Collinsville, Illinois Weather Conditions

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Current Conditions

  • 86°
  • Clear
  • Wind: WNW 4 mph
  • Humidity: 32%
  • Visibility: 10.0 miles
  • Dew Point: 53°
  • Pressure: 29.90 in. -
  • Heat Index: 84

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Next 12 Hours

4  pm
7  pm
10  pm
1  am
4  am
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
84°
75°
66°
63°
59°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 86 °
  • Low: 57 °
  • Partly Cloudy
  • Wednesday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 66 °
  • Chance of a Thunderstorm
  • Thursday
  • Thunderstorm
  • High: 88 °
  • Low: 55 °
  • T-Storms
  • Friday
  • Chance of Rain
  • High: 61 °
  • Low: 39 °
  • Chance of Rain
  • Saturday
  • Clear
  • High: 63 °
  • Low: 43 °
  • Clear

Forecast for Collinsville, Illinois

Updated: 4:00 PM CDT on September 30, 2014

  • Tuesday

    Partly cloudy. Fog early. High of 84F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 57F. Winds from the ESE at 5 to 10 mph.

  • Wednesday

    Partly cloudy. Fog early. High of 84F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain, then thunderstorms and rain showers after midnight. Low of 66F. Winds from the SSE at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Thursday

    Overcast with thunderstorms and rain showers. High of 88F. Winds from the South at 10 to 15 mph. Chance of rain 70% with rainfall amounts near 0.5 in. possible.

  • Thursday Night

    Partly cloudy with thunderstorms. Fog overnight. Low of 55F. Winds from the SSW at 10 to 15 mph. Chance of rain 80% with rainfall amounts near 1.1 in. possible.

  • Friday

    Mostly cloudy with a chance of rain in the morning, then clear. High of 61F. Breezy. Winds from the WNW at 15 to 20 mph. Chance of rain 20%.

  • Friday Night

    Clear in the evening, then partly cloudy. Low of 39F. Winds from the West at 5 to 15 mph.

  • Saturday

    Clear. High of 63F. Winds from the WNW at 10 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 43F. Winds less than 5 mph.

  • Sunday

    Clear. High of 75F. Winds from the SSW at 5 to 15 mph.

  • Sunday Night

    Partly cloudy. Low of 45F. Winds from the WNW at 5 to 15 mph.

  • Monday

    Partly cloudy. High of 75F. Winds from the NW at 10 to 15 mph.

  • Monday Night

    Partly cloudy. Low of 41F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm. High of 82F. Winds from the SSE at 10 to 15 mph. Chance of rain 20%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 52F. Winds from the SSW at 5 to 10 mph shifting to the West after midnight. Chance of rain 50%.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm. High of 88F. Winds less than 5 mph. Chance of rain 20%.

  • Wednesday Night

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

  • Thursday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 72F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 50F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Partly cloudy with a chance of a thunderstorm. High of 64F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Partly cloudy. Low of 43F. Winds less than 5 mph.

  • Saturday

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

  • Saturday Night

    Clear. Low of 43F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Collinsville West, Collinsville, IL

Updated: 2:51 PM CDT

Temperature: 86.7 °F Dew Point: 54 °F Humidity: 33% Wind: WSW at 1.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 2:51 PM CDT

Temperature: 83.7 °F Dew Point: 54 °F Humidity: 36% Wind: NNE at 2.5 mph Pressure: 29.26 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 2:51 PM CDT

Temperature: 87.6 °F Dew Point: 61 °F Humidity: 41% Wind: SE at 4.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Liberty Place, Troy, IL

Updated: 2:44 PM CDT

Temperature: 84.7 °F Dew Point: 58 °F Humidity: 41% Wind: SSE at 4.0 mph Pressure: 29.27 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: MesoWest I -55/64/70 @ Poplar St Bridge IL US ILDOT, Fairmont City, IL

Updated: 1:25 PM CDT

Temperature: 87 °F Dew Point: 59 °F Humidity: 39% Wind: SSE at 4 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Nolan Creek, OFallon, IL

Updated: 2:46 PM CDT

Temperature: 85.7 °F Dew Point: 60 °F Humidity: 42% Wind: North at 4.0 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

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

Updated: 2:51 PM CDT

Temperature: 87.4 °F Dew Point: 62 °F Humidity: 43% Wind: Calm Pressure: 29.65 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 2:51 PM CDT

Temperature: 88.4 °F Dew Point: 59 °F Humidity: 37% Wind: NNE at 1.0 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Old Skewl, Fairview Heights, IL

Updated: 2:51 PM CDT

Temperature: 80.3 °F Dew Point: 53 °F Humidity: 39% Wind: SE at 2.2 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: StormGrl2001, Fairview Heights, IL

Updated: 2:37 PM CDT

Temperature: 83.5 °F Dew Point: 61 °F Humidity: 47% Wind: Calm Pressure: 29.80 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 2:51 PM CDT

Temperature: 89.9 °F Dew Point: 59 °F Humidity: 35% Wind: NE at 2.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Mallard Pointe, Troy, IL

Updated: 2:51 PM CDT

Temperature: 89.1 °F Dew Point: 61 °F Humidity: 39% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 2:48 PM CDT

Temperature: 88.0 °F Dew Point: 63 °F Humidity: 43% Wind: NW at 1.1 mph Pressure: 29.85 in Hourly Precipitation: - Heat Index: 89 °F Graphs

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

Updated: 1:00 PM CDT

Temperature: 86 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 2:50 PM CDT

Temperature: 81.8 °F Dew Point: 60 °F Humidity: 47% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

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

Updated: 2:50 PM CDT

Temperature: 84.6 °F Dew Point: 60 °F Humidity: 43% Wind: ENE at 4.5 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: North Horner Park, Lebanon, IL

Updated: 2:50 PM CDT

Temperature: 83.0 °F Dew Point: 71 °F Humidity: 68% Wind: WNW at 4.0 mph Pressure: 29.44 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: West End, Belleville, IL

Updated: 2:50 PM CDT

Temperature: 88.7 °F Dew Point: 32 °F Humidity: 31% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: APRSWXNET Shiloh IL US, Belleville, IL

Updated: 2:03 PM CDT

Temperature: 84 °F Dew Point: 57 °F Humidity: 40% Wind: SSE at 4 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Branch Street, St. Louis, MO

Updated: 2:51 PM CDT

Temperature: 84.0 °F Dew Point: - Humidity: 39% Wind: North at - Pressure: 29.46 in Hourly Precipitation: - Heat Index: 83 °F Graphs

Location: BLAIR STREET, St. Louis, MO

Updated: 2:50 PM CDT

Temperature: 85.3 °F Dew Point: - Humidity: 43% Wind: North at - Pressure: 29.39 in Hourly Precipitation: - Heat Index: 85 °F Graphs

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

Updated: 2:51 PM CDT

Temperature: 82.8 °F Dew Point: 64 °F Humidity: 53% Wind: East at 1.6 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Belleville, IL, Belleville, IL

Updated: 2:51 PM CDT

Temperature: 87.6 °F Dew Point: 40 °F Humidity: 19% Wind: Calm Pressure: 29.62 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 2:51 PM CDT

Temperature: 80.7 °F Dew Point: 61 °F Humidity: 52% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Millstadt, Millstadt, IL

Updated: 2:51 PM CDT

Temperature: 93.2 °F Dew Point: 72 °F Humidity: 51% Wind: NNE at 3.5 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

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

Updated: 2:43 PM CDT

Temperature: 86.4 °F Dew Point: 58 °F Humidity: 38% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Hunters Creek, Mascoutah, IL

Updated: 2:51 PM CDT

Temperature: 85.9 °F Dew Point: 54 °F Humidity: 33% Wind: SSW at 2.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 2:46 PM CDT

Temperature: 84.1 °F Dew Point: 62 °F Humidity: 48% Wind: SSE at 2.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: MesoWest GARD IL US UPR, Hamel, IL

Updated: 12:00 PM CDT

Temperature: 80 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Forest Park, St. Louis, MO

Updated: 2:40 PM CDT

Temperature: 84.9 °F Dew Point: - Humidity: 38% Wind: North at - Pressure: 29.34 in Hourly Precipitation: 0.00 in Heat Index: 84 °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 
1256 PM CDT Tue Sep 30 2014 


Update: 
issued at 1117 am CDT Tue Sep 30 2014 


Low clouds have finally halted their progression to the southwest 
and are beginning to dissipate over central Illinois. The 12z kilx 
sounding showed a rather shallow frontal inversion, so would 
expect remaining clouds to dissipate through the early afternoon 
hours allowing for some sun in the north and northeastern counties 
today. Still, this should take some toll on the temperatures so 
have lowered highs in these areas today. Elsewhere, latest 
aircraft soundings from kstl showed mixing up to 800mb which supports 
going forecast highs in the mid 80s over the central and southern 
parts of the County Warning Area. 


Britt 


&& 


Short term: (through late this afternoon) 
issued at 224 am CDT Tue Sep 30 2014 


Focus continues to be temps with one more dry day expected. 


Cdfnt shows up well on regional radar and currently pushing into nrn 
MO and central Illinois. Mdls are in fairly good agreement with this fnt 
slowly sinking swd today, eventually reaching along a line from irk 
to near stl to slo before stalling. Have made only minor changes to 
the prev forecast, trending twd persistence along and S of the fnt. 
Area of St across ern Iowa and nrn Illinois continuing to move swd presents 
a forecast problem for today. The rap/hrrr seem to have the best 
handle on these clouds currently. However, even these mdls suggest 
these clouds will dissipate by noon today. Therefore, north of the fnt, 
have trended near the warmer guidance. 


Long term: (wednesday through monday) 
issued at 306 am CDT Tue Sep 30 2014 


Focus quickly turns to precip chances thru the end of the work 
week. 


Mdls are in very good agreement regarding mass fields thru the 
week. Not much change from the prev forecast as there is not much 
change to latest mdls from what the day shift had to work with. 
It appears the NAM and local WRF have caught up with the other mdl 
guidance regarding cdfnt timing later this week. However, the 
GFS/ECMWF/Gem have slowed timing of fropa compared to prev cycles. 


Have therefore raised temps slightly for sern portions of the County Warning Area 
on thurs. Have also raised pops for thurs night to account for the 
slower fropa timing. 


Otherwise, much cooler temps advecting into the region for the 
weekend and into next week behind the fnt. 


&& 


Aviation: (for the 18z tafs through 18z Wednesday afternoon) 
issued at 1255 PM CDT Tue Sep 30 2014 


Clouds are dissipating rapidly over central Illinois and will soon 
exit at KUIN. Expect mainly dry and VFR conditions through the taf 
period. Only exception may be at ksus where river fog may develop 
late tonight in close proximity to the terminal. 


Specifics for kstl: expect dry and VFR conditions the next 30 
hours. 


Britt 


&& 


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


$$ 


Weather forecast office lsx 



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