Saint Peters, Missouri Weather Conditions

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Current Conditions

  • 67°
  • Scattered Clouds
  • Wind: Calm
  • Humidity: 87%
  • Visibility: 10.0 miles
  • Dew Point: 63°
  • Pressure: 30.06 in. 0

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Next 12 Hours

10  am
1  pm
4  pm
7  pm
10  pm
Partly Cloudy
Partly Cloudy
Thunderstorm
T-storms
Thunderstorm
T-storms
Chance of a Thunderstorm
Chance of T-storms
Partly Cloudy
Partly Cloudy
77°
82°
82°
79°
68°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Thunderstorm
  • High: 86 °
  • Low: 57 °
  • T-Storms
  • Saturday
  • Partly Cloudy
  • High: 86 °
  • Low: 59 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 84 °
  • Low: 59 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 90 °
  • Low: 64 °
  • Partly Cloudy
  • Tuesday
  • Mostly Cloudy
  • High: 88 °
  • Low: 66 °
  • Mostly Cloudy

Forecast for Saint Peters, Missouri

Updated: 10:00 AM CDT on August 01, 2014

  • Friday

    Partly cloudy in the morning, then overcast with thunderstorms and rain showers. High of 86F. Winds less than 5 mph. Chance of rain 30%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 57F. Winds less than 5 mph.

  • Saturday

    Partly cloudy. High of 86F. Winds from the NNE at 5 to 10 mph.

  • Saturday Night

    Overcast. Low of 59F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. High of 84F. Winds from the ENE at 5 to 10 mph.

  • Sunday Night

    Partly cloudy in the evening, then clear. Low of 59F. Winds less than 5 mph.

  • Monday

    Clear in the morning, then partly cloudy. High of 90F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy in the evening, then clear. Low of 64F. Winds from the SE at 5 to 10 mph.

  • Tuesday

    Mostly cloudy. High of 88F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Low of 66F. Winds from the SSE at 5 to 10 mph.

  • Wednesday

    Mostly cloudy. High of 86F. Winds from the SSW at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 64F. Winds from the South at 5 to 10 mph.

  • Thursday

    Overcast with a chance of a thunderstorm. High of 86F. Winds from the SSW at 10 to 15 mph. Chance of rain 20%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Low of 72F. Winds from the SW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Friday

    Mostly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 59F. Winds less than 5 mph.

  • Saturday

    Overcast with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday Night

    Overcast with a chance of a thunderstorm. Fog overnight. Low of 59F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Partly cloudy with a chance of a thunderstorm. High of 84F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Monday

    Partly cloudy with a chance of a thunderstorm. High of 84F. Winds less than 5 mph. Chance of rain 40%.

  • Monday Night

    Clear. Fog overnight. Low of 61F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: St. Peters, St. Peters, MO

Updated: 8:51 AM CDT

Temperature: 72.4 °F Dew Point: 67 °F Humidity: 84% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Harmony Ridge, Cottleville, MO

Updated: 8:50 AM CDT

Temperature: 72.3 °F Dew Point: 65 °F Humidity: 77% Wind: ESE at 1.7 mph Pressure: 29.97 in Hourly Precipitation: - Heat Index: 73 °F Graphs

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

Updated: 8:52 AM CDT

Temperature: 72.5 °F Dew Point: 71 °F Humidity: 94% Wind: Calm Pressure: 30.26 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: West Drive, St. Peters, MO

Updated: 8:48 AM CDT

Temperature: 71.1 °F Dew Point: 67 °F Humidity: 84% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Pennial Park, O'Fallon, MO

Updated: 8:50 AM CDT

Temperature: 81.5 °F Dew Point: 65 °F Humidity: 57% Wind: SSW at 2.0 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Foxborough Estates, St. Charles, MO

Updated: 8:52 AM CDT

Temperature: 77.6 °F Dew Point: 67 °F Humidity: 71% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: COTTLEVILLE/HARVESTER, St. Charles, MO

Updated: 8:52 AM CDT

Temperature: 76.3 °F Dew Point: 68 °F Humidity: 75% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Piggy's BBQ, OFallon, MO

Updated: 8:50 AM CDT

Temperature: 74.3 °F Dew Point: 67 °F Humidity: 78% Wind: West at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Ofallon Civic Park, Ofallon, MO

Updated: 8:51 AM CDT

Temperature: 73.5 °F Dew Point: 68 °F Humidity: 82% Wind: ESE at 1.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Wilshire Valley, St. Charles, MO

Updated: 8:47 AM CDT

Temperature: 72.1 °F Dew Point: 60 °F Humidity: 66% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Saint Charles Hills, Saint Charles, MO

Updated: 8:52 AM CDT

Temperature: 73.7 °F Dew Point: 67 °F Humidity: 80% Wind: NE at 1.2 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Harvester, St. Charles, MO

Updated: 8:39 AM CDT

Temperature: 75.5 °F Dew Point: 69 °F Humidity: 80% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Danielle Downs, St. Peters, MO

Updated: 8:52 AM CDT

Temperature: 82.4 °F Dew Point: 73 °F Humidity: 73% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Hyland Green, O'Fallon, MO

Updated: 8:52 AM CDT

Temperature: 73.9 °F Dew Point: 71 °F Humidity: 90% Wind: Calm Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Royal Oaks, O'Fallon, MO

Updated: 8:52 AM CDT

Temperature: 73.1 °F Dew Point: 68 °F Humidity: 83% Wind: SSE at 3.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Austin Ridge, Saint Charles, MO

Updated: 8:51 AM CDT

Temperature: 71.5 °F Dew Point: 68 °F Humidity: 87% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: The Boardwalk at WingHaven, OFallon, MO

Updated: 8:44 AM CDT

Temperature: 72.0 °F Dew Point: 68 °F Humidity: 86% Wind: SSW at 2.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Dardenne Prairie, Dardenne Prairie, MO

Updated: 8:48 AM CDT

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

Location: Lindenwood, St. Charles, MO

Updated: 8:52 AM CDT

Temperature: 71.3 °F Dew Point: 67 °F Humidity: 86% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Ridgepointe-Meadowbrook, Lake Saint Louis, MO

Updated: 8:51 AM CDT

Temperature: 73.9 °F Dew Point: 68 °F Humidity: 80% Wind: SSW at 2.7 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Locksley Manor, Lake Saint Louis, MO

Updated: 8:52 AM CDT

Temperature: 70.0 °F Dew Point: 67 °F Humidity: 91% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 8:52 AM CDT

Temperature: 71.3 °F Dew Point: 68 °F Humidity: 89% Wind: West at 1.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Creve Coeur Airport, Maryland Heights, MO

Updated: 8:45 AM CDT

Temperature: 74.2 °F Dew Point: 68 °F Humidity: 80% Wind: South at 1.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Crimson Oaks, Lake Saint Louis, MO

Updated: 8:47 AM CDT

Temperature: 78.2 °F Dew Point: 70 °F Humidity: 77% Wind: SSW at 1.4 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Chesterfield (East), Chesterfield, MO

Updated: 8:52 AM CDT

Temperature: 72.4 °F Dew Point: 68 °F Humidity: 85% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Avondale, Wentzville, MO

Updated: 8:41 AM CDT

Temperature: 69.2 °F Dew Point: 69 °F Humidity: 99% Wind: South at 1.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Swaying Oaks, Wentzville, MO

Updated: 8:52 AM CDT

Temperature: 79.3 °F Dew Point: 59 °F Humidity: 50% Wind: NNE at 1.4 mph Pressure: 29.47 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Creve Coeur, St. Louis, MO

Updated: 8:52 AM CDT

Temperature: 71.6 °F Dew Point: 67 °F Humidity: 86% Wind: Calm Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Whispering Hills, Creve Coeur, MO

Updated: 8:52 AM CDT

Temperature: 71.2 °F Dew Point: 66 °F Humidity: 84% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 70 °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 
704 am CDT Fri Aug 1 2014 


Short term: (through late this afternoon) 
issued at 320 am CDT Fri Aug 1 2014 


Primary forecast issue for today is pops. Dirty surface ridge 
remains in control of the weather today. A shortwave will pass over 
the area on northwest flow aloft. Looks like a combination of broad 
mid-level lift ahead of the shortwave and weak low level moisture 
convergence east of the surface-850mb reflection of the shortwave 
which is causing the precip currently over northwest Missouri. 
Expect these features to continue to migrate southeastward through 
the day, and short-range guidance has the shortwave sharpening up as 
it approaches the base of the longwave trof east of the 
Mississippi. All short-range guidance has precip over the area to a 
greater or lesser extent today, so have increasing pops through the 
day from slight chance to chance category as diurnal heating becomes 
a greater factor. However, with the lack of a true surface trigger 
have kept pops at 30% or less. This may ultimately need to be 
increased if afternoon thunderstorms can get organized into 
clusters. This is certainly possible if forecast SBCAPE 1000-2000 
j/kg is realized. Highs today will be highly dependent on cloud 
cover and afternoon precip. Used a combination of persistence and 
MOS which yielded temperatures a degree or two cooler than yesterday 
in the low to mid 80s. Still relatively mild for August 1st. 


Carney 


Long term: (tonight through thursday) 
issued at 320 am CDT Fri Aug 1 2014 


A longwave upper trough will persist over eastern North America thru 
Tuesday, although it will slowly de-amplify heading into early next 
week. Some upper level disturbances from this resultant northwest flow can 
be expected early, with one this evening--a leftover from today--and 
another possibly rolling down for Saturday. What does develop today 
should carryover a bit into this evening and maintained a 
mentionable slight chance pop until about 9pm with the loss of 
heating and upper level support moving downstream then should shut 
things down. Another upper level disturbance may slide down on 
Saturday as well, although the signals for this are considerably 
less clear and moisture should be a bit more limited than with the 
first disturbance today with the latter taking some of the moisture 
with it as they are oft to do in the wake of passage of an upper 
trough axis. Kept some low pops around for Saturday, maintaining the 
timing of late morning and afternoon, but trimmed its expanse and 
confined more to the Eastern Ozarks and southwest Illinois. 


Otherwise, lack of upper level support and surface fronts with 
marginal levels of moisture for August will result in pops largely 
being a wash and favor values below climo--climo being around 20%. 


By mid-late next week, a storm over the upper Midwest appears to get 
caught in the upper level "undertow" and stalls as the overall 
regime becomes more zonal and split, and so not as progressive as 
one might initially think. A warm frontal boundary appears to 
extend into the area late Wednesday with approach of a cold front on 
Thursday representing the best widespread chance for rain over the 
next seven days--with pops to show for it--about 40%. 


Max temps on Thursday were already within 2-3 degrees of normal and 
should effectively be at normal values by the latter half of the 
weekend and will even edge above normal for a period next week 
before another return of some cooler air for late week. 


Tes 


&& 


Aviation: (for the 12z tafs through 12z Saturday morning) 
issued at 644 am CDT Fri Aug 1 2014 


Primary concern this morning is areas of fog and low ceilings 
across the Eastern Ozarks extending northeast into southwest 
Illinois. Fog is trying to trickle into the southern portions of 
the St. Louis Metro area. Within these areas, widespread IFR with 
visibilities at or below 2sm and ceilings as low as 200ft prevail. 
Expect flight conditions to improve between 12z-14z. After that, 
VFR flight conditions are expected to prevail with light and 
variable wind. An upper level disturbance will produce widely scattered 
showers and thunderstorms later today. A few of the storms will 
likely be strong enough to produce isolated MVFR or even IFR 
conditions in moderate to heavy rain. Expect showers and storms to 
dissipate quickly after sunset. Fog will be possible again late tonight. 


Specifics for kstl: 


Expect VFR flight conditions to prevail at Lambert today. Fog/low 
ceilings are expected to stay south of the terminal. Attention 
turns to this afternoon when an upper level disturbance is 
expected to produce widely scattered showers and thunderstorms. 
Think it will be hit and miss in the stl Metro area, but if a 
storm does drift over the terminal visibility could briefly.Drop 
below VFR. Expect VFR to prevail tonight. If the terminal does 
receive rain, there could be some light fog late. 


Carney 


&& 


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


$$ 


Weather forecast office lsx 



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