Saint Peters, Missouri Weather Conditions

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Current Conditions

  • 39°
  • Clear
  • Wind: Calm
  • Humidity: 86%
  • Visibility: 10.0 miles
  • Dew Point: 35°
  • Pressure: 29.98 in. 0

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Next 12 Hours

5  am
8  am
11  am
2  pm
5  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
44°
49°
66°
73°
74°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Clear
  • High: 76 °
  • Low: 60 °
  • Clear
  • Thursday
  • Thunderstorm
  • High: 72 °
  • Low: 53 °
  • T-Storms
  • Friday
  • Rain
  • High: 54 °
  • Low: 32 °
  • Rain
  • Saturday
  • Clear
  • High: 63 °
  • Low: 42 °
  • Clear
  • Sunday
  • Clear
  • High: 69 °
  • Low: 50 °
  • Clear

Forecast for Saint Peters, Missouri

Updated: 1:18 AM CDT on January 01, 2015

  • Wednesday

    A mainly sunny sky. High 76F. Winds SSE at 10 to 20 mph.

  • Wednesday Night

    Partly cloudy with late night showers or thunderstorms. Low around 60F. Winds S at 10 to 15 mph. Chance of rain 60%.

  • Thursday

    Thunderstorms - a few could contain very heavy rain, especially in the afternoon. A few storms may be severe. High 72F. Winds SW at 10 to 20 mph. Chance of rain 90%. 1 to 2 inches of rain expected.

  • Thursday Night

    Showers and thundershowers in the evening, then overcast overnight with occasional rain. A few storms may be severe. Low 53F. Winds N at 5 to 10 mph. Chance of rain 100%.

  • Friday

    Periods of rain. High 54F. Winds N at 15 to 25 mph. Chance of rain 90%. Rainfall near a half an inch.

  • Friday Night

    Partly cloudy skies. Low 32F. NW winds at 10 to 20 mph, decreasing to less than 5 mph.

  • Saturday

    Sunny skies. High 63F. Winds WSW at 10 to 15 mph.

  • Saturday Night

    A mostly clear sky. Low 42F. Winds SSW at 5 to 10 mph.

  • Sunday

    Generally sunny. High 69F. Winds SSW at 10 to 20 mph.

  • Sunday Night

    Partly cloudy skies early will become overcast later during the night. Low around 50F. Winds S at 5 to 10 mph.

  • Monday

    Rain showers early with overcast skies later in the day. High 69F. Winds S at 10 to 20 mph. Chance of rain 50%.

  • Monday Night

    Scattered thunderstorms in the evening. Partly cloudy skies overnight. Low 59F. Winds S at 10 to 15 mph. Chance of rain 60%.

  • Tuesday

    Cloudy skies early, then partly cloudy in the afternoon. High 73F. Winds SSW at 10 to 15 mph.

  • Tuesday Night

    Showers and a few thundershowers. Low 54F. Winds SSW at 10 to 15 mph. Chance of rain 60%.

  • Wednesday

    Partly cloudy early followed by increasing clouds with showers developing later in the day. High 62F. Winds NNE at 10 to 15 mph. Chance of rain 40%.

  • Wednesday Night

    Cloudy skies with a few showers later at night. Low 48F. Winds ENE at 5 to 10 mph. Chance of rain 30%.

  • Thursday

    Intervals of clouds and sunshine. High 66F. Winds N at 5 to 10 mph.

  • Thursday Night

    Mostly clear skies. Low 47F. Winds ESE at 5 to 10 mph.

  • Friday

    Light rain early...then remaining cloudy with showers in the afternoon. High 67F. Winds E at 5 to 10 mph. Chance of rain 60%.

  • Friday Night

    A few showers early with mostly cloudy conditions late. Low 47F. Winds ESE at 5 to 10 mph. Chance of rain 40%.

  • Saturday

    Mostly cloudy skies early, then partly cloudy in the afternoon. High 71F. Winds SE at 5 to 10 mph.

  • Saturday Night

    Partly cloudy. Low 49F. Winds ESE at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Wilshire Valley, St. Charles, MO

Updated: 4:16 AM CDT

Temperature: 54.0 °F Dew Point: 26 °F Humidity: 33% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 4:11 AM CDT

Temperature: 50.7 °F Dew Point: 36 °F Humidity: 56% Wind: Calm Pressure: 29.71 in Hourly Precipitation: - Windchill: - Graphs

Location: Talbridge, St. Charles, MO

Updated: 4:19 AM CDT

Temperature: 49.5 °F Dew Point: 37 °F Humidity: 62% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: 50 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 4:12 AM CDT

Temperature: 43.3 °F Dew Point: 39 °F Humidity: 83% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: West Drive, St. Peters, MO

Updated: 4:19 AM CDT

Temperature: 51.4 °F Dew Point: 38 °F Humidity: 58% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Carriage Cove Court, Saint Charles, MO

Updated: 4:16 AM CDT

Temperature: 51.3 °F Dew Point: 36 °F Humidity: 56% Wind: North at - Pressure: 29.88 in Hourly Precipitation: - Windchill: - Graphs

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

Updated: 4:19 AM CDT

Temperature: 55.8 °F Dew Point: 35 °F Humidity: 46% Wind: West at 4.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Lindenwood, St. Charles, MO

Updated: 4:18 AM CDT

Temperature: 51.0 °F Dew Point: 38 °F Humidity: 62% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 4:19 AM CDT

Temperature: 45.8 °F Dew Point: 36 °F Humidity: 67% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Huntington Downs, Saint Charles, MO

Updated: 4:16 AM CDT

Temperature: 45.9 °F Dew Point: 35 °F Humidity: 66% Wind: North at - Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: McClay Trails, Saint Charles, MO

Updated: 4:13 AM CDT

Temperature: 48.4 °F Dew Point: 35 °F Humidity: 60% Wind: Calm Pressure: 29.75 in Hourly Precipitation: - Windchill: 48 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 4:19 AM CDT

Temperature: 51.4 °F Dew Point: 38 °F Humidity: 59% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: CommuniTree Gardens Nursery, St. Louis, MO

Updated: 4:14 AM CDT

Temperature: 41.0 °F Dew Point: 38 °F Humidity: 89% Wind: Calm Pressure: 29.48 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Hunters Valley, Saint Peters, MO

Updated: 4:10 AM CDT

Temperature: 47.8 °F Dew Point: 36 °F Humidity: 64% Wind: Calm Pressure: 30.01 in Hourly Precipitation: - Windchill: 48 °F Graphs

Location: Park Charles South, Saint Peters, MO

Updated: 4:06 AM CDT

Temperature: 46.6 °F Dew Point: 35 °F Humidity: 70% Wind: North at - Pressure: 30.06 in Hourly Precipitation: - Windchill: 47 °F Graphs

Location: Saint Peters Hills, Saint Peters, MO

Updated: 4:19 AM CDT

Temperature: 51.6 °F Dew Point: 38 °F Humidity: 60% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 4:19 AM CDT

Temperature: 52.9 °F Dew Point: 36 °F Humidity: 52% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Earth City, Earth City, MO

Updated: 5:08 AM EDT

Temperature: 49.1 °F Dew Point: 40 °F Humidity: 70% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 49 °F Graphs

Location: St. Peters, St. Peters, MO

Updated: 4:19 AM CDT

Temperature: 43.3 °F Dew Point: 38 °F Humidity: 81% Wind: West at 2.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Maryland Heights, MO

Updated: 4:17 AM CDT

Temperature: 47.8 °F Dew Point: 39 °F Humidity: 71% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 4:18 AM CDT

Temperature: 45.1 °F Dew Point: 37 °F Humidity: 72% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 4:19 AM CDT

Temperature: 41.2 °F Dew Point: 38 °F Humidity: 88% Wind: Calm Pressure: 29.43 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 4:10 AM CDT

Temperature: 52.6 °F Dew Point: 37 °F Humidity: 56% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 4:13 AM CDT

Temperature: 42.3 °F Dew Point: 41 °F Humidity: 94% Wind: Calm Pressure: 29.87 in Hourly Precipitation: - Windchill: 42 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 4:19 AM CDT

Temperature: 46.3 °F Dew Point: 40 °F Humidity: 78% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Ross Ave, St. Louis, MO

Updated: 4:19 AM CDT

Temperature: 44.6 °F Dew Point: 34 °F Humidity: 67% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

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

Updated: 4:12 AM CDT

Temperature: 43.0 °F Dew Point: 38 °F Humidity: 83% Wind: Calm Pressure: 29.83 in Hourly Precipitation: - Windchill: 43 °F Graphs

Location: Quiet Village, Creve Coeur, MO

Updated: 4:19 AM CDT

Temperature: 50.4 °F Dew Point: 38 °F Humidity: 63% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Maryland Heights, St Louis, MO

Updated: 4:11 AM CDT

Temperature: 54.2 °F Dew Point: 37 °F Humidity: 53% Wind: Calm Pressure: 29.31 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Creve Coeur, Saint Louis, MO

Updated: 4:19 AM CDT

Temperature: 40.8 °F Dew Point: 40 °F Humidity: 95% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: Alpine Ridge, OFallon, MO

Updated: 4:19 AM CDT

Temperature: 42.7 °F Dew Point: 34 °F Humidity: 71% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

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

Updated: 4:19 AM CDT

Temperature: 43.5 °F Dew Point: 36 °F Humidity: 74% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Pennial Park, O'Fallon, MO

Updated: 4:15 AM CDT

Temperature: 41.7 °F Dew Point: 34 °F Humidity: 74% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: Public Works Department Building, OFallon, MO

Updated: 4:15 AM CDT

Temperature: 45.8 °F Dew Point: 38 °F Humidity: 75% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

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

Updated: 4:11 AM CDT

Temperature: 45.1 °F Dew Point: 39 °F Humidity: 79% Wind: Calm Pressure: 29.89 in Hourly Precipitation: - Windchill: 45 °F Graphs

Location: Ladue Meadows, Creve Coeur, MO

Updated: 4:19 AM CDT

Temperature: 46.4 °F Dew Point: 37 °F Humidity: 70% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Ridgetop Estates, OFallon, MO

Updated: 4:11 AM CDT

Temperature: 41.0 °F Dew Point: 37 °F Humidity: 87% Wind: Calm Pressure: 30.07 in Hourly Precipitation: - Windchill: 41 °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 
359 am CDT Wed Apr 1 2015 


Short term: (through late this afternoon) 
issued at 354 am CDT Wed Apr 1 2015 


An upper ridge axis will pass overhead today. At the surface, a 
boundary which was located near the MO/Arkansas border last night will 
be drawn northeastward as a warm front during the day in response 
to a developing low pressure system over the northern plains. The 
thermal ridge axis will be over central MO and good mixing 
conditions are forecast. Based on these factors, people in MO/Illinois 
can expect another day of unseasonably warm temperatures with 
afternoon highs reaching the mid to upper 70s. Attention then 
turns to fire wx. Although winds will be rather breezy at times 
due to the tightening pressure gradient, increasing dew points 
throughout the day will probably keep relative humidity values too high to meet 
red flag warning criteria but low enough to meet criteria for 
heightened fire danger. This will be mentioned in the fire weather 
forecast (fwf) and hazardous weather outlook (hwo) products. 


Kanofsky 


Long term: (tonight through tuesday) 
issued at 354 am CDT Wed Apr 1 2015 


One area of convection is possible late this afternoon and early 
tonight near the Eastern Ozarks where instability will be a bit 
higher compared to farther north. Another area of convection is 
expected to develop tonight near a cold front which will stretch 
from Kansas through Nebraska into Iowa. As decaying upstream convection moves 
southeastward, precipitation chances across the lsx County Warning Area will 
increase overnight, especially after midnight and especially 
across northeast MO/west central Illinois. Precipitable water values are forecast to be 
around 0.8-1" tonight, which is near the 75th percentile for April 
in this part of the country. 


The cold front will sag southward on Thu, eventually becoming 
oriented W-E. Ahead of the front, precipitable water values rise to around 1.3" by 
18z, which is at +2sd for April. Despite the cloud cover which 
will inhibit diurnal destabilization, an increasingly moist air 
mass will be spreading northeastward ahead of the cold front. Any 
breaks in the clouds will add to the instability. Another round of 
thunderstorms is expected to develop on Thursday afternoon, 
especially south of I-70. Some of the storms could be strong to 
severe based on forecasts of 40-60 kts of 0-6km bulk shear. The 
shear vectors are forecast to be oriented nearly parallel to the 
approaching cold front. 


The cold front's southward progress on Thu night may be delayed 
by a new surface low which develops on the tail end of the front 
in Kansas in response to an approaching shortwave. The surface low 
then rides along the boundary on Thu night and Fri, and the cold 
front finally sinks south of the area late Thu night or early Fri 
morning. 


Compared to the late Spring warmth of the last few days, fri's highs 
in the 50s and Fri night's lows in the mid-30s will seem like a 
blast of winter. Temperatures will begin to rebound slightly over 
the weekend after a surface high pressure center shifts southeast 
of the area and low-level flow becomes southwesterly around the 
back side of the high. The area remains beneath northwest flow 
aloft this weekend. Another low pressure system could bring 
precipitation to parts of MO/Illinois early next week. 


Kanofsky 


&& 


Aviation: (for the 06z tafs through 06z Wednesday night) 
issued at 1044 PM CDT Tue Mar 31 2015 


Little if any cloud cover expected this forecast period. There 
may be a few cirrus clouds, and also a few diurnal cumulus clouds 
Wednesday afternoon and early evening. Light surface winds in 
surface ridge axis will become S-sely late tonight. The wind will 
strengthen and become gusty during the day on Wednesday as the 
surface ridge shifts east of the region and a cold front moves 
southeastward through the northern plains causing the surface 
pressure gradient to tighten over our area. 


Specifics for kstl: little if any clouds for much of the period. 
There may be a few cirrus clouds, and also a few diurnal cumulus 
clouds Wednesday afternoon into the early evening. The light 
surface wind will veer around to a sely direction late tonight. 
The wind will strengthen and become gusty during the day on 
Wednesday. Mid-high level cloudiness will increase late Wednesday 
night due to an upper level disturbance and the approaching cold 
front. 


Gks 


&& 


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


$$ 


Weather forecast office lsx 












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