Saint Peters, Missouri Weather Conditions

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Current Conditions

  • 29°
  • Overcast
  • Wind: East 4 mph
  • Humidity: 82%
  • Visibility: 10.0 miles
  • Dew Point: 24°
  • Pressure: 30.33 in. 0
  • Heat Index: 25

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Next 12 Hours

12  am
3  am
6  am
9  am
12  pm
Chance of Snow
Chance of Snow
Chance of Snow
Chance of Snow
Snow
Snow
Snow
Snow
Ice Pellets
Ice Pellets
32°
30°
30°
30°
30°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Ice Pellets
  • High: 34 °
  • Low: 28 °
  • Ice Pellets
  • Friday
  • Mostly Cloudy
  • High: 37 °
  • Low: 28 °
  • Mostly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 39 °
  • Low: 30 °
  • Partly Cloudy
  • Sunday
  • Mostly Cloudy
  • High: 43 °
  • Low: 32 °
  • Mostly Cloudy
  • Monday
  • Chance of Snow
  • High: 45 °
  • Low: 34 °
  • Chance of Snow

Forecast for Saint Peters, Missouri

Updated: 9:00 PM CST on December 17, 2014

  • Thursday

    Overcast with snow, then ice pellets and a chance of snow in the afternoon. High of 34F. Winds less than 5 mph. Chance of precipitation 80% .

  • Thursday Night

    Overcast. Low of 28F. Winds less than 5 mph.

  • Friday

    Mostly cloudy. High of 37F. Winds less than 5 mph.

  • Friday Night

    Mostly cloudy in the evening, then overcast. Low of 28F. Winds less than 5 mph.

  • Saturday

    Overcast in the morning, then partly cloudy. High of 39F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy in the evening, then overcast. Low of 30F. Winds less than 5 mph.

  • Sunday

    Overcast. High of 43F. Winds from the South at 5 to 15 mph.

  • Sunday Night

    Overcast. Low of 32F with a windchill as low as 25F. Winds from the South at 10 to 15 mph.

  • Monday

    Overcast with a chance of snow and rain showers, then a chance of rain in the afternoon. Fog early. High of 45F. Breezy. Winds from the South at 15 to 20 mph. Chance of precipitation 50% .

  • Monday Night

    Overcast. Fog overnight. Low of 34F. Winds from the SW at 10 to 15 mph.

  • Tuesday

    Overcast. High of 41F. Breezy. Winds from the WNW at 10 to 20 mph.

  • Tuesday Night

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

  • Wednesday

    Mostly cloudy. High of 34F with a windchill as low as 18F. Breezy. Winds from the WNW at 20 to 25 mph.

  • Wednesday Night

    Mostly cloudy. Low of 25F with a windchill as low as 12F. Breezy. Winds from the West at 15 to 25 mph.

  • Thursday

    Clear. High of 37F. Winds from the West at 5 to 20 mph.

  • Thursday Night

    Partly cloudy. Low of 28F. Winds less than 5 mph.

  • Friday

    Mostly cloudy. High of 36F with a windchill as low as 23F. Winds from the WNW at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Low of 23F. Winds from the NW at 5 to 10 mph.

  • Saturday

    Partly cloudy. High of 30F with a windchill as low as 14F. Winds from the NW at 5 to 10 mph.

  • Saturday Night

    Clear. Low of 21F. Winds from the NW at 5 to 10 mph.

  • Sunday

    Clear. High of 28F. Winds from the NW at 5 to 10 mph.

  • Sunday Night

    Clear. Low of 21F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: St. Peters, St. Peters, MO

Updated: 1:19 AM CST

Temperature: 29.7 °F Dew Point: 26 °F Humidity: 85% Wind: Calm Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

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

Updated: 1:08 AM CST

Temperature: 30.0 °F Dew Point: 26 °F Humidity: 84% Wind: SE at 1.7 mph Pressure: 30.16 in Hourly Precipitation: - Windchill: 30 °F Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 1:20 AM CST

Temperature: 30.8 °F Dew Point: 24 °F Humidity: 77% Wind: ENE at 2.0 mph Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 1:09 AM CST

Temperature: 30.0 °F Dew Point: 26 °F Humidity: 84% Wind: Calm Pressure: 30.19 in Hourly Precipitation: - Windchill: 30 °F Graphs

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

Updated: 1:20 AM CST

Temperature: 29.7 °F Dew Point: 23 °F Humidity: 75% Wind: East at 5.4 mph Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 24 °F Graphs

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

Updated: 1:19 AM CST

Temperature: 30.4 °F Dew Point: 25 °F Humidity: 81% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Public Works Department Building, OFallon, MO

Updated: 1:15 AM CST

Temperature: 31.0 °F Dew Point: 26 °F Humidity: 80% Wind: East at 1.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 1:20 AM CST

Temperature: 30.0 °F Dew Point: 26 °F Humidity: 83% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Pennial Park, O'Fallon, MO

Updated: 1:20 AM CST

Temperature: 29.4 °F Dew Point: 23 °F Humidity: 76% Wind: ENE at 2.0 mph Pressure: 30.20 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 1:20 AM CST

Temperature: 30.1 °F Dew Point: 26 °F Humidity: 86% Wind: ESE at 2.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 1:20 AM CST

Temperature: 30.2 °F Dew Point: 23 °F Humidity: 74% Wind: NNE at 4.9 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 1:20 AM CST

Temperature: 29.4 °F Dew Point: 25 °F Humidity: 84% Wind: East at 3.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

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

Updated: 1:20 AM CST

Temperature: 28.0 °F Dew Point: 21 °F Humidity: 75% Wind: East at 4.0 mph Pressure: 33.05 in Hourly Precipitation: 0.00 in Windchill: 23 °F Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 1:19 AM CST

Temperature: 29.3 °F Dew Point: 26 °F Humidity: 86% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 1:20 AM CST

Temperature: 30.3 °F Dew Point: 23 °F Humidity: 75% Wind: Calm Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

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

Updated: 1:06 AM CST

Temperature: 30.2 °F Dew Point: 25 °F Humidity: 81% Wind: SE at 4.2 mph Pressure: 30.16 in Hourly Precipitation: - Windchill: 26 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 1:06 AM CST

Temperature: 31.0 °F Dew Point: 26 °F Humidity: 83% Wind: ENE at 3.0 mph Pressure: 30.31 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Hyland Green, O'Fallon, MO

Updated: 1:20 AM CST

Temperature: 30.0 °F Dew Point: 24 °F Humidity: 77% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Twin Chimneys, O'Fallon, MO

Updated: 1:15 AM CST

Temperature: 29.9 °F Dew Point: 25 °F Humidity: 82% Wind: Calm Pressure: 30.21 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Royal Oaks, O'Fallon, MO

Updated: 1:20 AM CST

Temperature: 29.3 °F Dew Point: 25 °F Humidity: 85% Wind: NE at 3.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Little Oaks Drive, O'Fallon, MO

Updated: 1:16 AM CST

Temperature: 33.6 °F Dew Point: 26 °F Humidity: 75% Wind: North at - Pressure: 30.35 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 1:19 AM CST

Temperature: 29.7 °F Dew Point: 25 °F Humidity: 81% Wind: North at 3.1 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: The Boardwalk at WingHaven, OFallon, MO

Updated: 1:19 AM CST

Temperature: 30.6 °F Dew Point: 26 °F Humidity: 82% Wind: NNE at 2.9 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Dardenne Prairie, Dardenne Prairie, MO

Updated: 1:17 AM CST

Temperature: 29.2 °F Dew Point: 23 °F Humidity: 78% Wind: NE at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 1:19 AM CST

Temperature: 30.0 °F Dew Point: 26 °F Humidity: 83% Wind: Calm Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Ridgepointe-Meadowbrook, Lake Saint Louis, MO

Updated: 1:19 AM CST

Temperature: 30.7 °F Dew Point: 26 °F Humidity: 84% Wind: NNE at 2.0 mph Pressure: 30.28 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Historic Saint Charles, Saint Charles, MO

Updated: 1:20 AM CST

Temperature: 30.3 °F Dew Point: 26 °F Humidity: 83% Wind: Calm Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Locksley Manor, Lake Saint Louis, MO

Updated: 1:20 AM CST

Temperature: 29.8 °F Dew Point: 22 °F Humidity: 72% Wind: Calm Pressure: 30.85 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Fox Hill, Saint Charles, MO

Updated: 1:20 AM CST

Temperature: 28.9 °F Dew Point: 24 °F Humidity: 81% Wind: ENE at 2.7 mph Pressure: 29.70 in Hourly Precipitation: 2.56 in Windchill: 29 °F Graphs

Location: St. Paul (SJC), OFallon, MO

Updated: 1:19 AM CST

Temperature: 29.7 °F Dew Point: 26 °F Humidity: 85% Wind: ENE at 1.0 mph Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 1:15 AM CST

Temperature: 31.2 °F Dew Point: 26 °F Humidity: 82% Wind: South at 2.0 mph Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: CommuniTree Gardens Nursery, St. Louis, MO

Updated: 1:16 AM CST

Temperature: 30.7 °F Dew Point: 26 °F Humidity: 82% Wind: Calm Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Lake Saint Louis, Lake Saint Louis, MO

Updated: 1:20 AM CST

Temperature: 30.2 °F Dew Point: 26 °F Humidity: 84% Wind: ENE at 3.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: 30 °F 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 
1156 PM CST Wed Dec 17 2014 


Update: 
issued at 837 PM CST Wed Dec 17 2014 


Radar echoes approaching the southwestern portion of our forecast 
area this evening from southwestern MO. The weak reflectivities in 
our forecast area are not likely making it to the ground due to 
the dry layer around 900 mb in height. As the forcing increases 
over our area ahead of the main shortwave now extending from 
southeast Colorado southeast through the Texas Panhandle and upper level 
divergence increases between the approaching upper level jet 
streak over the Southern Plains and the stronger upper level jet 
streak over the Ohio Valley region, the lower levels will saturate 
allowing the precipitation to reach the ground. The precipitation 
may initially be a mix of snow and sleet across southeast MO, but 
should quickly transition to all snow due to evaporate and 
nocturnal cooling. The latest NAM model is a little slower with 
the onset of the precipitation with the precipitation not making 
it to cou or familiar until shortly after midnight, and not getting into 
the St Louis Metro area until almost 6 am. 


Gks 


&& 


Short term: (through Thursday night) 
issued at 231 PM CST Wed Dec 17 2014 


Lift ahead of an approaching shortwave will bring light snow to 
the area tonight and tomorrow morning. The lsx County Warning Area will be 
positioned beneath favorable upper level divergence (ler of an 
upper jet), and models also show frontogenesis developing between 
900-850 hpa across central and southeastern MO. Forecast snowfall 
amounts are less than 2 inches across the cwa, and some locations 
may not receive very much snow at all due to the initially dry 
levels between approximately 900-600 hpa (per ksgf/kilx 12z 
raobs) which must be overcome before precipitation can reach the 
ground. Surface temperatures are comparatively warm, and even 
minor accumulations may be limited to grassy/elevated surfaces. 
Any lingering snow should taper off after noon on Thursday, 
perhaps transitioning to drizzle due to the loss of ice crystals 
aloft. 


Other than the Novelty of seeing snowflakes, few impacts are 
expected. The Winter Weather Advisory will be maintained for 
collaboration purposes. 


Kanofsky 


Long term: (friday through next wednesday) 
issued at 231 PM CST Wed Dec 17 2014 


Our area may be too far north to receive much precipitation from 
the next system to move across the southern part of the US. The 
upper trough is forecast to move through MO/AR/la on Friday night, 
but the associated surface low will be hugging the Gulf Coast. 
Trended a bit lower and farther south with pops for Friday night. 


Nwp guidance points to additional systems which could bring rain 
or snow to the area on Sunday (passage of an upper trough), Sunday 
night into Monday (strengthening upstream vort max), and/or the 
middle of next week (closed low migrating into northern MO or 
southern ia), but there is too much variability attm for much more 
than broad-brushed pops at or below 40% with ra/sn. 


Kanofsky 


&& 


Aviation: (for the 06z tafs through 06z Thursday night) 
issued at 1137 PM CST Wed Dec 17 2014 


Snow will move kcou in the next 1-2 hours and into the St. Louis 
Metro area tafs between 9-12z. Still appears that conditions will 
drop to IFR or low MVFR within 1-3 hours after the onset of the 
snow. KUIN will see the onset of snow around 12z. Accumulations of 
snow is still expected to be around 1 inch at kcou and less at 
KUIN and the St. Louis Metro taf sites. The snow will switch over 
to drizzle during the afternoon before ending by late in the 
afternoon. IFR or low MVFR ceilings are expected through the end 
of the period. 


Specifics for kstl: snow is expected to move into the terminal 
after 09z with VFR conditions initially given dry air in the 
atmosphere. IFR conditions and steady snow is expected by 14z with 
an accumulation of less than 1 inch. The snow should switch over 
to drizzle by 18z with IFR ceilings lasting through the rest of 
the taf period. 


Britt 


&& 


Lsx watches/warnings/advisories: 
MO...Winter Weather Advisory until 10 am CST Thursday for Boone MO- 
Callaway MO-Cole MO-Crawford MO-Gasconade MO-Iron MO- 
Madison MO-Moniteau MO-Osage MO-Reynolds MO-St. Francois MO- 
Washington MO. 


Illinois...none. 
&& 


$$ 


Weather forecast office lsx 














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