Arnold, Missouri Weather Conditions

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Current Conditions

  • 65°
  • Clear
  • Wind: Calm
  • Humidity: 93%
  • Visibility: 5.0 miles
  • Dew Point: 63°
  • Pressure: 30.06 in. 0

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
66°
66°
84°
90°
93°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 93 °
  • Low: 70 °
  • Partly Cloudy
  • Wednesday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 55 °
  • Chance of T-Storms
  • Thursday
  • Clear
  • High: 82 °
  • Low: 59 °
  • Clear
  • Friday
  • Partly Cloudy
  • High: 84 °
  • Low: 70 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 86 °
  • Low: 64 °
  • Partly Cloudy

Forecast for Arnold, Missouri

Updated: 4:00 AM CDT on July 22, 2014

  • Tuesday

    Clear in the morning, then partly cloudy. High of 93F. Winds from the South at 5 to 15 mph.

  • Tuesday Night

    Overcast with a chance of a thunderstorm and a chance of rain after midnight. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 50%.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the West at 5 to 15 mph shifting to the NNW in the afternoon. Chance of rain 50%.

  • Wednesday Night

    Partly cloudy in the evening, then clear. Low of 55F. Winds from the NNE at 5 to 15 mph.

  • Thursday

    Clear. High of 82F. Winds from the NNE at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 59F. Winds from the East at 5 to 10 mph.

  • Friday

    Clear in the morning, then partly cloudy. High of 84F. Winds from the SE at 5 to 10 mph.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm and rain after midnight. Low of 70F. Winds from the SSE at 10 to 15 mph. Chance of rain 30%.

  • Saturday

    Partly cloudy. High of 86F with a heat index of 91F. Winds from the SW at 10 to 15 mph shifting to the WNW in the afternoon.

  • Saturday Night

    Clear with a chance of a thunderstorm. Low of 64F. Winds from the North at 5 to 10 mph. Chance of rain 20%.

  • Sunday

    Partly cloudy with a chance of a thunderstorm. High of 90F. Winds from the SSW at 5 to 10 mph. Chance of rain 50%.

  • Sunday Night

    Clear with a chance of a thunderstorm. Low of 64F. Winds from the NW at 5 to 10 mph. Chance of rain 40%.

  • Monday

    Partly cloudy. High of 84F. Winds from the NW at 10 to 15 mph.

  • Monday Night

    Clear. Low of 55F. Winds from the North at 5 to 10 mph.

  • Tuesday

    Clear. High of 81F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Fog overnight. Low of 55F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 81F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 63F. Winds less than 5 mph.

  • Thursday

    Clear. High of 81F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 63F. Winds less than 5 mph.

  • Friday

    Clear. High of 82F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 63F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Arnold, MO

Updated: 4:03 AM CDT

Temperature: 66.4 °F Dew Point: 66 °F Humidity: 97% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Arnold, Arnold, MO

Updated: 4:03 AM CDT

Temperature: 67.1 °F Dew Point: 66 °F Humidity: 95% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: summerfield, Imperial, MO

Updated: 4:16 AM CDT

Temperature: 64.2 °F Dew Point: 63 °F Humidity: 97% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Wynfield Terrace, St. Louis, MO

Updated: 4:16 AM CDT

Temperature: 68.4 °F Dew Point: 64 °F Humidity: 86% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Saint Louis County, Saint Louis County, MO

Updated: 4:16 AM CDT

Temperature: 67.1 °F Dew Point: 66 °F Humidity: 95% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Imperial, MO

Updated: 4:16 AM CDT

Temperature: 67.1 °F Dew Point: 62 °F Humidity: 83% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakville, Providence Pointe, Oakville, MO

Updated: 4:16 AM CDT

Temperature: 67.6 °F Dew Point: 66 °F Humidity: 93% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Imperial - Wellington Subdivision, Imperial, MO

Updated: 4:16 AM CDT

Temperature: 67.4 °F Dew Point: 66 °F Humidity: 95% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest HLCRST MO US UPR, Saint Louis, MO

Updated: 3:00 AM CDT

Temperature: 76 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Oakville, Cliffwood Trail, Oakville, MO

Updated: 4:16 AM CDT

Temperature: 67.8 °F Dew Point: 66 °F Humidity: 93% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakville, Cardinal Creek Subd, Oakville, MO

Updated: 4:16 AM CDT

Temperature: 67.1 °F Dew Point: 66 °F Humidity: 96% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Christopher Winds, Oakville, MO

Updated: 4:15 AM CDT

Temperature: 69.4 °F Dew Point: 66 °F Humidity: 90% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Rock Creek Terrace, High Ridge, MO

Updated: 4:16 AM CDT

Temperature: 70.1 °F Dew Point: 65 °F Humidity: 85% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: San Luis Trails, Fenton, MO

Updated: 4:16 AM CDT

Temperature: 71.3 °F Dew Point: 64 °F Humidity: 78% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: MesoWest WARNK1 IL US UPR, Columbia, IL

Updated: 3:00 AM CDT

Temperature: 69 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hawkins/Smizer Mill, Fenton, MO

Updated: 4:16 AM CDT

Temperature: 67.9 °F Dew Point: 64 °F Humidity: 89% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Sunset Hills, St Louis, MO

Updated: 4:06 AM CDT

Temperature: 70.5 °F Dew Point: 67 °F Humidity: 87% Wind: Calm Pressure: 30.03 in Hourly Precipitation: - Heat Index: - Graphs

Location: Crestwood, Crestwood, MO

Updated: 4:08 AM CDT

Temperature: 67.3 °F Dew Point: 63 °F Humidity: 87% Wind: Calm Pressure: 29.78 in Hourly Precipitation: - Heat Index: - Graphs

Location: South County, Affton, MO

Updated: 4:16 AM CDT

Temperature: 69.1 °F Dew Point: 66 °F Humidity: 89% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Olde Mill Estates, Byrnes Mill, MO

Updated: 4:16 AM CDT

Temperature: 67.8 °F Dew Point: 67 °F Humidity: 97% Wind: South at 1.6 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Big Bend and I-270, Kirkwood, MO

Updated: 4:15 AM CDT

Temperature: 70.9 °F Dew Point: 63 °F Humidity: 76% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Gedern Village, Columbia, IL

Updated: 4:15 AM CDT

Temperature: 65.5 °F Dew Point: 64 °F Humidity: 96% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Crest Ave. Kirkwood MO, St. Louis, MO

Updated: 4:16 AM CDT

Temperature: 69.4 °F Dew Point: 65 °F Humidity: 86% Wind: Calm Pressure: 30.03 in Hourly Precipitation: - Heat Index: - Graphs

Location: East Madison, Kirkwood, MO, Kirkwood, MO

Updated: 4:16 AM CDT

Temperature: 69.3 °F Dew Point: 66 °F Humidity: 88% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: On The Bluffs, Waterloo, IL

Updated: 4:16 AM CDT

Temperature: 63.9 °F Dew Point: 63 °F Humidity: 96% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Sandy Creek Winery, Pevely, MO

Updated: 4:12 AM CDT

Temperature: 63.1 °F Dew Point: 63 °F Humidity: 98% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Essex and Geyer, St. Louis, MO

Updated: 4:04 AM CDT

Temperature: 67.3 °F Dew Point: 62 °F Humidity: 84% Wind: Calm Pressure: 29.87 in Hourly Precipitation: - Heat Index: - Graphs

Location: Twin Oaks, Twin Oaks, MO

Updated: 4:07 AM CDT

Temperature: 69.6 °F Dew Point: 66 °F Humidity: 88% Wind: Calm Pressure: 29.94 in Hourly Precipitation: - Heat Index: - Graphs

Location: Manchester, MO, Manchester, MO

Updated: 4:13 AM CDT

Temperature: 67.9 °F Dew Point: 66 °F Humidity: 92% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Arbor Valley, Ballwin, MO

Updated: 1:08 AM CDT

Temperature: 69.7 °F Dew Point: 66 °F Humidity: 89% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
349 am CDT Tue Jul 22 2014 


Short term: (through late this afternoon) 
issued at 348 am CDT Tue Jul 22 2014 


During the day today the upper ridge will remain in place with 
surface temperatures expected to warm up into the low to mid 90s. 
Low level moisture continues to increase as well, so will see heat 
indicies between 100 and 105 for central and northeast MO as well as 
west central Illinois. 


Byrd 


Long term: (tonight through monday) 
issued at 348 am CDT Tue Jul 22 2014 


In the meantime, cold front associated with next weather system 
to move into far northern portions of MO by 00z Wednesday. Short 
term models begin to develop complex along frontal boundary around 
this time and track it to the south and southeast through forecast 
area tonight. Some differences on timing and coverage between the 
models, so went with a blend and increased pops to likely late 
this evening and into the overnight hours as it moves through. 
Despite all of the instability and moisture, some concern about 
mid level capping, but confident cap will weaken sufficiently to 
allow storm development. With decent CAPES, moisture and 
instability, Storm Prediction Center has placed northern portions of forecast area in 
a slight risk for tonight with main threats being large hail and 
damaging winds. 


System to continue tracking south through southern portions of 
forecast area Wednesday morning, before tapering off Wednesday 
afternoon. As for highs on Wednesday, will range from the low 80s 
far north to around 90 far south. 


By Wednesday night, surface ridge begins to build in and bring in 
drier and cooler weather for the last half of the work week. Highs 
on Thursday will be in the upper 70s to mid 80s. 


Surface ridge to move off to the east by Friday with a warm front 
developing across region with elevated convection possible for 
portions of forecast area Friday and Friday night. Then as main cold 
front moves into region on Saturday, will see additional rounds of 
storms through Sunday night before system exits region on Monday. 
Temperatures to moderate through the weekend once again. 


Byrd 
&& 


Aviation: (for the 06z tafs through 06z Tuesday night) 
issued at 1144 PM CDT Mon Jul 21 2014 


VFR with sly to swly winds aob 10kts is expected thru tues 
afternoon. Sus may see some fog a couple of hours before sunrise 
tues morning, however, confidence in this event is decreasing due 
to greater dewpoint spread and ssely flow. There is some 
indication that thunderstorms and rain may form during the pre-dawn hours tues 
morning across the srn half of Iowa. If these thunderstorms and rain do form, believe 
they will remain north of uin, but this remains uncertain. A cdfnt is 
expected to approach the region tues evening. This fnt may bring 
isod to sct thunderstorms and rain along and just ahead of the fnt with winds 
becoming nly behind the fnt. Due to less and somewhat uncertain 
coverage of tsra, have only added thunderstorms in the vicinity for now. 


Specifics for kstl: VFR and dry thru the taf period with sly to 
swly winds ahead of an approaching cdfnt. This fnt is expected to 
push thru the terminal late tues night. This fnt may be 
accompanied by thunderstorms and rain. However, there is too much uncertainty 
regarding coverage and occurrence and have kept out of taf for now. 


Tilly 
&& 


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


$$ 
Weather forecast office lsx 










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