Collinsville, Illinois Weather Conditions

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Current Conditions

  • 59°
  • Clear
  • Wind: North 6 mph
  • Humidity: 81%
  • Visibility: 10.0 miles
  • Dew Point: 53°
  • Pressure: 30.09 in. +

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Next 12 Hours

7  am
10  am
1  pm
4  pm
7  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
59°
72°
79°
79°
77°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Clear
  • High: 81 °
  • Low: 59 °
  • Clear
  • Friday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 70 °
  • Chance of a Thunderstorm
  • Saturday
  • Chance of a Thunderstorm
  • High: 93 °
  • Low: 72 °
  • Chance of T-Storms
  • Sunday
  • Chance of a Thunderstorm
  • High: 91 °
  • Low: 63 °
  • Chance of T-Storms
  • Monday
  • Partly Cloudy
  • High: 79 °
  • Low: 55 °
  • Partly Cloudy

Forecast for Collinsville, Illinois

Updated: 4:00 AM CDT on July 24, 2014

  • Thursday

    Clear. High of 81F. Winds from the NNE at 5 to 10 mph.

  • Thursday Night

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

  • Friday

    Mostly cloudy in the morning, then clear. High of 84F. Winds from the SSE at 5 to 15 mph. Chance of rain 20%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds from the South at 5 to 15 mph. Chance of rain 30%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 93F with a heat index of 102F. Winds from the SW at 5 to 10 mph. Chance of rain 30%.

  • Saturday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 72F. Winds from the SW at 5 to 10 mph.

  • Sunday

    Mostly cloudy with a chance of a thunderstorm and rain in the morning, then clear. High of 91F. Winds from the WNW at 10 to 15 mph. Chance of rain 50%.

  • Sunday Night

    Clear. Low of 63F. Winds from the NNW at 5 to 10 mph.

  • Monday

    Partly cloudy. High of 79F. Winds from the NNW at 5 to 10 mph.

  • Monday Night

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

  • Tuesday

    Partly cloudy. High of 81F. Winds less than 5 mph.

  • Tuesday Night

    Mostly cloudy. Low of 54F. Winds less than 5 mph.

  • Wednesday

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

  • Wednesday Night

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

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 54F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Clear with a chance of a thunderstorm. High of 79F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Clear. Low of 54F. Winds less than 5 mph.

  • Saturday

    Clear. High of 79F. Winds less than 5 mph.

  • Saturday Night

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

  • Sunday

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

  • Sunday Night

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

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Collinsville West, Collinsville, IL

Updated: 5:40 AM CDT

Temperature: 59.0 °F Dew Point: 52 °F Humidity: 78% Wind: ENE at 1.0 mph Pressure: 30.12 in Hourly Precipitation: 0.00 in Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 5:40 AM CDT

Temperature: 61.3 °F Dew Point: 50 °F Humidity: 65% Wind: NE at 1.1 mph Pressure: 29.44 in Hourly Precipitation: 0.00 in Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 5:40 AM CDT

Temperature: 59.0 °F Dew Point: 53 °F Humidity: 80% Wind: NE at 1.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Liberty Place, Troy, IL

Updated: 5:36 AM CDT

Temperature: 56.6 °F Dew Point: 53 °F Humidity: 86% Wind: Calm Pressure: 29.48 in Hourly Precipitation: 0.00 in Graphs

Location: Nolan Creek, OFallon, IL

Updated: 5:30 AM CDT

Temperature: 58.0 °F Dew Point: 53 °F Humidity: 83% Wind: NNW at 2.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Don's Backyard, O'Fallon, IL

Updated: 5:40 AM CDT

Temperature: 56.1 °F Dew Point: 56 °F Humidity: 100% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Graphs

Location: New Goose, Fairview Heights, IL

Updated: 5:40 AM CDT

Temperature: 59.7 °F Dew Point: 53 °F Humidity: 79% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Old Skewl, Fairview Heights, IL

Updated: 5:40 AM CDT

Temperature: 60.7 °F Dew Point: 49 °F Humidity: 66% Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 5:40 AM CDT

Temperature: 58.0 °F Dew Point: 52 °F Humidity: 81% Wind: NNW at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: Mallard Pointe, Troy, IL

Updated: 1:47 AM CDT

Temperature: 61.7 °F Dew Point: 58 °F Humidity: 88% Wind: Calm Pressure: 30.20 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest NAMOK1 IL US UPR, Granite City, IL

Updated: 4:05 AM CDT

Temperature: 63 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 5:40 AM CDT

Temperature: 56.8 °F Dew Point: 54 °F Humidity: 90% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 5:34 AM CDT

Temperature: 57.3 °F Dew Point: 54 °F Humidity: 88% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Grand Ave, Edwardsville, IL

Updated: 5:39 AM CDT

Temperature: 55.9 °F Dew Point: 55 °F Humidity: 96% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 5:40 AM CDT

Temperature: 56.3 °F Dew Point: 54 °F Humidity: 93% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Greg and Linsay's House, Swansea, IL

Updated: 5:26 AM CDT

Temperature: 60.6 °F Dew Point: 54 °F Humidity: 80% Wind: NE at 4.5 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Graphs

Location: North Horner Park, Lebanon, IL

Updated: 5:40 AM CDT

Temperature: 56.0 °F Dew Point: 44 °F Humidity: 63% Wind: Calm Pressure: 29.47 in Hourly Precipitation: 0.00 in Graphs

Location: West End, Belleville, IL

Updated: 5:40 AM CDT

Temperature: 61.0 °F Dew Point: 36 °F Humidity: 58% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: APRSWXNET Shiloh IL US, Belleville, IL

Updated: 5:03 AM CDT

Temperature: 60 °F Dew Point: 53 °F Humidity: 77% Wind: North at 2 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: St. Jacob, Il, St. Jacob, IL

Updated: 5:39 AM CDT

Temperature: 57.0 °F Dew Point: 54 °F Humidity: 90% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Graphs

Location: Belleville, IL, Belleville, IL

Updated: 5:40 AM CDT

Temperature: 60.4 °F Dew Point: 45 °F Humidity: 56% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 5:40 AM CDT

Temperature: 57.8 °F Dew Point: 52 °F Humidity: 82% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: APRSWXNET East Alton IL US, Wood River, IL

Updated: 4:48 AM CDT

Temperature: 58 °F Dew Point: 53 °F Humidity: 82% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Graphs

Location: Millstadt, Millstadt, IL

Updated: 5:40 AM CDT

Temperature: 55.6 °F Dew Point: 47 °F Humidity: 74% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Shaw/Tower Grove, St. Louis, MO

Updated: 5:32 AM CDT

Temperature: 63.5 °F Dew Point: 50 °F Humidity: 61% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: Hunters Creek, Mascoutah, IL

Updated: 5:39 AM CDT

Temperature: 57.8 °F Dew Point: 53 °F Humidity: 83% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 5:37 AM CDT

Temperature: 57.9 °F Dew Point: 54 °F Humidity: 87% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest GARD IL US UPR, Hamel, IL

Updated: 4:40 AM CDT

Temperature: 57 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service St Louis MO 
337 am CDT Thu Jul 24 2014 


Short term: (through late this afternoon) 
issued at 333 am CDT Thu Jul 24 2014 


Surface ridge will remain overhead today with mostly sunny skies, 
lower dewpts and cooler temperatures. Highs will only be in the 
upper 70s to low 80s. 


Byrd 


Long term: (tonight through wednesday) 
issued at 333 am CDT Thu Jul 24 2014 


By tonight, surface ridge begins to move off to the east allowing 
southerly winds and low level moisture to return once again. Models 
continue to develop a complex over Iowa on nose of low level jet 
with southern edge just skimming far northern portions of forecast 
area after 06z Friday. Kept slight chance pops there for now. 
Otherwise, dry conditions to prevail with lows in the upper 50s to 
low 60s. 


On Friday, complex to slide southeast across Illinois with northeastern 
portions of forecast area on periphery of complex. Depending on 
coverage of activity and cloud cover associated with it, 
temperatures are hard to pin down. For now have highs ranging from 
the low 80s far east to the low 90s over central MO. 


By Friday night, main cold front to begin sliding southeast through 
forecast area. With increasing low level jet once again and 
increasing moisture, will see activity fire on nose of low level 
jet along and east of Mississippi River. Will also see milder overnight 
temperatures with lows only in the upper 60s to mid 70s. 


Despite 850 temps between 22 and 24c, high temperature forecast will 
be tricky on Saturday. With ongoing storms possible along frontal 
boundary that will be moving through, could see a wide range of high 
temperatures. For now kept forecast area rather warm with highs in 
the low to mid 90s, and with dewpts in the low 70s, heat indicies 
will approach 100 in many locations. Another issue will be the 
possibility of severe weather especially Saturday afternoon and 
Saturday night. High CAPES, plenty of low level moisture, and 
shortwave tracking along boundary, could see complex develop and 
slide east. Storm Prediction Center has put most of forecast area in a slight risk for 
day 3. 


Frontal boundary and storms to finally exit region by late Sunday 
with surface ridge building in for the first part of the work week. 
Highs Monday through Wednesday will be in the upper 70s to low 80s. 


Byrd 
&& 


Aviation: (for the 06z tafs through 06z Thursday night) 
issued at 1132 PM CDT Wed Jul 23 2014 


VFR fcst thru the prd as high pressure drifts from Minnesota to in allowing 
for diurnal cu and a light breeze with an Erly component. 


2% 


&& 


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


$$ 
Weather forecast office lsx 










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