Click on button above to view IL Watches/Warnings/Special Wx Statements.


St Clair County, IL Weather and Climate Synopsis

To access other UK Agricultural Weather Center Pages use the pull-down menu below.

(Click image to zoom) or Click Here

36 Hr. Forecast Map
All Radar images NOAA/UKAWC
Satellite images from NOAA

Weather Summary Hourly Observations Nowcast Agricultural Weather Outlook
7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts





US Weekly Rainfall Departure



US Weekly Temperature Departure
Also see:




A joint service of the UK Ag Weather Center and the National Weather Service.

Weather Summary For Central And Southeast Illinois
National Weather Service Lincoln IL
858 PM CDT Wed Jul 31 2019

Cirrus clouds moved across western Illinois this evening, as a
band of rainfall slid through eastern Missouri. Temperatures late
evening were beginning to fall into the 60s.

The dry and seasonable weather pattern will continue through the
remainder of this week and into the weekend. As High pressure
slides toward the East Coast this weekend, temperatures will climb
back into the upper 80s to near 90 by Sunday.

Lows tonight will drop into the mid 50s to mid 60s. Highs Thursday
will peak in the upper 70s across northeast Indiana, increasing
southwest to the mid 80s in Missouri.

National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

Click here for UKAWC Point Agricultural, Lawn & Garden Forecast/Outlook in case of corrupt tables.
Regional Hourly Observations For ST CLAIR County
Issued at 700 AM CDT THU MAR 28 2024

SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          CLEAR     30  28  93 VRB3      30.21S TC  -1           
BELLEVILLE     CLEAR     35  32  90 CALM      30.21R TC   2           
CAHOKIA*       CLEAR     31  29  92 CALM      30.21R TC  -1           
SPARTA*        CLEAR     32  31  98 S3        30.23S TC   0           

Current Temperatures, Dewpoint Map, RH, Wind, Regional Obs, Surface 4-Panel
Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford


Current Agricultural Weather Conditions in Illinois
Based on observations at 700am CDT, Thursday March 28, 2024

Across Illinois...temperatures are near 30 degrees north, near 29 degrees central, and near 27 degrees south. Current sky conditions are cloudy north, clear central, and clear south. In the north, relative humidity is near 78%, and the dew point is near 24 degrees. In the central part of the state, relative humidity is near 89%, and the dew point is near 26 degrees. In the south, relative humidity is near 100%, and the dew point is near 27 degrees. Winds are from the south at 5 mph north, where conditions are favorable for spraying. The wind chill is near 25 degrees north. Winds are from the south at 10 mph central, where conditions are favorable for spraying. The wind chill is near 20 degrees central. Winds are calm south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 230/ degrees at Northerly Island. The lowest temperature is 25 degrees at Waukegan.


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

US Radar, All NWS Radars (In near-real time),Livestock Heat Stress Index (LSI), Wind Chill Map
Hazardous Weather Outlook For ST CLAIR County,IL

258 AM CDT Thu Mar 28 2024

 DAY ONE  Today and tonight.

No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Friday through Wednesday.

There is a chance of thunderstorms across parts of the area from
Friday night through Tuesday.

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not expected at this time.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For ST CLAIR County, IL
654 AM CDT Thu Mar 28 2024

TODAY
Sunny. Not as cool with highs in the mid 60s. Southwest winds 5 to 10 mph.

TONIGHT
Mostly clear. Not as cool with lows in the mid 40s. Southwest winds 5 to 10 mph.

FRIDAY
Mostly sunny. Highs in the lower 70s. South winds 15 to 20 mph.

FRIDAY NIGHT
Partly cloudy with a 20 percent chance of showers. Not as cool with lows in the mid 50s. South winds 10 to 15 mph with gusts up to 30 mph.

SATURDAY
Partly sunny. A slight chance of showers in the afternoon. Highs in the mid 70s. West winds 10 to 15 mph. Chance of rain 20 percent.

SATURDAY NIGHT
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 50s. Chance of rain 40 percent.

SUNDAY AND SUNDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms. Highs in the mid 70s. Lows around 60. Chance of rain 50 percent.

MONDAY AND MONDAY NIGHT
Showers likely with a chance of thunderstorms. Highs in the upper 70s. Lows around 50. Chance of rain 70 percent.

TUESDAY
Partly sunny. A slight chance of showers and thunderstorms in the morning. Much cooler with highs in the lower 60s. Chance of rain 20 percent.

TUESDAY NIGHT
Partly cloudy. Cooler with lows in the upper 30s.

WEDNESDAY
Sunny. Highs in the upper 50s.

12-48 Hr Surface, 12-48 Hr ETA 500mb/Sfc, TWC Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip
NGM 60 Hr Forecast Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford , Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Illinois
                             ILLINOIS                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                 APR 2-APR 6 APR 4-APR 10    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Above      Above     Normal                      
 Precipitation:      Below        Above     Normal     Normal                      

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
MRF 10-Day Forecast Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford

Almanac Information

Thursday March 28, 2024 the 88th Day of Year

---------------------------------------------------
SUN
Declination 3.590000
Distance 0.999721 AU
Rise 06:48 EDT Set 19:20 EDT
Transit Meridian 13:03 EDT
Civil Twilight Begins 06:22 EDT Ends 19:46 EDT

Calculations made for central point in the state.
Time in ET -- and will vary due to location and
elevation -- Priddy


Historical Weather And Climate Facts For Today

MARCH 28TH
HISTORIC WEATHER EVENTS
...1917...
Thane Creek AK reported a snow cover of 190 inches. (The Weather Channel)
...1920...
The worst tornado disaster of record occurred in Chicago IL as a tornado
killed 28 persons and caused three million dollars damage. (David Ludlum)
...1997...
Ten tornadoes tore across the area, affecting the Kentucky counties of 
Adair, Metcalfe, Casey, Green, Larue, Marion, Hardin, Hart, Nelson, and 
Russell; and the Indiana counties of Scott and Jefferson. Two of the 
twisters produced F3 damage. A 28-year-old woman was killed in Metcalfe 
County as she was thrown from her destroyed mobile home. A 40-year-old man 
was killed when his house in Bonnieville (Hart County) was hit by one of 
the F3 tornadoes and blown off its foundation. This tornado injured many 
people when it caused several car accidents as it crossed Interstate 65.
(NWS Louisville)

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky