MO

Updated: 4:55 PM CST

Temperature: 41.0 °F Dew Point: 31 °F Humidity: 68% Wind: NE at 4.0 mph Pressure: 30.90 in Hourly Precipitation: - Windchill: 38 °F Graphs

Location: Huntington Downs, Saint Charles, MO

Updated: 4:56 PM CST

Temperature: 43.3 °F Dew Point: 33 °F Humidity: 66% Wind: North at - Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 4:57 PM CST

Temperature: 41.3 °F Dew Point: 33 °F Humidity: 72% Wind: Calm Pressure: 30.20 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 4:57 PM CST

Temperature: 41.9 °F Dew Point: 31 °F Humidity: 65% Wind: NE at 5.8 mph Pressure: 30.21 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: APRSWXNET Orchard Farm MO US, Grafton, IL

Updated: 4:35 PM CST

Temperature: 41 °F Dew Point: 34 °F Humidity: 76% Wind: ENE at 6 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 4:57 PM CST

Temperature: 42.3 °F Dew Point: 34 °F Humidity: 71% Wind: NE at 3.1 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 4:57 PM CST

Temperature: 42.8 °F Dew Point: 34 °F Humidity: 70% Wind: East at 2.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: manors of orchard glen, St. Peters, MO

Updated: 4:57 PM CST

Temperature: 42.6 °F Dew Point: 31 °F Humidity: 63% Wind: East at 3.4 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: APRSWXNET St. Peters MO US, Saint Peters, MO

Updated: 4:30 PM CST

Temperature: 43 °F Dew Point: 34 °F Humidity: 69% Wind: NE at 1 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 4:57 PM CST

Temperature: 42.6 °F Dew Point: 33 °F Humidity: 67% Wind: NNE at 1.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: APRSWXNET Saint Charles MO US, Saint Charles, MO

Updated: 3:30 PM CST

Temperature: 45 °F Dew Point: 26 °F Humidity: 47% Wind: NNW at 3 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 3:45 PM CST

Temperature: 44.6 °F Dew Point: 26 °F Humidity: 47% Wind: ENE at 6.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

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

Updated: 4:44 PM CST

Temperature: 44.6 °F Dew Point: 32 °F Humidity: 61% Wind: NNW at 1.7 mph Pressure: 29.92 in Hourly Precipitation: - Windchill: 45 °F Graphs

Location: Riverside at Albers Pointe, Florissant, MO

Updated: 4:44 PM CST

Temperature: 42.1 °F Dew Point: 30 °F Humidity: 67% Wind: North at - Pressure: 30.15 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Hunters Valley, Saint Peters, MO

Updated: 4:53 PM CST

Temperature: 42.4 °F Dew Point: 31 °F Humidity: 63% Wind: NNE at 1.7 mph Pressure: 30.10 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: St. Peters, St. Peters, MO

Updated: 4:57 PM CST

Temperature: 44.1 °F Dew Point: 33 °F Humidity: 66% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: APRSWXNET St. Peters MO US, Cottleville, MO

Updated: 4:31 PM CST

Temperature: 45 °F Dew Point: 34 °F Humidity: 65% Wind: SE at 4 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 4:56 PM CST

Temperature: 42.6 °F Dew Point: 34 °F Humidity: 72% Wind: SSW at 2.0 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Saint Peters Hills, Saint Peters, MO

Updated: 4:57 PM CST

Temperature: 43.0 °F Dew Point: 30 °F Humidity: 60% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 4:50 PM CST

Temperature: 43.2 °F Dew Point: 34 °F Humidity: 69% Wind: ENE at 1.0 mph Pressure: 30.20 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Jost Farm, Florissant, MO

Updated: 4:55 PM CST

Temperature: 46.4 °F Dew Point: 32 °F Humidity: 56% Wind: NE at 2.2 mph Pressure: 30.19 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: McClay Trails, Saint Charles, MO

Updated: 4:54 PM CST

Temperature: 42.1 °F Dew Point: 31 °F Humidity: 65% Wind: NW at 4.7 mph Pressure: 29.60 in Hourly Precipitation: - Windchill: 39 °F Graphs

Location: CommuniTree Gardens Nursery, St. Louis, MO

Updated: 4:51 PM CST

Temperature: 43.3 °F Dew Point: 34 °F Humidity: 69% Wind: ENE at 2.0 mph Pressure: 29.68 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

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

Updated: 4:43 PM CST

Temperature: 42.8 °F Dew Point: 34 °F Humidity: 70% Wind: Calm Pressure: 30.10 in Hourly Precipitation: - Windchill: 43 °F Graphs

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

Updated: 4:57 PM CST

Temperature: 41.4 °F Dew Point: 33 °F Humidity: 72% Wind: Calm Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 4:57 PM CST

Temperature: 42.3 °F Dew Point: 34 °F Humidity: 72% Wind: NNE at 2.2 mph Pressure: 29.64 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 4:57 PM CST

Temperature: 43.3 °F Dew Point: 32 °F Humidity: 63% Wind: North at 2.9 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Maryland Heights, St Louis, MO

Updated: 4:50 PM CST

Temperature: 42.7 °F Dew Point: 33 °F Humidity: 69% Wind: Calm Pressure: 29.55 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 4:55 PM CST

Temperature: 42.6 °F Dew Point: 34 °F Humidity: 70% Wind: West at 3.7 mph Pressure: 30.09 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Public Works Department Building, OFallon, MO

Updated: 4:55 PM CST

Temperature: 45.3 °F Dew Point: 33 °F Humidity: 63% Wind: East at 2.0 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 4:57 PM CST

Temperature: 43.7 °F Dew Point: 33 °F Humidity: 65% Wind: East at 1.8 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

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

Updated: 4:44 PM CST

Temperature: 45.1 °F Dew Point: 34 °F Humidity: 64% Wind: South at 4.2 mph Pressure: 30.05 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 4:56 PM CST

Temperature: 42.2 °F Dew Point: 33 °F Humidity: 70% Wind: ENE at 1.0 mph Pressure: 30.23 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: APRSWXNET St. Louis MO US, Saint Louis, MO

Updated: 4:33 PM CST

Temperature: 43 °F Dew Point: 32 °F Humidity: 64% Wind: SSW at 2 mph Pressure: 30.17 in Hourly Precipitation: 0.00 in 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 
400 PM CST Tue Jan 27 2015 


Short term: (through late tonight) 
issued at 400 PM CST Tue Jan 27 2015 


Surface ridge extending from WI southwest into northern MO will 
strengthen and move southeastward into the Ohio Valley region by 12z 
Wednesday. Persistent low level cloud cover extends across eastern 
Iowa and much of Illinois this afternoon with some diurnally driven 
cloudiness across eastern MO. Much of the cloud cover over eastern 
MO should dissipate early this evening. The models try to slowly 
dissipate and advect eastward the more solid cloud cover across 
eastern Iowa and Illinois tonight. While this is possible due to at least 
weak subsidence across the area, would not be surprised if this 
cloud cover remains trapped under the inversion and actually 
retrogrades some westward tonight as the surface/boundary layer wind 
veers around to an easterly direction this evening. If this low 
level cloud cover remains through the night the MOS minimum 
temperature guidance may be a little too cool across the Illinois counties 
of our forecast area. Lows tonight across the western portion of 
the forecast area will be warmer despite less cloud cover due to 
increasing low level warm air advection on the nose of a 
southwesterly low level jet. 


Gks 


Long term: (wednesday through next tuesday) 
issued at 400 PM CST Tue Jan 27 2015 


(wednesday-friday) 


12z guidance continues to support thinking that a strong but brief 
warmup will occur tomorrow, followed by a cooling trend 
that should send temps to below average levels by the end of the 
work week. Have maintained current forecast highs for Wednesday, 
which is several degrees warmer than warmest GFS mav. In spite of 
the very strong inversion that is forecast to limit mixing still 
think warmer is the way to go, as guidance hasn't been robust enough 
the past few times we've had strong warming. I'm also uncertain how 
much cloudiness there will be; worse case for warming would be that 
this afternoon's low clouds manage to hang around in the morning, 
but increasing southerly surface winds should advect them back out 
of the area for the afternoon. 


Cold front will sweep through the region Wednesday night, with the 
resultant cold advection only allowing a minimal daytime rebound 
during the day on Thursday. I have also continued some slight 
chance pops late Wednesday night and into Thursday morning as 
shortwave drops into the mid-Mississippi Valley, but moisture 
certainly looks scant at this time. 


The chunk of cold air that pushes into the area on Thursday should 
continue to exert its influence on Friday, with highs about a 
category lower than those on Thursday. 


(Saturday-tuesday) 


Over the past few days models have come into much better agreement 
for this upcoming weekend, with upper low cutting off over the 
southwestern U.S. While fairly active westerlies continue from the 
Pacific NW, through the Mississippi Valley, into the East Coast. 
All medium range guidance now supports the idea that broad 
overrunning will develop in the wake of the cold surface ridge on 
Saturday, which should lead to at least a chance of precip over much 
of the area. However, a strong shortwave in the westerlies will add 
additional large scale lift Saturday night and into Sunday, and have 
upped pops a bit more during this time. 


While precip is looking more promising, still lots of unknowns about 
ptype. 850mb temps are genenerally below 0c and certainly on 
Saturday evaporative cooling should try to cool the lower levels of 
the air mass enough to support snow. However, forecast soundings are 
also suggesting low level temp profile will become isothermal at 
around 0c on Saturday night and Sunday, which suggests ptype go be 
either liquid or frozen. I have leaned ptype a bit more towards 
snow, but still kept some mention of a mix because of the above 
thermal profile. 


A large chunk of very cold air will drop into the region behind the 
weekend system, and by the start of the new work week we will likely 
be reminded that winter is certainly not over. Have stayed with 
initialization guidance for highs on Monday...generally ranging from 
the lower 20s to the lower 30s. 


Truett 


&& 


Aviation: (for the 18z tafs through 18z Wednesday afternoon) 
issued at 1032 am CST Tue Jan 27 2015 


Low level, MVFR cloudiness across eastern Iowa and much of Illinois still 
advecting southwestward late this morning. There has also been 
some diurnal development of cumulus or stratocumulus clouds 
further southwest which were impacting stl and cps. This diurnal 
development will likely continue this afternoon despite some 
subsidence across the area, so will need at least a tempo group in 
uin and the St Louis Metro area tafs for MVFR cigs at times. 
Surface winds will gradually veer around to a nely direction this 
afternoon, and then to an Ely direction this evening due to surface 
ridging strengthening across the Great Lakes and Ohio Valley 
regions tonight. As these winds take on a more E-nely component it 
may cause the low level cloud cover to advect back into uin and 
the St Louis Metro area late this afternoon or this evening. For 
now make keep prevailing conditions VFR during this time period, 
but will need to keep a close eye on satellite trends. Sely 
surface winds will strengthen late tonight and Wednesday morning 
as the surface pressure gradient tightens due to developing low 
pressure over the northern plains. 


Specifics for kstl: MVFR clouds have develped over stl and may 
continue for much of the afternoon. The more solid cloud cover 
east and north of stl may also try to advect back into stl late 
this afternoon and this evening. For now may keep cloud conditions 
scattered tonight, but would not be surprised if it GOES MVFR again 
for at least part of the night. The nly surface wind will 
gradually weaken and veer around to a nely direction late this 
afternoon, and to an Ely direction by late evening. The wind will 
intensify again Wednesday morning from a sely direction. 


Gks 


&& 


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


$$ 


Weather forecast office lsx 



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