Collinsville, Illinois Weather Conditions

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Current Conditions

  • 82°
  • Mostly Cloudy
  • Wind: NW 13 mph
  • Humidity: 44%
  • Visibility: 10.0 miles
  • Dew Point: 58°
  • Pressure: 30.04 in. 0
  • Heat Index: 82

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Next 12 Hours

8  pm
11  pm
2  am
5  am
8  am
Clear
Clear
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
77°
69°
66°
65°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Partly Cloudy
  • High: 86 °
  • Low: 68 °
  • Partly Cloudy
  • Friday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 69 °
  • Chance of T-Storms
  • Saturday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 56 °
  • Chance of T-Storms
  • Sunday
  • Overcast
  • High: 69 °
  • Low: 58 °
  • Overcast
  • Monday
  • Mostly Cloudy
  • High: 77 °
  • Low: 61 °
  • Mostly Cloudy

Forecast for Collinsville, Illinois

Updated: 4:02 PM CDT on January 27, 2015

  • Wednesday

    Partly cloudy. Lows overnight in the mid 60s.

  • Wednesday Night

    Partly cloudy skies. A stray shower or thunderstorm is possible. Low 64F. Winds NE at 5 to 10 mph.

  • Thursday

    Sunshine and clouds mixed. A stray thunderstorm is possible. High 86F. Winds SE at 5 to 10 mph.

  • Thursday Night

    Partly cloudy in the evening followed by scattered thunderstorms after midnight. Low 68F. Winds SSE at 5 to 10 mph. Chance of rain 40%.

  • Friday

    Scattered thunderstorms in the morning, with mostly cloudy skies late. High 84F. Winds SSW at 10 to 15 mph. Chance of rain 40%.

  • Friday Night

    Scattered thunderstorms. Low 69F. Winds SSW at 10 to 15 mph. Chance of rain 60%.

  • Saturday

    Mixed clouds and sun with scattered thunderstorms. High 77F. Winds WNW at 10 to 15 mph. Chance of rain 60%. Rainfall possibly over one inch.

  • Saturday Night

    Cloudy. Low 56F. Winds NNE at 10 to 15 mph.

  • Sunday

    Cloudy skies. High 69F. Winds NNE at 10 to 15 mph.

  • Sunday Night

    Cloudy skies. Low 58F. Winds NE at 5 to 10 mph.

  • Monday

    A mix of clouds and sun early, then becoming cloudy later in the day. High 77F. Winds light and variable.

  • Monday Night

    A few clouds. Low 61F. Winds light and variable.

  • Tuesday

    Considerable clouds early. Some decrease in clouds later in the day. High 84F. Winds SE at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy skies. Low near 65F. Winds light and variable.

  • Wednesday

    Partly cloudy. High 87F. Winds SSE at 10 to 15 mph.

  • Wednesday Night

    A few clouds from time to time. Low 69F. Winds SSE at 5 to 10 mph.

  • Thursday

    Partial cloudiness early, with scattered showers and thunderstorms in the afternoon. High 89F. Winds S at 10 to 15 mph. Chance of rain 40%.

  • Thursday Night

    Scattered clouds with the possibility of an isolated thunderstorm developing overnight. Low 71F. Winds S at 5 to 10 mph. Chance of rain 30%.

  • Friday

    Partly cloudy skies. High 89F. Winds S at 5 to 10 mph.

  • Friday Night

    Thunderstorms during the evening, then mainly cloudy overnight. Low 71F. Winds SSE at 5 to 10 mph. Chance of rain 80%.

  • Saturday

    Variable clouds with scattered thunderstorms. High near 85F. Winds NNW at 5 to 10 mph. Chance of rain 60%.

  • Saturday Night

    Isolated thunderstorms during the evening, then skies turning mostly clear overnight. Low near 70F. Winds NNE at 5 to 10 mph. Chance of rain 30%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Collinsville Illinois, Collinsville, IL

Updated: 6:37 PM CDT

Temperature: 78.6 °F Dew Point: 59 °F Humidity: 51% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Collinsville West, Collinsville, IL

Updated: 6:37 PM CDT

Temperature: 80.5 °F Dew Point: 59 °F Humidity: 48% Wind: WNW at 6.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Tim and Carolyns yard, COLLINSVILLE, IL

Updated: 6:37 PM CDT

Temperature: 81.9 °F Dew Point: 60 °F Humidity: 47% Wind: East at 2.2 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Stonebridge Farms, Maryville, IL

Updated: 6:37 PM CDT

Temperature: 78.6 °F Dew Point: 60 °F Humidity: 53% Wind: North at 4.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Rolling Meadows Dr, Maryville, IL

Updated: 6:37 PM CDT

Temperature: 81.5 °F Dew Point: 55 °F Humidity: 40% Wind: SSW at 1.6 mph Pressure: 29.38 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Barbarotto Compound, Maryville, IL

Updated: 6:37 PM CDT

Temperature: 80.1 °F Dew Point: 60 °F Humidity: 50% Wind: NW at 4.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: APRSWXNET, Maryville, IL

Updated: 6:11 PM CDT

Temperature: 80 °F Dew Point: 60 °F Humidity: 50% Wind: NW at 7 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: MesoWest, Fairmont City, IL

Updated: 5:55 PM CDT

Temperature: 84 °F Dew Point: 60 °F Humidity: 45% Wind: SW at 5 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Meadowbrooke, Troy, IL

Updated: 6:26 PM CDT

Temperature: 80.5 °F Dew Point: 60 °F Humidity: 49% Wind: NW at 3.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Nolan Creek Subdivision, OFallon, IL

Updated: 6:24 PM CDT

Temperature: 81.9 °F Dew Point: 61 °F Humidity: 49% Wind: WNW at 4.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Fairwood Hills, OFallon, IL

Updated: 6:37 PM CDT

Temperature: 81.1 °F Dew Point: 60 °F Humidity: 48% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Birmingham Drive, Glen Carbon, IL

Updated: 6:36 PM CDT

Temperature: 85.6 °F Dew Point: 63 °F Humidity: 46% Wind: North at - Pressure: 30.11 in Hourly Precipitation: - Heat Index: 86 °F Graphs

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

Updated: 6:35 PM CDT

Temperature: 79.2 °F Dew Point: 62 °F Humidity: 55% Wind: Calm Pressure: 30.03 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: New Goose, Fairview Heights, IL

Updated: 6:37 PM CDT

Temperature: 80.4 °F Dew Point: 61 °F Humidity: 51% Wind: NNE at 2.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Milam Landfill, East Saint Louis, IL

Updated: 6:22 PM CDT

Temperature: 81.5 °F Dew Point: 59 °F Humidity: 46% Wind: WNW at 7.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: StormGrl2001, Fairview Heights, IL

Updated: 6:31 PM CDT

Temperature: 80.8 °F Dew Point: 63 °F Humidity: 55% Wind: West at 4.2 mph Pressure: 29.91 in Hourly Precipitation: - Heat Index: 82 °F Graphs

Location: Chalet Court, Fairview Heights, IL

Updated: 6:36 PM CDT

Temperature: 80.2 °F Dew Point: 63 °F Humidity: 56% Wind: North at - Pressure: 30.13 in Hourly Precipitation: - Heat Index: 82 °F Graphs

Location: Chateau Estates, Fairview Heights, IL

Updated: 6:37 PM CDT

Temperature: 83.5 °F Dew Point: 59 °F Humidity: 43% Wind: NNW at 4.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Prairie Crossing, OFallon, IL

Updated: 5:28 PM CDT

Temperature: 84.4 °F Dew Point: 70 °F Humidity: 61% Wind: Calm Pressure: 29.82 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Mallard Pointe, Troy, IL

Updated: 6:37 PM CDT

Temperature: 85.6 °F Dew Point: 62 °F Humidity: 46% Wind: NW at 6.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Prairie Manor, Edwardsville, IL

Updated: 6:37 PM CDT

Temperature: 78.6 °F Dew Point: 58 °F Humidity: 50% Wind: NW at 10.5 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: EAST GRANITE, Granite City, IL

Updated: 6:28 PM CDT

Temperature: 85.5 °F Dew Point: 65 °F Humidity: 50% Wind: NE at 1.1 mph Pressure: 30.00 in Hourly Precipitation: - Heat Index: 87 °F Graphs

Location: MesoWest, Granite City, IL

Updated: 4:35 PM CDT

Temperature: 83 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: 27th Street, Granite City, IL

Updated: 6:36 PM CDT

Temperature: 79.2 °F Dew Point: 62 °F Humidity: 56% Wind: North at - Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Dunlap Lake, Edwardsville, IL

Updated: 6:26 PM CDT

Temperature: 83.9 °F Dew Point: 63 °F Humidity: 50% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Grand Ave, Edwardsville, IL

Updated: 6:36 PM CDT

Temperature: 78.3 °F Dew Point: 63 °F Humidity: 59% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Nickel Plate Trail, Edwardsville, IL

Updated: 6:35 PM CDT

Temperature: 77.5 °F Dew Point: 63 °F Humidity: 61% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

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

Updated: 6:37 PM CDT

Temperature: 80.6 °F Dew Point: 65 °F Humidity: 58% Wind: NE at 3.4 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: North Horner Park, Lebanon, IL

Updated: 6:37 PM CDT

Temperature: 80.0 °F Dew Point: 69 °F Humidity: 69% Wind: WNW at 8.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Village of Shiloh, OFallon, IL

Updated: 6:35 PM CDT

Temperature: 82.8 °F Dew Point: 60 °F Humidity: 46% Wind: NNW at 2.0 mph Pressure: 30.10 in Hourly Precipitation: 0.02 in Heat Index: 83 °F Graphs

Location: Lake Christine, Belleville, IL

Updated: 6:25 PM CDT

Temperature: 80.4 °F Dew Point: 62 °F Humidity: 54% Wind: WNW at 2.2 mph Pressure: 29.81 in Hourly Precipitation: - Heat Index: 82 °F Graphs

Location: West End, Belleville, IL

Updated: 6:37 PM CDT

Temperature: 80.4 °F Dew Point: 32 °F Humidity: 35% Wind: NNE at 3.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Branch Street, St. Louis, MO

Updated: 6:30 PM CDT

Temperature: 84.4 °F Dew Point: - Humidity: 39% Wind: North at - Pressure: 29.59 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: BLAIR STREET, St. Louis, MO

Updated: 6:30 PM CDT

Temperature: 84.2 °F Dew Point: - Humidity: 45% Wind: North at - Pressure: 29.40 in Hourly Precipitation: - 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 
611 PM CDT Wed may 27 2015 


Short term: (through late tonight) 
issued at 415 PM CDT Wed may 27 2015 


Cold front has now passed through stl Metro, and should sink a bit 
more south before stalling out over southern sections of the County Warning Area 
this evening. Convergence is quite weak in the vicinity of the 
front, but instability has recovered in the wake of the morning 
complex, with 19z MLCAPES of up to 1500 j/kg over the Ozarks. Have 
continued chance/slight chance pops over this area for the evening 
hours as some development could occur at any time between now and 
7-8pm. Across northern portions of our cwa, the cooler and drier 
air north of the front should make for a very comfortable late may 
evening, with weak surface ridge pushes from northern MO into 
central Illinois. 


While primary threat of convection in our forecast area tonight (such as it is) 
should be tied to the late afternoon/early evening instability 
across the south, have maintained slight chance pops across the 
south throughout the overnight and into the predawn hours as frontal 
boundary will remain parked over this area, in addition, have 
actually pushed these slight chance pops north into mid Missouri by 
daybreak as return flow develops in the wake of the aforementioned 
surface ridge, producing weak overrunning of the stalled front. 
Certainly, greatest lift/moisture return will be west of our cwa, 
but if convection does develop over western MO during the predawn 
hours some of this may activity may be able to trickle into our 
western counties by 12z. 




Truett 


Long term: (thursday through next wednesday) 
issued at 415 PM CDT Wed may 27 2015 


(thursday-saturday) 


12z guidance continues to support earlier forecasts that indicate 
increasingly unsettled conditions as we head into the latter part of 
the week. Today's various 12z nwp outputs are all similar 
synoptically, and indicate a broad southerly flow advecting warm and 
increasing moist air into the mid-Mississippi Valley on Thu-Thu 
night, with several shortwaves ejecting from the upper trof over the 
West Coast interacting with this increasingly unstable airmass over 
the region. For now have gone with fairly broad brush chance pops 
during this time range, with the greatest chances over northwest 
sections of the County Warning Area where dynamics and moisture should be somewhat 
maximized. However, it's certainly possible that meso-scale 
processes will force some short-range adjustments to this thinking. 


Good model consensus continues into the end of the week, with all 
solutions progging a strong cold front across the region from late 
Friday into Saturday as West Coast trof also works into the central 
Continental U.S.. with the ample moisture, strong lift, and instability have 
gone with likely pops as the front traverses the cwa, and its 
certainly possible that these will ultimately be too low. Not 
totally clear on severe weather potential on Friday afternoon and 
Friday night as large scale shear is fairly weak and progged 
soundings look rather soupy, and at this point it appears that 
severe thunderstorm potential will likely hinge on how much 
instability can be attained in the warm sector. 


Temperatures will remain on the warm side through Friday, but are 
expected to drop back into the 70s by Saturday as the cold air 
begins to exert its influence over the area. 


(Sunday-wednesday) 


The cool down that begins on Saturday will intensify on Sunday as 
the strong surface ridge building into the upper Great Lakes sends 
chilly Canadian air into the region. Latest guidance suggests 
clouds along with a few lingering showers/thunderstorms persisting 
over about the southeast half of the cwa, and these clouds and 
potential precip along with the chilly air should mean highs only 
in the 60s for most of the County Warning Area. 


While it looks rather odd for late may, all of the medium range 
solutions are forecasting a cut- off upper low to develop in the 
vicinity of the bootheel on Monday, with this low then gradually 
drifting south with time. Temperature trends during the Mon-Tue 
time frame will indicate a gradual return to near average levels, 
although am wondering if this moderation may be a bit too fast if 
the upper system hangs around. 


Don't see any large precip threat during this time, but did 
continue some low pops in a few spots Mon and Tue with weak 
ripples rotating around the upper low. 


Truett 


&& 


Aviation: (for the 00z tafs through 00z Thursday evening) 
issued at 545 PM CDT Wed may 27 2015 


Cold front has pushed southeast of cps early this evening with 
weak surface ridging behind it over north central MO. Cumulus 
field over the St Louis Metro area should dissipate later this 
evening due to the loss of daytime heating and as the front 
continues to shift slowly southeastard. The surface wind will 
become light later this evening, then become sely on Thursday as 
the surface ridge shifts east of the area and as the front lifts 
back northward as a warm front. Diurnal cumulus clouds will 
develop late Thursday morning and afternoon. There may be isolated 
to scattered showers/storms Thursday afternoon as an upper level 
disturbance approaches with the best coverage likely in the cou 
area. 


Specifics for kstl: cumulus clouds will dissipate early this 
evening, but then redevelop late Thursday morning and afternoon. 
There may be isolated showers/storms Thursday afternoon, but will 
leave the stl taf dry for now. Nwly surface wind will become light 
later this evening, then strengthen to around 8-9 kts by Thursday 
afternoon from a sely direction. 


Gks 


&& 


Preliminary point temperatures/pops: 
Saint Louis 66 85 70 85 / 10 20 30 50 
Quincy 61 82 66 81 / 10 20 40 60 
Columbia 62 81 66 80 / 20 50 40 60 
Jefferson City 63 83 67 80 / 20 50 40 60 
Salem 65 84 68 85 / 20 20 20 40 
Farmington 63 82 66 82 / 30 30 20 50 


&& 


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


$$ 


Weather forecast office lsx 












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