Collinsville, Illinois Weather Conditions

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Current Conditions

  • 68°
  • Clear
  • Wind: SSE 8 mph
  • Humidity: 50%
  • Visibility: 10.0 miles
  • Dew Point: 49°
  • Pressure: 30.33 in. +

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Next 12 Hours

10  am
1  pm
4  pm
7  pm
10  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
61°
72°
73°
68°
59°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 73 °
  • Low: 48 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 77 °
  • Low: 54 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 79 °
  • Low: 54 °
  • Partly Cloudy
  • Friday
  • Clear
  • High: 79 °
  • Low: 55 °
  • Clear
  • Saturday
  • Mostly Cloudy
  • High: 81 °
  • Low: 59 °
  • Mostly Cloudy

Forecast for Collinsville, Illinois

Updated: 10:00 AM CDT on September 23, 2014

  • Tuesday

    Partly cloudy. Fog early. High of 73F. Winds from the ESE at 5 to 10 mph.

  • Tuesday Night

    Clear. Low of 48F. Winds less than 5 mph.

  • Wednesday

    Partly cloudy in the morning, then clear. High of 77F. Winds less than 5 mph.

  • Wednesday Night

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

  • Thursday

    Mostly cloudy in the morning, then clear. High of 79F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 54F. Winds from the SSE at 5 to 10 mph.

  • Friday

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

  • Friday Night

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

  • Saturday

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

  • Saturday Night

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

  • Sunday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 20%.

  • Sunday Night

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

  • Monday

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

  • Monday Night

    Partly cloudy. Low of 61F. Winds less than 5 mph.

  • Tuesday

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

  • Tuesday Night

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

  • Wednesday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Thursday

    Mostly cloudy with a chance of a thunderstorm. High of 77F. Winds less than 5 mph. Chance of rain 50%.

  • Thursday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 59F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Friday

    Mostly cloudy with a chance of rain. High of 72F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

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

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Collinsville West, Collinsville, IL

Updated: 11:21 AM CDT

Temperature: 67.8 °F Dew Point: 50 °F Humidity: 52% Wind: SSE at 5.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 11:21 AM CDT

Temperature: 68.0 °F Dew Point: 46 °F Humidity: 45% Wind: SE at 1.1 mph Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 11:21 AM CDT

Temperature: 70.1 °F Dew Point: 54 °F Humidity: 57% Wind: East at 6.0 mph Pressure: 30.25 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Liberty Place, Troy, IL

Updated: 11:14 AM CDT

Temperature: 67.6 °F Dew Point: 53 °F Humidity: 59% Wind: ESE at 3.0 mph Pressure: 29.70 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Nolan Creek, OFallon, IL

Updated: 11:12 AM CDT

Temperature: 68.2 °F Dew Point: 53 °F Humidity: 59% Wind: SE at 5.0 mph Pressure: 30.33 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 11:21 AM CDT

Temperature: 68.7 °F Dew Point: 53 °F Humidity: 58% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: New Goose, Fairview Heights, IL

Updated: 11:21 AM CDT

Temperature: 70.6 °F Dew Point: 52 °F Humidity: 52% Wind: SE at 3.0 mph Pressure: 30.33 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Old Skewl, Fairview Heights, IL

Updated: 11:21 AM CDT

Temperature: 64.5 °F Dew Point: 48 °F Humidity: 56% Wind: ESE at 2.2 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: StormGrl2001, Fairview Heights, IL

Updated: 11:19 AM CDT

Temperature: 70.3 °F Dew Point: 51 °F Humidity: 51% Wind: ESE at 2.7 mph Pressure: 30.28 in Hourly Precipitation: - Heat Index: 77 °F Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 11:21 AM CDT

Temperature: 73.6 °F Dew Point: 50 °F Humidity: 44% Wind: South at 3.0 mph Pressure: 30.30 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Mallard Pointe, Troy, IL

Updated: 11:21 AM CDT

Temperature: 72.0 °F Dew Point: 52 °F Humidity: 50% Wind: SSE at 4.5 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 11:10 AM CDT

Temperature: 68.0 °F Dew Point: 51 °F Humidity: 55% Wind: NE at 3.7 mph Pressure: 30.30 in Hourly Precipitation: - Heat Index: - Graphs

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

Updated: 9:50 AM CDT

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

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 11:06 AM CDT

Temperature: 72.6 °F Dew Point: 71 °F Humidity: 94% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 11:20 AM CDT

Temperature: 66.1 °F Dew Point: 54 °F Humidity: 64% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 11:21 AM CDT

Temperature: 68.0 °F Dew Point: 50 °F Humidity: 52% Wind: SSW at 2.9 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: North Horner Park, Lebanon, IL

Updated: 11:21 AM CDT

Temperature: 69.0 °F Dew Point: 57 °F Humidity: 66% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: West End, Belleville, IL

Updated: 11:21 AM CDT

Temperature: 72.9 °F Dew Point: 32 °F Humidity: 40% Wind: Calm Pressure: 30.33 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: APRSWXNET Shiloh IL US, Belleville, IL

Updated: 10:03 AM CDT

Temperature: 63 °F Dew Point: 52 °F Humidity: 67% Wind: ESE at 4 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Branch Street, St. Louis, MO

Updated: 11:20 AM CDT

Temperature: 67.3 °F Dew Point: - Humidity: 52% Wind: North at - Pressure: 29.88 in Hourly Precipitation: - Heat Index: - Graphs

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

Updated: 11:21 AM CDT

Temperature: 69.4 °F Dew Point: 53 °F Humidity: 56% Wind: Calm Pressure: 30.42 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Belleville, IL, Belleville, IL

Updated: 11:21 AM CDT

Temperature: 70.3 °F Dew Point: 40 °F Humidity: 33% Wind: Calm Pressure: 30.21 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Rosewood Heights, East Alton, IL

Updated: 11:21 AM CDT

Temperature: 68.9 °F Dew Point: 48 °F Humidity: 48% Wind: Calm Pressure: 30.27 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Millstadt, Millstadt, IL

Updated: 11:21 AM CDT

Temperature: 73.2 °F Dew Point: 57 °F Humidity: 56% Wind: SE at 5.8 mph Pressure: 30.28 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

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

Updated: 11:20 AM CDT

Temperature: 67.5 °F Dew Point: 51 °F Humidity: 55% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hunters Creek, Mascoutah, IL

Updated: 11:21 AM CDT

Temperature: 67.0 °F Dew Point: 50 °F Humidity: 55% Wind: SE at 8.0 mph Pressure: 30.30 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Milton Area - Oscar, Alton, IL

Updated: 11:12 AM CDT

Temperature: 67.8 °F Dew Point: 51 °F Humidity: 56% Wind: East at 3.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest GARD IL US UPR, Hamel, IL

Updated: 9:00 AM CDT

Temperature: 58 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hamel, IL 55/140, Worden, IL

Updated: 11:21 AM CDT

Temperature: 72.3 °F Dew Point: 52 °F Humidity: 48% Wind: SE at 7.8 mph Pressure: 28.85 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Forest Park, St. Louis, MO

Updated: 11:20 AM CDT

Temperature: 68.0 °F Dew Point: - Humidity: 52% Wind: North at - Pressure: 29.75 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...updated aviation 
National Weather Service St Louis MO 
657 am CDT Tue Sep 23 2014 


Short term: (through late this afternoon) 
issued at 418 am CDT Tue Sep 23 2014 


A large sfc ridge continues to dominate the ern part of the Continental U.S. 
With the center of the high near PA. The high is not expected to 
move much today. The ridge axis extends west-southwest thru the County Warning Area which will 
maintain the lght east/southeast flow. With the overall synoptic setup not 
changed much from yesterday...expect almost a Carbon copy for today 
with mostly clear skies and highs in the low/mid 70s. 


Miller 


Long term: (tonight through monday) 
issued at 418 am CDT Tue Sep 23 2014 


Upper level low now over the northern rockies and plains will move 
slowly eastward tonight with at least weak convection ahead of it 
across northwest MO. It appears that the showers/storms will remain 
north and west of our forecast area due to persistent surface ridge 
extending from the northeast US southwest into eastern and southern 
portions of MO. The coolest low temperatures tonight will be across 
southeast MO and southwest Illinois near the surface ridge axis where the 
wind will be calm and there will only be some high level clouds. 
The upper level low will eventually retrograde southwestward into 
the Central Plains Thursday and Thursday night. There will be a 
very gradual warming trend as the 850 mb temperatures begin to 
slowly creep up over our area. The European model (ecmwf) model tries to bring 
precipitation into our area Sunday night and Monday as low level 
moisture finally streams northward into the region ahead of an 
upper level low and associated surface low over eastern OK and Arkansas. 
The GFS model also tries to bring some moisture northward into our 
area, but is further north-northeast with the upper low and it does 
not have any surface reflection, and also much less qpf in and near 
our forecast area. 


Gks 


&& 


Aviation: (for the 12z tafs through 12z Wednesday morning) 
issued at 644 am CDT Tue Sep 23 2014 


Area of high pressure will dominate thru the prd providing mostly 
clear skies and a lght east/southeast flow. Steam fog dvlpd overnight in the 
river valleys which should burn off by 13z. Would expect more 
steam fog tonight but maybe not as thick as lows should be just a 
touch warmer. 


Specifics for kstl: 


VFR fcst with high pressure in control...mostly clear skies and 
light east/southeast winds. 


2% 


&& 


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


$$ 


Weather forecast office lsx 



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