Saint Charles, Missouri Weather Conditions

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Current Conditions

  • 85°
  • Partly Cloudy
  • Wind: North 10 mph
  • Humidity: 69%
  • Visibility: 10.0 miles
  • Dew Point: 74°
  • Pressure: 30.03 in. 0
  • Heat Index: 92

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Next 12 Hours

2  pm
5  pm
8  pm
11  pm
2  am
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
87°
85°
80°
74°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Mostly Cloudy
  • High: 88 °
  • Low: 65 °
  • Mostly Cloudy
  • Thursday
  • Clear
  • High: 90 °
  • Low: 67 °
  • Clear
  • Friday
  • Clear
  • High: 91 °
  • Low: 68 °
  • Clear
  • Saturday
  • Clear
  • High: 88 °
  • Low: 68 °
  • Clear
  • Sunday
  • Clear
  • High: 88 °
  • Low: 69 °
  • Clear

Forecast for Saint Charles, Missouri

Updated: 10:03 AM CDT on January 29, 2015

  • Wednesday

    Mostly cloudy. A stray shower or thunderstorm is possible. High 88F. Winds NNW at 10 to 15 mph.

  • Wednesday Night

    Partly cloudy skies. Low near 65F. Winds NNW at 5 to 10 mph.

  • Thursday

    Mainly sunny. High near 90F. Winds NW at 5 to 10 mph.

  • Thursday Night

    Clear skies. Low 67F. Winds light and variable.

  • Friday

    Sunny skies. High 91F. Winds NW at 5 to 10 mph.

  • Friday Night

    A few clouds overnight. Low 68F. Winds light and variable.

  • Saturday

    Sunny skies. High 88F. Winds NNW at 5 to 10 mph.

  • Saturday Night

    Mainly clear early, then a few clouds later on. Low 68F. Winds ESE at 5 to 10 mph.

  • Sunday

    Sunshine along with some cloudy intervals. High 88F. Winds SSW at 5 to 10 mph.

  • Sunday Night

    Mainly clear early, then a few clouds later on. Low 69F. Winds NW at 5 to 10 mph.

  • Monday

    A few passing clouds, otherwise generally sunny. High 91F. Winds WSW at 5 to 10 mph.

  • Monday Night

    Some clouds early will give way to generally clear conditions overnight. Low 69F. Winds NW at 10 to 15 mph.

  • Tuesday

    Except for a few afternoon clouds, mainly sunny. High 88F. Winds NNW at 5 to 10 mph.

  • Tuesday Night

    Some clouds and possibly an isolated thunderstorm after midnight. Low 68F. Winds ENE at 5 to 10 mph. Chance of rain 30%.

  • Wednesday

    Variable clouds with scattered showers and thunderstorms, mainly in the afternoon. High 86F. Winds SSE at 5 to 10 mph. Chance of rain 60%.

  • Wednesday Night

    Partly cloudy with late night showers or thunderstorms. Low 69F. Winds ESE at 5 to 10 mph. Chance of rain 60%.

  • Thursday

    Partly cloudy skies. High 87F. Winds SSE at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Low 69F. Winds ESE at 5 to 10 mph.

  • Friday

    Generally sunny despite a few afternoon clouds. High 88F. Winds SE at 5 to 10 mph.

  • Friday Night

    Scattered showers and thunderstorms. Low 69F. Winds SE at 5 to 10 mph. Chance of rain 40%.

  • Saturday

    A mix of clouds and sun with the chance of an isolated thunderstorm in the afternoon. High 87F. Winds SSE at 5 to 10 mph. Chance of rain 30%.

  • Saturday Night

    Scattered showers and thunderstorms. Low 69F. Winds E at 5 to 10 mph. Chance of rain 60%.

Severe Weather Alert Descriptions

 Flood Warning  Statement as of 12:43 PM CDT on July 29, 2015


The Flood Warning continues for
the Mississippi River at Grafton
* at 12:00 PM Wednesday the stage was 19.6 feet.
* Flood stage is 18.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* The river is forecast to fall below flood stage by Saturday morning.


                   Fld latest 7 a.M. Forecast
location stg obs stg 07/30 07/31 08/01 08/02 08/03

Mississippi River
Grafton 18.0 19.65 19.4 19.0 17.8 17.0 16.4




Lat... Lon 3881 9057 3888 9057 3899 9046 3895 9028
      3882 9048







Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: New Town St Charles, Saint Charles, MO

Updated: 12:40 PM CDT

Temperature: 88.7 °F Dew Point: 76 °F Humidity: 67% Wind: NE at 5.3 mph Pressure: 30.03 in Hourly Precipitation: - Heat Index: 100 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 12:51 PM CDT

Temperature: 86.5 °F Dew Point: 76 °F Humidity: 70% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 12:52 PM CDT

Temperature: 91.0 °F Dew Point: 73 °F Humidity: 56% Wind: WNW at 6.9 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Historic Saint Charles, Saint Charles, MO

Updated: 12:50 PM CDT

Temperature: 85.8 °F Dew Point: 75 °F Humidity: 71% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 12:52 PM CDT

Temperature: 86.5 °F Dew Point: 75 °F Humidity: 68% Wind: NNW at 1.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Polestar Boating Center, St. Charles, MO

Updated: 12:51 PM CDT

Temperature: 83.2 °F Dew Point: 75 °F Humidity: 77% Wind: WNW at 6.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 12:51 PM CDT

Temperature: 86.5 °F Dew Point: 74 °F Humidity: 67% Wind: SSE at 1.1 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Riverwood Place, Florissant, MO

Updated: 12:51 PM CDT

Temperature: 85.0 °F Dew Point: 74 °F Humidity: 71% Wind: West at 3.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 12:52 PM CDT

Temperature: 86.5 °F Dew Point: 77 °F Humidity: 71% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 12:47 PM CDT

Temperature: 85.8 °F Dew Point: 63 °F Humidity: 46% Wind: NE at 1.0 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Spencer Valley, Saint Peters, MO

Updated: 12:47 PM CDT

Temperature: 88.6 °F Dew Point: 77 °F Humidity: 68% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Alber Pointe Drive, Florissant, MO

Updated: 12:47 PM CDT

Temperature: 81.7 °F Dew Point: 80 °F Humidity: 96% Wind: North at - Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Riverside at Albers Pointe, Florissant, MO

Updated: 12:44 PM CDT

Temperature: 81.7 °F Dew Point: 80 °F Humidity: 96% Wind: North at - Pressure: 30.02 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: Hunters Valley, Saint Peters, MO

Updated: 12:43 PM CDT

Temperature: 91.6 °F Dew Point: 74 °F Humidity: 57% Wind: West at 3.2 mph Pressure: 30.03 in Hourly Precipitation: - Heat Index: 102 °F Graphs

Location: Saint Peters, Saint Peters, MO

Updated: 12:51 PM CDT

Temperature: 86.4 °F Dew Point: 75 °F Humidity: 70% Wind: NNE at 2.9 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Rule Place Court, Maryland Heights, MO

Updated: 12:47 PM CDT

Temperature: 86.7 °F Dew Point: 75 °F Humidity: 67% Wind: North at - Pressure: 29.87 in Hourly Precipitation: - Heat Index: 95 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 12:50 PM CDT

Temperature: 86.1 °F Dew Point: 78 °F Humidity: 76% Wind: NNE at 4.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Saint Peters Hills, Saint Peters, MO

Updated: 12:52 PM CDT

Temperature: 86.4 °F Dew Point: 74 °F Humidity: 66% Wind: WNW at 2.5 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Maryland Heights, MO

Updated: 12:51 PM CDT

Temperature: 87.1 °F Dew Point: 76 °F Humidity: 70% Wind: North at 1.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Woodcliff, Saint Charles, MO

Updated: 12:42 PM CDT

Temperature: 86.5 °F Dew Point: 83 °F Humidity: 90% Wind: WNW at 3.7 mph Pressure: 29.69 in Hourly Precipitation: - Heat Index: 107 °F Graphs

Location: Park Charles South, Saint Peters, MO

Updated: 12:46 PM CDT

Temperature: 85.3 °F Dew Point: 75 °F Humidity: 76% Wind: North at - Pressure: 30.14 in Hourly Precipitation: - Heat Index: 96 °F Graphs

Location: Fox Lake Meadows, Florissant, MO

Updated: 12:41 PM CDT

Temperature: 88.2 °F Dew Point: 74 °F Humidity: 64% Wind: WNW at 4.2 mph Pressure: 30.00 in Hourly Precipitation: - Heat Index: 98 °F Graphs

Location: McClay Trails, Saint Charles, MO

Updated: 12:43 PM CDT

Temperature: 96.1 °F Dew Point: 76 °F Humidity: 53% Wind: Calm Pressure: 29.82 in Hourly Precipitation: - Heat Index: 110 °F Graphs

Location: Carriage Cove Court, Saint Charles, MO

Updated: 12:47 PM CDT

Temperature: 84.7 °F Dew Point: 77 °F Humidity: 77% Wind: North at - Pressure: 29.96 in Hourly Precipitation: - Heat Index: 95 °F Graphs

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

Updated: 12:52 PM CDT

Temperature: 85.1 °F Dew Point: 76 °F Humidity: 74% Wind: WNW at 1.0 mph Pressure: 29.29 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Sunny Hill Estates, St. Peters, MO

Updated: 12:41 PM CDT

Temperature: 92.9 °F Dew Point: 69 °F Humidity: 46% Wind: NE at 2.7 mph Pressure: 29.98 in Hourly Precipitation: - Heat Index: 98 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 12:52 PM CDT

Temperature: 94.1 °F Dew Point: 77 °F Humidity: 58% Wind: South at 1.7 mph Pressure: 29.49 in Hourly Precipitation: 0.00 in Heat Index: 109 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 12:50 PM CDT

Temperature: 87.4 °F Dew Point: 72 °F Humidity: 60% Wind: WNW at 6.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Honeygrove Court, Saint Louis, MO

Updated: 12:46 PM CDT

Temperature: 83.7 °F Dew Point: 76 °F Humidity: 77% Wind: North at - Pressure: 30.06 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 12:41 PM CDT

Temperature: 85.6 °F Dew Point: 75 °F Humidity: 70% Wind: NNW at 4.7 mph Pressure: 29.95 in Hourly Precipitation: - Heat Index: 94 °F Graphs

Location: Public Works Department Building, OFallon, MO

Updated: 12:50 PM CDT

Temperature: 85.7 °F Dew Point: 74 °F Humidity: 67% Wind: SW at 3.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated 
National Weather Service St Louis MO 
1211 PM CDT Wednesday Jul 29 2015 


Update: 
issued at 1159 am CDT Wednesday Jul 29 2015 


Excessive heat warning will be cancelled shortly for a good chunk 
of the area. Clouds and and lower dewpoints are filtering in 
behind the front and it looks like 105 heat index values won't be 
achieved today. 


Carney 


&& 


Short term: (through late this afternoon) 
issued at 311 am CDT Wednesday Jul 29 2015 


08z surface analysis reveals that the eagerly-awaited cold front 
(and its noticeably less humid Post-frontal air mass) was 
tantalizingly close to the lsx County Warning Area early this morning. At 08z, 
the front stretched from central Kansas through extreme southeastern 
Nebraska and through central Iowa into western WI. A nocturnal mesoscale convective system ahead 
of the front was making steady southward progress but very slow 
eastward progress. Additional thunderstorms are possible with the 
front today as it moves into a moist and unstable air mass during 
the afternoon hours, and the outflow boundary may also serve as a 
trigger for afternoon sh/ts. 


Until the cold front arrives, there will be very little change in 
the soupy air mass still in place across the region. The timing 
of the cold front is such that roughly the southern to 
southeastern half of the County Warning Area should see another day of hot/humid 
conditions, albeit not as oppressive as yesterday. Heat index 
values should be closer to 105-109 in the worst areas today 
compared to the heat indices of 110-117 which were observed 
yesterday. Despite the slightly lower heat index values which are 
expected today, the excessive heat warning still looks appropriate 
because it is the cumulative exposure to excessive heat which 
negatively affects the human body, and today will be the third or 
fourth day of such conditions for some areas. 


Kanofsky 


Long term: (tonight through tuesday) 
issued at 311 am CDT Wednesday Jul 29 2015 


A two-day respite from the oppressive heat/humidity is expected 
on Thu/Fri. Temperatures should be seasonably warm (upper 80s to 
lower 90s), but the dew points will be much lower than they have 
been recently. 


The upper air pattern will have transitioned to northwest flow 
aloft by Friday due to the building ridge across the western Continental U.S. 
And a trough over the eastern Continental U.S.. models show that this northwest 
flow pattern remains unchanged through early next week. Although 
the models continue to show hints of a shortwave or two which 
could support convection (perhaps as early as Saturday night), 
confidence in the timing and placement of these features is low. 
Temperatures look seasonably warm in the upper 80s to lower 90s 
through the weekend and into early next week. 


Kanofsky 


&& 


Aviation: (for the 12z tafs through 12z Thursday morning) 
issued at 638 am CDT Wednesday Jul 29 2015 


Large convective complex that blanketed most of S Iowa and north MO late 
yesterday evening became outflow dominated shortly after 
05z...with main elements developing/propagating south-southwest while east edge 
remained q-stationary between Kirk-KUIN. 


In the short term...east edge of this dying precipitation area may clip 
KUIN over the next hour or so, while dry weather will prevail 
elsewhere. VFR conditions are anticipated...with clouds at or above 4kft. 


Current surface analysis and latest rap guidance suggests two 
boundaries that could provide focus for afternoon convection...the 
first is the outflow from the early morning convection which 
appears to be pushing through stl area at this time. The second boundary 
will be the actual synoptic front. Its current location is being 
masked by mesoscale impacts of overnight convection but it appears 
to be over S central/southeast Iowa...and rap suggests it will be with 
front near the stl metropolitan by midday. Convergence will be fairly 
weak but there should certainly be enough instability to carry 
current thunderstorms in the vicinity at stl metropolitan taf sites in the early afternoon. 
However...have dropped mention of thunderstorms in the vicinity at kcou since convergence 
along synoptic front should be south of that area. Prevailing 
conditions across the area for the afternoon hours should be scattered- 
broken cumulus 4-5kft (with greatest cloud cover near/south of cold 
front)...with this cumulus field quickly dissipating during the early 
evening with loss of heating and as the drier Post-frontal air 
advects into the area. 


Specifics for kstl: scattered clouds at or above 4kft are expected this 
morning...with cumulus field at or above 4kft becoming scattered-broken by late morning 
and into the afternoon. Have continued thunderstorms in the vicinity in the 18-21 time 
frame as synoptic front will be passing at that time. Cumulus field 
should quickly dissipate heading into the early evening...with 
a few clouds at or above 10kft overnight and into early Thursday. 


Truett 


&& 


Lsx watches/warnings/advisories: 
MO...excessive heat warning until 9 PM CDT this evening for Iron MO- 
Madison MO-Reynolds MO-St. Francois MO-Ste. Genevieve MO. 


Illinois...excessive heat warning until 9 PM CDT this evening for Marion Illinois- 
Randolph Illinois-Washington Illinois. 


&& 


$$ 


Weather forecast office lsx 



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