Herculaneum, Missouri Weather Conditions

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Current Conditions

  • 80°
  • Clear
  • Wind: WSW 5 mph
  • Humidity: 69%
  • Visibility: 10.0 miles
  • Dew Point: 69°
  • Pressure: 29.81 in. 0
  • Heat Index: 83

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Next 12 Hours

5  am
8  am
11  am
2  pm
5  pm
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
78°
77°
83°
90°
89°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Partly Cloudy
  • High: 92 °
  • Low: 71 °
  • Partly Cloudy
  • Tuesday
  • Overcast
  • High: 89 °
  • Low: 70 °
  • Overcast
  • Wednesday
  • Chance of a Thunderstorm
  • High: 80 °
  • Low: 69 °
  • Chance of T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 85 °
  • Low: 66 °
  • Chance of T-Storms
  • Friday
  • Chance of a Thunderstorm
  • High: 80 °
  • Low: 64 °
  • Chance of T-Storms

Forecast for Herculaneum, Missouri

Updated: 1:01 AM CDT on January 03, 2015

  • Monday

    Partly cloudy. A stray shower or thunderstorm is possible. High 92F. Winds NW at 10 to 15 mph.

  • Monday Night

    A few clouds. Low 71F. Winds light and variable.

  • Tuesday

    Cloudy. A stray shower or thunderstorm is possible. High 89F. Winds E at 5 to 10 mph.

  • Tuesday Night

    Scattered thunderstorms developing overnight. Low around 70F. Winds light and variable. Chance of rain 60%.

  • Wednesday

    Mixed clouds and sun with scattered thunderstorms. High near 80F. Winds ESE at 5 to 10 mph. Chance of rain 60%.

  • Wednesday Night

    Thunderstorms in the evening, then variable clouds overnight with still a chance of showers. Low 69F. Winds ESE at 5 to 10 mph. Chance of rain 90%.

  • Thursday

    Thunderstorms in the morning, then skies turning partly cloudy late. High around 85F. Winds NNE at 10 to 15 mph. Chance of rain 80%.

  • Thursday Night

    Mainly clear skies. Low 66F. Winds N at 5 to 10 mph.

  • Friday

    Scattered thunderstorms, especially in the morning. High around 80F. Winds ENE at 5 to 10 mph. Chance of rain 60%.

  • Friday Night

    Mostly clear skies. Low 64F. Winds NE at 5 to 10 mph.

  • Saturday

    Partly cloudy. High 84F. Winds NE at 5 to 10 mph.

  • Saturday Night

    A few isolated thunderstorms developing late. Low around 65F. Winds light and variable. Chance of rain 30%.

  • Sunday

    Isolated thunderstorms in the morning, then partly cloudy late. High near 85F. Winds ESE at 5 to 10 mph. Chance of rain 30%.

  • Sunday Night

    Partly cloudy with late night showers or thunderstorms. Low 69F. Winds SE at 5 to 10 mph. Chance of rain 50%.

  • Monday

    Showers in the morning, then clearing with ample sunshine in the afternoon. High 92F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Monday Night

    A mostly clear sky. Low 69F. Winds light and variable.

  • Tuesday

    A few clouds from time to time. High 91F. Winds W at 5 to 10 mph.

  • Tuesday Night

    Mostly clear skies. Low 68F. Winds SE at 5 to 10 mph.

  • Wednesday

    Scattered thunderstorms in the morning, then partly cloudy late. High 91F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Wednesday Night

    Partly cloudy with isolated thunderstorms possible. Low 69F. Winds light and variable. Chance of rain 30%.

  • Thursday

    Isolated thunderstorms in the morning, becoming mostly sunny late. High 91F. Winds SW at 5 to 10 mph. Chance of rain 30%.

  • Thursday Night

    Mostly clear skies during the evening will give way to isolated thunderstorms overnight. Low 68F. Winds light and variable. Chance of rain 30%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: APRSWXNET, Pevely, MO

Updated: 2:58 AM CDT

Temperature: 71 °F Dew Point: 70 °F Humidity: 98% Wind: Calm Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Imperial - Wellington Subdivision, Imperial, MO

Updated: 3:32 AM CDT

Temperature: 79.1 °F Dew Point: 71 °F Humidity: 76% Wind: NW at 3.5 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 3:32 AM CDT

Temperature: 73.7 °F Dew Point: 70 °F Humidity: 89% Wind: Calm Pressure: 29.70 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: summerfield, Imperial, MO

Updated: 3:32 AM CDT

Temperature: 77.9 °F Dew Point: 70 °F Humidity: 78% Wind: Calm Pressure: 29.58 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Main Street, Fults, IL

Updated: 3:30 AM CDT

Temperature: 75.0 °F Dew Point: 71 °F Humidity: 87% Wind: North at - Pressure: 29.47 in Hourly Precipitation: - Heat Index: 75 °F Graphs

Location: APRSWXNET, Sulphur Springs, MO

Updated: 2:58 AM CDT

Temperature: 79 °F Dew Point: 70 °F Humidity: 73% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Hillsboro, Missouri, Hillsboro, MO

Updated: 3:29 AM CDT

Temperature: 75.2 °F Dew Point: 69 °F Humidity: 81% Wind: Calm Pressure: 29.65 in Hourly Precipitation: - Heat Index: 76 °F Graphs

Location: Guardian Court, Arnold, MO

Updated: 3:30 AM CDT

Temperature: 77.2 °F Dew Point: 69 °F Humidity: 76% Wind: North at - Pressure: 29.78 in Hourly Precipitation: - Heat Index: 79 °F Graphs

Location: Arrowhead STL County, Saint Louis, MO

Updated: 3:22 AM CDT

Temperature: 76.3 °F Dew Point: 65 °F Humidity: 69% Wind: Calm Pressure: 29.90 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: Chesapeake on the Bluff, Columbia, IL

Updated: 3:22 AM CDT

Temperature: 76.1 °F Dew Point: 72 °F Humidity: 86% Wind: Calm Pressure: 29.24 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Arnold # 1, Arnold, MO

Updated: 3:18 AM CDT

Temperature: 77.7 °F Dew Point: 67 °F Humidity: 69% Wind: WSW at 1.6 mph Pressure: 29.83 in Hourly Precipitation: - Heat Index: 80 °F Graphs

Location: Rosewood Korner, Waterloo, IL

Updated: 3:27 AM CDT

Temperature: 76.6 °F Dew Point: 68 °F Humidity: 74% Wind: West at 4.7 mph Pressure: 29.78 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: 6735 Wynfield Terrace Dr., St. Louis, MO

Updated: 3:32 AM CDT

Temperature: 77.2 °F Dew Point: 62 °F Humidity: 60% Wind: South at 1.1 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Arnold, MO

Updated: 3:21 AM CDT

Temperature: 78.4 °F Dew Point: 72 °F Humidity: 80% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Arnold, Arnold, MO

Updated: 3:28 AM CDT

Temperature: 78.5 °F Dew Point: 69 °F Humidity: 73% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 3:32 AM CDT

Temperature: 77.2 °F Dew Point: 69 °F Humidity: 75% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Christopher Winds, Oakville, MO

Updated: 3:32 AM CDT

Temperature: 79.0 °F Dew Point: 69 °F Humidity: 72% Wind: Calm Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 3:32 AM CDT

Temperature: 74.7 °F Dew Point: 69 °F Humidity: 82% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Boardwalk Place, Saint Louis, MO

Updated: 3:32 AM CDT

Temperature: 78.6 °F Dew Point: 68 °F Humidity: 70% Wind: Calm Pressure: 29.64 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: Hardy Acres / AA9UC, Waterloo, IL

Updated: 3:32 AM CDT

Temperature: 76.3 °F Dew Point: 68 °F Humidity: 77% Wind: ESE at 1.1 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 3:32 AM CDT

Temperature: 76.7 °F Dew Point: 70 °F Humidity: 81% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 3:30 AM CDT

Temperature: 75.4 °F Dew Point: 71 °F Humidity: 87% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 3:32 AM CDT

Temperature: 77.4 °F Dew Point: 69 °F Humidity: 76% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 3:32 AM CDT

Temperature: 76.8 °F Dew Point: 71 °F Humidity: 83% Wind: SW at 4.5 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Cathedral Drive, Saint Louis, MO

Updated: 3:30 AM CDT

Temperature: 79.5 °F Dew Point: 72 °F Humidity: 76% Wind: North at - Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Brookton Oaks Drive, Cedar Hill, MO

Updated: 3:30 AM CDT

Temperature: 76.1 °F Dew Point: 70 °F Humidity: 81% Wind: North at - Pressure: 29.70 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: High Ridge Fire District House #1, High Ridge, MO

Updated: 3:23 AM CDT

Temperature: 78.5 °F Dew Point: 71 °F Humidity: 77% Wind: SW at 7.0 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Lakeview Ridge Drive, Fenton, MO

Updated: 3:30 AM CDT

Temperature: 79.0 °F Dew Point: 69 °F Humidity: 71% Wind: North at - Pressure: 29.86 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: Gedern Village, Columbia, IL

Updated: 3:32 AM CDT

Temperature: 77.2 °F Dew Point: 70 °F Humidity: 80% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: APRSWXNET, Waterloo, IL

Updated: 3:03 AM CDT

Temperature: 74 °F Dew Point: 70 °F Humidity: 88% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Deerpath Acres Court, Saint Louis, MO

Updated: 3:30 AM CDT

Temperature: 77.7 °F Dew Point: 70 °F Humidity: 77% Wind: North at - Pressure: 29.84 in Hourly Precipitation: - Heat Index: 80 °F Graphs

Location: Whipporwill Lane, Festus, MO

Updated: 3:32 AM CDT

Temperature: 73.2 °F Dew Point: 70 °F Humidity: 89% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: 71 °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 
324 am CDT Monday Aug 3 2015 


Short term: (through late this afternoon) 
issued at 316 am CDT Monday Aug 3 2015 


Surface front extends from northern Illinois through southern 
Iowa into far northwestern Missouri at this hour. This front will 
move south today and begin to realign itself under the 
northwesterlyupper flow aloft so that it will extend from 
central Missouri into southeast Missouri by later this afternoon. 
While there will not be any significant shortwave troughs moving 
through the area today to provide enhanced ascent along the 
front...there will be enough low level convergence along it to 
support going slight chances. MLCAPES by later this afternoon will 
be in the 2000-3000 j/kg range. 


Temperatures will still be warm ahead of the front in the southern 
County Warning Area where mixing will be above 850mb. Temperatures will still 
likely be in the lower to middle 90s along and south of I-70 ahead 
of the cold front where mixing will be above 850mb. 


Britt 


Long term: (tonight through sunday) 
issued at 316 am CDT Monday Aug 3 2015 


(tonight through wednesday) 


The surface front will move south of the area by Tuesday morning and 
remain south of the area through Wednesday. Rain chances will be 
greater tonight into Tuesday as both the NAM and GFS are showing an 
increase in low level moisture convergence overnight over northeast 
and east central Missouri overnight. By Tuesday and Wednesday...two 
significant shortwave troughs will move across Missouri and 
Illinois with a corresponding increase in low level moisture 
convergence. This justifies the going high chance or likely 
chances for thunderstorms. 


(Thursday through sunday) 


Wavy front will remain over the area at least through Friday 
keeping thunderstorm chances in the forecast. Heights will 
increase over the area by the weekend with 850mb temperatures near 
20c. This should cause temperatures to climb back above normal. 


Britt 


&& 


Aviation: (for the 06z tafs through 06z Monday night) 
issued at 1149 PM CDT sun Aug 2 2015 


I've included a short tempo group at the beginning of the taf 
period for kcou due to weakening cluster of storms tracking 
southeast towards the terminal. Otherwise I expect a dry night 
with VFR flight conditions. A cold front will move across the area 
on Monday. There will probably be isolated-scattered storms 
(20-30% probability) with the front in the afternoon. However 
given the low coverage and uncertainty with location and terminal 
impacts, I have opted to not mention any thunder in the tafs at 
this time. 


Specifics for kstl: 


VFR flight conditions are expected to dominate the taf period. A 
cold front will move across the area on Monday. There will 
probably be isolated-scattered storms (20-30% probability) with 
the front in the afternoon. However given the low coverage and 
uncertainty with location and terminal impacts, I have opted to 
not mention any thunder in the kstl taf at this time. 


Glass 


&& 


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


$$ 


Weather forecast office lsx 



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