Saint Peters, Missouri Weather Conditions

Severe Weather Alerts

National Weather Service:

Flood Warning View All Alerts

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

  • 83°
  • Overcast
  • Wind: West 8 mph
  • Humidity: 65%
  • Visibility: 10.0 miles
  • Dew Point: 70°
  • Pressure: 29.85 in. 0
  • Heat Index: 87

Select a Section

Click a section below for more information.

Next 12 Hours

5  pm
8  pm
11  pm
2  am
5  am
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
Overcast
Overcast
Chance of Rain
Chance of Rain
83°
79°
73°
71°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 85 °
  • Low: 68 °
  • Partly Cloudy
  • Wednesday
  • Thunderstorm
  • High: 77 °
  • Low: 67 °
  • T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 79 °
  • Low: 64 °
  • Chance of T-Storms
  • Friday
  • Chance of a Thunderstorm
  • High: 79 °
  • Low: 65 °
  • Chance of T-Storms
  • Saturday
  • Chance of a Thunderstorm
  • High: 83 °
  • Low: 67 °
  • Chance of T-Storms

Forecast for Saint Peters, Missouri

Updated: 1:04 PM CDT on January 30, 2015

  • Tuesday

    Partly cloudy. High around 85F. Winds WNW at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy skies this evening will give way to occasional showers overnight. Low 68F. Winds light and variable. Chance of rain 50%.

  • Wednesday

    Showers and thunderstorms - some locally heavy downpours are possible, especially in the afternoon. A few storms may be severe. High 77F. Winds SSW at 5 to 10 mph. Chance of rain 100%. 1 to 2 inches of rain expected.

  • Wednesday Night

    Thunderstorms likely. A few storms may be severe. Low 67F. Winds light and variable. Chance of rain 90%. Rainfall possibly over one inch.

  • Thursday

    Mixed clouds and sun with scattered thunderstorms. High 79F. Winds NE at 5 to 10 mph. Chance of rain 60%.

  • Thursday Night

    Mostly cloudy skies early, then partly cloudy after midnight. A stray shower or thunderstorm is possible. Low 64F. Winds light and variable.

  • Friday

    Partly to mostly cloudy with scattered showers and thunderstorms developing in the afternoon. High 79F. Winds ENE at 5 to 10 mph. Chance of rain 50%.

  • Friday Night

    Partly cloudy skies. Low around 65F. Winds light and variable.

  • Saturday

    Scattered clouds with the possibility of an isolated thunderstorm developing during the afternoon. High 83F. Winds light and variable. Chance of rain 30%.

  • Saturday Night

    Partial cloudiness early, with scattered showers and thunderstorms later during the night. Low 67F. Winds light and variable. Chance of rain 50%.

  • Sunday

    Scattered showers and thunderstorms. High near 85F. Winds SSW at 5 to 10 mph. Chance of rain 50%.

  • Sunday Night

    Partly cloudy in the evening followed by scattered thunderstorms after midnight. Low around 70F. Winds SW at 5 to 10 mph. Chance of rain 50%.

  • Monday

    Mixed clouds and sun with scattered thunderstorms. High 86F. Winds SW at 5 to 10 mph. Chance of rain 50%.

  • Monday Night

    Scattered thunderstorms. Low around 70F. Winds light and variable. Chance of rain 50%.

  • Tuesday

    Sun and clouds mixed with a slight chance of thunderstorms during the afternoon. High 84F. Winds WSW at 5 to 10 mph. Chance of rain 30%.

  • Tuesday Night

    Mostly cloudy with showers and a few thunderstorms. Low 69F. Winds light and variable. Chance of rain 50%.

  • Wednesday

    Partly to mostly cloudy with isolated thunderstorms developing during the afternoon. High around 85F. Winds WNW at 5 to 10 mph. Chance of rain 30%.

  • Wednesday Night

    Generally fair. Low 68F. Winds light and variable.

  • Thursday

    Mostly cloudy skies early, then partly cloudy in the afternoon. High 87F. Winds SW at 5 to 10 mph.

  • Thursday Night

    A few clouds from time to time. Low 67F. Winds light and variable.

  • Friday

    Variable clouds with scattered thunderstorms. High 86F. Winds SW at 5 to 10 mph. Chance of rain 40%.

  • Friday Night

    Scattered showers and thunderstorms. Low 69F. Winds light and variable. Chance of rain 40%.

Severe Weather Alert Descriptions

 Flood Warning  Statement as of 11:07 am CDT on June 30, 2015


The Flood Warning continues for
the Mississippi River at Alton ld26
* until further notice.
* At 10:30 am Tuesday the stage was 32.2 feet.
* Flood stage is 21.0 feet.
* Moderate flooding is occurring and moderate flooding is forecast.
* Forecast: the river will continue rising to near 32.3 feet by
early Wednesday morning. Additional rises may be possible
thereafter.
* Impact: at 31.5 feet... commercial basements in Alton begin to flood
within a foot of this height.
* Impact: at 30.5 feet... bloch marine service at The Harbor point
yacht club begins flooding within a foot of this level.

                   Fld latest 7 a.M. Forecast
location stg obs stg 07/01 07/02 07/03 07/04 07/05

Mississippi River
Alton ld26 21.0 32.21 32.3 31.6 30.2 28.6 27.0




Lat... Lon 3891 9033 3895 9028 3883 9003 3881 9017
      3886 9017






1107 am CDT Tue Jun 30 2015

The Flood Warning continues for
the Mississippi River at Grafton
* until further notice.
* At 10:30 am Tuesday the stage was 29.5 feet.
* Flood stage is 18.0 feet.
* Major flooding is occurring and major flooding is forecast.
* Forecast: the river will continue rising to near 29.6 feet by
Wednesday morning then begin falling.
* Impact: at 30.1 feet... water reaches the intersection of Main
Street and Maple street.
* Impact: at 29.1 feet... water reaches main at Church Street.
* Impact: at 29.0 feet... Route 100 between Grafton and Alton at
Clifton Terrace is flooded near this height.

                   Fld latest 7 a.M. Forecast
location stg obs stg 07/01 07/02 07/03 07/04 07/05

Mississippi River
Grafton 18.0 29.49 29.6 29.6 29.2 28.5 27.5




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






945 am CDT Tue Jun 30 2015

The Flood Warning continues for
the Missouri River at St. Charles
* until late Friday night.
* At 9:30 am Tuesday the stage was 29.3 feet.
* Flood stage is 25.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast: the river will continue to fall to below flood stage by
Friday morning.
* Impact: at 27.0 feet... the Katy trail begins flooding near this
height along hawning Road, about 2 miles north northeast of the
Highway 370 bridge.
* Impact: at 26.5 feet... aubuchon Road begins flooding between teson
Road and Riverwood estates near this height.
* Impact: at 26.0 feet... Highway 94 begins flooding 1.5 miles SW of
Matson, MO.
* Impact: at 25.0 feet... flood stage. Minor flooding begins. The
right bank downstream overflows, flooding agricultural bottomland.
* Impact: at 21.0 feet... an access Road to farmland on Bonhomme
Island gets cut off above this height.


                   Fld latest 7 a.M. Forecast
location stg obs stg 07/01 07/02 07/03 07/04 07/05

Missouri River
St. Charles 25.0 29.34 28.4 26.7 24.9 23.8 22.9




Lat... Lon 3865 9078 3859 9072 3881 9017 3886 9018
      3891 9033








Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Saint Peters, Saint Peters, MO

Updated: 4:24 PM CDT

Temperature: 83.7 °F Dew Point: 71 °F Humidity: 66% Wind: West at 8.1 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Sunny Hill Estates, St. Peters, MO

Updated: 4:12 PM CDT

Temperature: 81.7 °F Dew Point: 64 °F Humidity: 56% Wind: SW at 1.1 mph Pressure: 29.79 in Hourly Precipitation: - Heat Index: 83 °F Graphs

Location: Saint Peters Hills, Saint Peters, MO

Updated: 4:24 PM CDT

Temperature: 82.8 °F Dew Point: 69 °F Humidity: 63% Wind: WSW at 2.9 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Hunters Valley, Saint Peters, MO

Updated: 4:13 PM CDT

Temperature: 84.4 °F Dew Point: 70 °F Humidity: 63% Wind: Calm Pressure: 29.85 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: Spencer Valley, Saint Peters, MO

Updated: 4:18 PM CDT

Temperature: 84.5 °F Dew Point: 72 °F Humidity: 66% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Park Charles South, Saint Peters, MO

Updated: 4:06 PM CDT

Temperature: 84.9 °F Dew Point: 72 °F Humidity: 69% Wind: North at - Pressure: 29.96 in Hourly Precipitation: - Heat Index: 92 °F Graphs

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

Updated: 4:17 PM CDT

Temperature: 83.7 °F Dew Point: 70 °F Humidity: 63% Wind: SW at 6.3 mph Pressure: 29.71 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 4:24 PM CDT

Temperature: 83.0 °F Dew Point: 70 °F Humidity: 65% Wind: North at 1.6 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 4:16 PM CDT

Temperature: 87.6 °F Dew Point: 72 °F Humidity: 61% Wind: ESE at 3.7 mph Pressure: 29.76 in Hourly Precipitation: - Heat Index: 95 °F Graphs

Location: McClay Trails, Saint Charles, MO

Updated: 4:16 PM CDT

Temperature: 86.9 °F Dew Point: 70 °F Humidity: 57% Wind: WNW at 3.8 mph Pressure: 29.64 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: Madison Park, Cottleville, MO

Updated: 4:24 PM CDT

Temperature: 84.4 °F Dew Point: 68 °F Humidity: 59% Wind: SW at 1.1 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

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

Updated: 4:24 PM CDT

Temperature: 83.1 °F Dew Point: 73 °F Humidity: 71% Wind: Calm Pressure: 29.48 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Public Works Department Building, OFallon, MO

Updated: 4:20 PM CDT

Temperature: 84.4 °F Dew Point: 68 °F Humidity: 58% Wind: WSW at 6.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 4:24 PM CDT

Temperature: 82.5 °F Dew Point: 73 °F Humidity: 70% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Pennial Park, O'Fallon, MO

Updated: 4:20 PM CDT

Temperature: 87.4 °F Dew Point: 69 °F Humidity: 54% Wind: WNW at 4.7 mph Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 4:24 PM CDT

Temperature: 85.0 °F Dew Point: 71 °F Humidity: 63% Wind: SW at 2.0 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 4:24 PM CDT

Temperature: 83.7 °F Dew Point: 69 °F Humidity: 61% Wind: SW at 5.1 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 4:20 PM CDT

Temperature: 83.4 °F Dew Point: 70 °F Humidity: 63% Wind: NW at 5.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 4:24 PM CDT

Temperature: 83.3 °F Dew Point: 71 °F Humidity: 66% Wind: NW at 2.0 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Ridgetop Estates, OFallon, MO

Updated: 4:13 PM CDT

Temperature: 85.6 °F Dew Point: 69 °F Humidity: 57% Wind: NE at 5.3 mph Pressure: 29.96 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 4:17 PM CDT

Temperature: 81.9 °F Dew Point: 58 °F Humidity: 44% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 4:24 PM CDT

Temperature: 86.1 °F Dew Point: 70 °F Humidity: 59% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

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

Updated: 4:12 PM CDT

Temperature: 88.0 °F Dew Point: 69 °F Humidity: 54% Wind: NNE at 5.3 mph Pressure: 29.60 in Hourly Precipitation: - Heat Index: 93 °F Graphs

Location: Carriage Cove Court, Saint Charles, MO

Updated: 4:22 PM CDT

Temperature: 80.8 °F Dew Point: 80 °F Humidity: 99% Wind: North at - Pressure: 29.78 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: Magnolia, OFallon, MO

Updated: 4:18 PM CDT

Temperature: 88.0 °F Dew Point: 71 °F Humidity: 57% Wind: WNW at 2.7 mph Pressure: 29.58 in Hourly Precipitation: - Heat Index: 94 °F Graphs

Location: Woodcliff, Saint Charles, MO

Updated: 4:13 PM CDT

Temperature: 87.6 °F Dew Point: 79 °F Humidity: 75% Wind: WSW at 3.7 mph Pressure: 29.49 in Hourly Precipitation: - Heat Index: 102 °F Graphs

Location: Twin Chimneys, O'Fallon, MO

Updated: 4:20 PM CDT

Temperature: 85.9 °F Dew Point: 72 °F Humidity: 63% Wind: East at 4.0 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Huntington Downs, Saint Charles, MO

Updated: 4:20 PM CDT

Temperature: 85.3 °F Dew Point: 71 °F Humidity: 62% Wind: North at - Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Royal Oaks, O'Fallon, MO

Updated: 4:24 PM CDT

Temperature: 82.7 °F Dew Point: 71 °F Humidity: 67% Wind: NW at 2.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Little Oaks Drive, O'Fallon, MO

Updated: 4:20 PM CDT

Temperature: 84.0 °F Dew Point: 73 °F Humidity: 70% Wind: North at - Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Talbridge, St. Charles, MO

Updated: 4:24 PM CDT

Temperature: 84.7 °F Dew Point: 70 °F Humidity: 62% Wind: WSW at 2.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 4:10 PM CDT

Temperature: 83.9 °F Dew Point: 72 °F Humidity: 67% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: The Boardwalk at WingHaven, OFallon, MO

Updated: 4:13 PM CDT

Temperature: 82.6 °F Dew Point: 70 °F Humidity: 67% Wind: West at 2.9 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Conch Terrace, O'Fallon, MO

Updated: 4:22 PM CDT

Temperature: 85.3 °F Dew Point: 73 °F Humidity: 66% Wind: North at - Pressure: 29.96 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: Dardenne Prairie, Dardenne Prairie, MO

Updated: 4:24 PM CDT

Temperature: 84.2 °F Dew Point: 70 °F Humidity: 62% Wind: SSW at 3.1 mph Pressure: 29.55 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Lindenwood, St. Charles, MO

Updated: 4:23 PM CDT

Temperature: 81.6 °F Dew Point: 72 °F Humidity: 72% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Doris Avenue, O'Fallon, MO

Updated: 4:21 PM CDT

Temperature: 86.5 °F Dew Point: 75 °F Humidity: 69% Wind: North at - Pressure: 29.96 in Hourly Precipitation: - Heat Index: 96 °F Graphs

Location: New Town St Charles, Saint Charles, MO

Updated: 4:12 PM CDT

Temperature: 85.3 °F Dew Point: 67 °F Humidity: 55% Wind: NW at 7.8 mph Pressure: 29.83 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Locksley Manor, Lake Saint Louis, MO

Updated: 4:24 PM CDT

Temperature: 85.8 °F Dew Point: 68 °F Humidity: 56% Wind: Calm Pressure: 30.59 in Hourly Precipitation: 0.00 in Heat Index: 89 °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 
issued by National Weather Service Kansas City/Pleasant Hill MO 
359 PM CDT Tue Jun 30 2015 


Short term: (through late tonight) 
issued at 358 PM CDT Tue Jun 30 2015 


Most of the period will be fairly benign before an anticipated 
upstream mesoscale convective system approaches central MO well after midnight. 


A weak cold front edging southward through central Illinois has a few 
isolated cells along it that are mainly diurnally driven. A few of 
these could graze a few of the central Illinois counties prior to sunset. 
Otherwise, expect a smoke-filled cloud cover through the evening. 


Model consensus continues to point towards a nocturnal mesoscale convective system forming 
over eastern NE/western Iowa late this evening as a southwesterly 
low-level jet ramps up over the Central Plains. The cross flow over 
a h8 thermal gradient should provide strong moist ascent and provide 
the necessary fuel for the developing mesoscale convective system. Under a northwesterly 
steering flow this activity is expected to track southeast and enter 
the central MO counties after midnight...probably closer to 09z. 


Mj 


Long term: (wednesday through next tuesday) 
issued at 358 PM CDT Tue Jun 30 2015 


A couple rounds of active storms with attendant mesoscale convective system will be the 
primary concern Wednesday into Thursday. With pws ramping up to 
well over 2"(lying between two Standard deviations above normal 
and the 99th percentile) plus a veering low level jet a northwest- 
southeast corridor of central MO counties lies within a favored 
region for repeated rounds of convection. The first one will be 
ongoing Wednesday morning. Some debate as to how the mesoscale convective system will 
evolve Wednesday as model qpf consensus points to the mesoscale convective system turning 
more east towards stl. However, with the likelihood of a cold pool 
forming and becoming dominant under a northwesterly flow the 
heaviest rains should tend to push more south than east. 


As the above mesoscale convective system weakens during the day under a weakening h8 jet 
there should be a lull in the action until later Wednesday evening 
when we rinse, wash and repeat as the nocturnal low-level jet 
reforms. Another mesoscale convective system is expected to form over central MO, just where 
is likely dependent on where any outflow boundaries end up. Central 
MO is the most likely region. So, based on the above have gone with 
a Flash Flood Watch for parts of central MO. 


From Thursday through Sunday shortwave troughs dropping down the 
front side of an upper ridge over The Rockies will remain a nuisance 
generating off and on threats of convection. Temperatures are 
expected to be below normal early in the period before gradually 
warming late in the Holiday weekend. 




Mj 


&& 


Aviation:none 
&& 


Lsx watches/warnings/advisories: 
MO...Flash Flood Watch from Wednesday morning through Thursday 
morning for Crawford MO-Franklin MO-Gasconade MO-Iron MO- 
Jefferson MO-Madison MO-Montgomery MO-Reynolds MO-St. 
Francois MO-Ste. Genevieve MO-Warren MO-Washington MO. 


Flash Flood Watch from 1 am CDT Wednesday through Thursday 
morning for Boone MO-Callaway MO-Cole MO-Moniteau MO-Osage 
MO. 


Illinois...none. 
&& 


$$ 


Weather forecast office lsx 



National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Powered by the Weather Underground, Inc.