Collinsville, Illinois Weather Conditions

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Current Conditions

  • 74°
  • Mostly Cloudy
  • Wind: SSE 7 mph
  • Humidity: 82%
  • Visibility: 10.0 miles
  • Dew Point: 68°
  • Pressure: 30.01 in. 0

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Next 12 Hours

11  pm
2  am
5  am
8  am
11  am
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
70°
69°
68°
71°
79°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Chance of a Thunderstorm
  • High: 87 °
  • Low: 66 °
  • Chance of T-Storms
  • Monday
  • Partly Cloudy
  • High: 91 °
  • Low: 68 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 92 °
  • Low: 68 °
  • Partly Cloudy
  • Wednesday
  • Clear
  • High: 93 °
  • Low: 69 °
  • Clear
  • Thursday
  • Clear
  • High: 94 °
  • Low: 70 °
  • Clear

Forecast for Collinsville, Illinois

Updated: 7:01 PM CDT on January 29, 2015

  • Saturday

    Partly cloudy. Lows overnight in the mid 60s.

  • Saturday Night

    Partly cloudy this evening with more clouds for overnight. A stray shower or thunderstorm is possible. Low 66F. Winds light and variable.

  • Sunday

    Partly cloudy in the morning followed by scattered thunderstorms in the afternoon. High 87F. Winds SSW at 5 to 10 mph. Chance of rain 40%.

  • Sunday Night

    A few clouds. A stray shower or thunderstorm is possible. Low 66F. Winds light and variable.

  • Monday

    Sunshine and clouds mixed. High 91F. Winds S at 5 to 10 mph.

  • Monday Night

    A few clouds. Low 68F. Winds light and variable.

  • Tuesday

    Intervals of clouds and sunshine. High 92F. Winds S at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy skies. Low 68F. Winds light and variable.

  • Wednesday

    Except for a few afternoon clouds, mainly sunny. High 93F. Winds S at 5 to 10 mph.

  • Wednesday Night

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

  • Thursday

    Plentiful sunshine. High 94F. Winds SSE at 5 to 10 mph.

  • Thursday Night

    Clear. Low around 70F. Winds light and variable.

  • Friday

    Mostly sunny skies. High 93F. Winds light and variable.

  • Friday Night

    Clear skies. Low 69F. Winds light and variable.

  • Saturday

    Plentiful sunshine. High 92F. Winds ENE at 5 to 10 mph.

  • Saturday Night

    Mostly clear skies. Low 68F. Winds light and variable.

  • Sunday

    Generally sunny despite a few afternoon clouds. High 92F. Winds NE at 5 to 10 mph.

  • Sunday Night

    A few clouds. Low 68F. Winds light and variable.

  • Monday

    Sunshine along with some cloudy intervals. High 88F. Winds NNW at 5 to 10 mph.

  • Monday Night

    Mostly cloudy with showers and a few thunderstorms. Low 66F. Winds light and variable. Chance of rain 60%.

  • Tuesday

    Showers early then scattered thunderstorms developing later in the day. High 84F. Winds N at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Mostly cloudy with showers and a few thunderstorms. Low 62F. Winds N at 5 to 10 mph. Chance of rain 40%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Collinsville Illinois, Collinsville, IL

Updated: 10:30 PM CDT

Temperature: 74.3 °F Dew Point: 72 °F Humidity: 92% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Tim and Carolyns yard, COLLINSVILLE, IL

Updated: 10:31 PM CDT

Temperature: 73.6 °F Dew Point: 70 °F Humidity: 90% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Stonebridge Farms, Maryville, IL

Updated: 10:31 PM CDT

Temperature: 73.0 °F Dew Point: 68 °F Humidity: 86% Wind: SE at 2.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 10:30 PM CDT

Temperature: 72.9 °F Dew Point: 68 °F Humidity: 85% Wind: Calm Pressure: 29.38 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 10:31 PM CDT

Temperature: 72.3 °F Dew Point: 68 °F Humidity: 87% Wind: SE at 1.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Meadowbrooke, Troy, IL

Updated: 10:26 PM CDT

Temperature: 71.4 °F Dew Point: 68 °F Humidity: 90% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Nolan Creek Subdivision, OFallon, IL

Updated: 10:18 PM CDT

Temperature: 73.3 °F Dew Point: 69 °F Humidity: 86% Wind: ESE at 1.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Fairwood Hills, OFallon, IL

Updated: 10:30 PM CDT

Temperature: 73.9 °F Dew Point: 72 °F Humidity: 92% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Birmingham Drive, Glen Carbon, IL

Updated: 10:25 PM CDT

Temperature: 73.2 °F Dew Point: 66 °F Humidity: 78% Wind: North at - Pressure: 30.07 in Hourly Precipitation: - Heat Index: 74 °F Graphs

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

Updated: 10:23 PM CDT

Temperature: 71.1 °F Dew Point: 65 °F Humidity: 82% Wind: Calm Pressure: 30.01 in Hourly Precipitation: - Heat Index: 71 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 10:31 PM CDT

Temperature: 73.9 °F Dew Point: 69 °F Humidity: 86% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: PRAIRIE LAWN, OFallon, IL

Updated: 10:23 PM CDT

Temperature: 72.7 °F Dew Point: 68 °F Humidity: 84% Wind: Calm Pressure: 29.99 in Hourly Precipitation: - Heat Index: 72 °F Graphs

Location: StormGrl2001, Fairview Heights, IL

Updated: 6:41 PM CDT

Temperature: 77.2 °F Dew Point: 70 °F Humidity: 78% Wind: Calm Pressure: 29.93 in Hourly Precipitation: - Heat Index: 79 °F Graphs

Location: Chalet Court, Fairview Heights, IL

Updated: 10:31 PM CDT

Temperature: 73.4 °F Dew Point: 68 °F Humidity: 82% Wind: North at - Pressure: 30.11 in Hourly Precipitation: - Heat Index: 73 °F Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 10:31 PM CDT

Temperature: 73.2 °F Dew Point: 69 °F Humidity: 86% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 10:25 PM CDT

Temperature: 74.5 °F Dew Point: 69 °F Humidity: 83% Wind: Calm Pressure: 29.96 in Hourly Precipitation: - Heat Index: 74 °F Graphs

Location: 27th Street, Granite City, IL

Updated: 10:25 PM CDT

Temperature: 76.8 °F Dew Point: 70 °F Humidity: 78% Wind: North at - Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Kelly Greens Weather Station, Edwardsville, IL

Updated: 10:31 PM CDT

Temperature: 71.1 °F Dew Point: 69 °F Humidity: 93% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 10:29 PM CDT

Temperature: 72.9 °F Dew Point: 70 °F Humidity: 89% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 10:30 PM CDT

Temperature: 72.2 °F Dew Point: 69 °F Humidity: 89% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 10:30 PM CDT

Temperature: 73.8 °F Dew Point: 64 °F Humidity: 70% Wind: South at 2.7 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: North Horner Park, Lebanon, IL

Updated: 10:30 PM CDT

Temperature: 72.0 °F Dew Point: 60 °F Humidity: 67% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Village of Shiloh, OFallon, IL

Updated: 10:30 PM CDT

Temperature: 71.4 °F Dew Point: 67 °F Humidity: 85% Wind: South at 1.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Lake Christine, Belleville, IL

Updated: 10:25 PM CDT

Temperature: 72.7 °F Dew Point: 68 °F Humidity: 84% Wind: Calm Pressure: 29.86 in Hourly Precipitation: - Heat Index: 72 °F Graphs

Location: West End, Belleville, IL

Updated: 10:30 PM CDT

Temperature: 73.8 °F Dew Point: 51 °F Humidity: 63% Wind: SSW at 3.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: APRSWXNET, Belleville, IL

Updated: 10:00 PM CDT

Temperature: 73 °F Dew Point: 69 °F Humidity: 86% Wind: ESE at 1 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

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

Updated: 10:30 PM CDT

Temperature: 71.4 °F Dew Point: 68 °F Humidity: 88% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Belleville, IL, Belleville, IL

Updated: 10:30 PM CDT

Temperature: 73.4 °F Dew Point: 61 °F Humidity: 66% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Downtown West, Saint Louis, MO

Updated: 10:25 PM CDT

Temperature: 77.5 °F Dew Point: 67 °F Humidity: 69% Wind: North at - Pressure: 30.08 in Hourly Precipitation: - Heat Index: 79 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated 
National Weather Service St Louis MO 
840 PM CDT Sat Aug 29 2015 


Update: 
issued at 838 PM CDT Sat Aug 29 2015 


No big changes to the forecast. Very isolated showers continue to 
perculate across the center of the County Warning Area near a shear axis/weak 
front. This will probably continue most of the night as a weak low 
level jet develops and aids the lift overhead. 


Cvking 


&& 


Short term: (through late tonight) 
issued at 333 PM CDT Sat Aug 29 2015 


Showers have moved out of the County Warning Area for the moment as water vapor 
imagery is currently showing that a weak upper low is moving east 
across southeast Missouri. There is also a shortwave trough 
extending from the Great Lakes into far northeast Missouri and 
a vorticity maximum over southwest Missouri that is moving eastward. The 
rap shows some weak ascent along the trough axis as it moves east 
southeast this evening across northeast Missouri and west central 
Illinois while there is also some increased ascent across areas 
south of I-70 associated with the vorticity maximum. In addition...the rap 
is showing some increase in low level moisture convergence 
associated with the vorticity maximum. Will go with a chance of showers and 
thunderstorms over the southeastern half of the County Warning Area this 
evening...with lessening chances overnight as the moisture 
convergence weakens and moves off to the east. 


Britt 


Long term: (sunday through next saturday) 
issued at 333 PM CDT Sat Aug 29 2015 


(sunday through tuesday) 


The upper level trough axis will be slow to move out of the area as 
an upper level ridge builds over it across the upper Midwest on 
Sunday and Monday. This will keep the upper level trough over the 
area at least through Sunday which will supply some lift over the 
area through the day. Runs of the cams suggest that convective 
coverage will be scattered during the day so have upped probability of precipitation to 30 
percent in most areas. GFS and NAM begin to become more uncertain 
on location of trough axis by Monday...so went with dry forecast 
though it is possible that the trough axis could well end up in 
southern Missouri and bring the southern County Warning Area a slight chance of 
thunderstorms. Will also keep Tuesday dry for now...though the NAM 
would bring a weak shortwave trough across the area during the day 
that may bear watching. 


Went on the warm side of guidance through the period as we will be 
mixing down air from the 800-850mb layer...particularly on Monday 
and Tuesday which has temperatures around +20c which favors 
temperatures going back above normal. 


(Wednesday through next saturday) 


Area will be mainly dry late week into next weekend as upper 
ridge axis that extends from the Central Plains into the upper 
Midwest on Thursday will shift over Missouri and Illinois by 
Saturday. Consequently...surface ridge will linger over Missouri 
and Illinois through the medium range period. Temperatures will be 
at or slightly above normal as we go into the Holiday weekend as 
850mb temperatures remain close to +20c. 


Britt 


&& 


Aviation: (for the 00z tafs through 00z Sunday evening) 
issued at 624 PM CDT Sat Aug 29 2015 


Specifics for KUIN, kcou: sh/ts have developed near KUIN, 
therefore will maintain thunderstorms in the vicinity for the first hour of the taf 
period. Loss of daytime heating should end the sh/ts concern for 
the rest of the evening. Next forecast issue is either fog or 
stratus overnight. Since there has been little clearing of the 
existing cloud deck today, stratus appears more likely than fog. 
Winds will remain light/variable overnight in vicinity of a decaying frontal 
boundary, then become southerly tomorrow morning. 


Specifics for kstl, ksus, kcps: sh/ts have developed northwest of 
the St. Louis metropolitan area, therefore it seems prudent to keep thunderstorms in the vicinity 
in the tafs at ksus and kstl for the next hour. Loss of daytime 
heating should end the sh/ts concern for the evening. Next issue 
is either fog or stratus overnight. At this time it looks like MVFR to IFR 
stratus is more likely to occur north and west of the terminals, 
but the potential will need to be reassessed at the 06z issuance 
based on satellite trends. 


Kanofsky 


&& 


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


$$ 


Weather forecast office lsx 



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