Dekalb, Illinois Weather Conditions

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Current Conditions

  • 30°
  • Overcast
  • Wind: NNW 8 mph
  • Humidity: 67%
  • Visibility: 10.0 miles
  • Dew Point: 20°
  • Pressure: 30.39 in. 0
  • Heat Index: 22

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
27°
27°
34°
41°
43°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Partly Cloudy
  • High: 45 °
  • Low: 25 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 46 °
  • Low: 34 °
  • Partly Cloudy
  • Monday
  • Rain Showers
  • High: 55 °
  • Low: 43 °
  • Rain Showers
  • Tuesday
  • Chance of Rain
  • High: 54 °
  • Low: 34 °
  • Chance of Rain
  • Wednesday
  • Mostly Cloudy
  • High: 55 °
  • Low: 30 °
  • Mostly Cloudy

Forecast for Dekalb, Illinois

Updated: 4:00 AM CDT on November 01, 2014

  • Saturday

    Partly cloudy in the morning, then clear. High of 45F. Winds from the North at 5 to 15 mph.

  • Saturday Night

    Partly cloudy in the evening, then clear. Low of 25F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. Fog early. High of 46F. Winds from the South at 10 to 15 mph.

  • Sunday Night

    Partly cloudy. Low of 34F with a windchill as low as 25F. Winds from the South at 10 to 15 mph.

  • Monday

    Mostly cloudy with a chance of rain in the afternoon. High of 55F. Breezy. Winds from the SSW at 15 to 20 mph. Chance of rain 20%.

  • Monday Night

    Overcast with a chance of rain. Fog overnight. Low of 43F. Winds from the SSW at 10 to 15 mph. Chance of rain 70% with rainfall amounts near 0.5 in. possible.

  • Tuesday

    Overcast with a chance of rain. Fog early. High of 54F. Winds from the SW at 10 to 15 mph shifting to the WNW in the afternoon. Chance of rain 40%.

  • Tuesday Night

    Overcast. Fog overnight. Low of 34F. Winds from the NW at 5 to 10 mph.

  • Wednesday

    Mostly cloudy. High of 55F. Winds from the SW at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 30F. Winds from the SW at 10 to 15 mph.

  • Thursday

    Partly cloudy. High of 48F. Breezy. Winds from the WNW at 20 to 25 mph.

  • Thursday Night

    Partly cloudy. Low of 27F with a windchill as low as 19F. Winds from the NW at 5 to 15 mph.

  • Friday

    Partly cloudy. High of 48F. Winds from the West at 5 to 15 mph shifting to the SSW in the afternoon.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 27F. Winds from the SW at 5 to 15 mph.

  • Saturday

    Overcast with a chance of rain. High of 45F. Winds from the NW at 5 to 10 mph. Chance of rain 40%.

  • Saturday Night

    Overcast with a chance of rain. Fog overnight. Low of 28F. Winds from the WNW at 5 to 10 mph. Chance of rain 20%.

  • Sunday

    Partly cloudy. High of 43F. Winds from the WNW at 5 to 10 mph.

  • Sunday Night

    Partly cloudy. Low of 28F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 43F. Winds from the SW at 5 to 10 mph.

  • Monday Night

    Partly cloudy. Low of 30F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy. High of 48F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 30F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 5:03 AM CDT

Temperature: 30.8 °F Dew Point: 22 °F Humidity: 71% Wind: NW at 2.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Northern Illinois University, DeKalb, IL

Updated: 5:03 AM CDT

Temperature: 31.5 °F Dew Point: 23 °F Humidity: 70% Wind: NNW at 1.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 5:00 AM CDT

Temperature: 30.8 °F Dew Point: 22 °F Humidity: 71% Wind: NE at 3.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: DeKalb, IL

Updated: 4:52 AM CDT

Temperature: 32.2 °F Dew Point: 23 °F Humidity: 69% Wind: North at 5.0 mph Pressure: 30.40 in Hourly Precipitation: - Windchill: 27 °F Graphs

Location: Sycamore, IL

Updated: 5:03 AM CDT

Temperature: 31.7 °F Dew Point: 22 °F Humidity: 68% Wind: NNW at 6.0 mph Pressure: 30.44 in Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: MesoWest IL-64 @ Virgil Drainage Ditch IL US ILDOT, Sycamore, IL

Updated: 4:27 AM CDT

Temperature: 33 °F Dew Point: 24 °F Humidity: 70% Wind: NNW at 9 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 26 °F Graphs

Location: Heron Creek, Sycamore, IL

Updated: 5:03 AM CDT

Temperature: 31.5 °F Dew Point: 22 °F Humidity: 67% Wind: NW at 2.0 mph Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 5:03 AM CDT

Temperature: 31.5 °F Dew Point: 23 °F Humidity: 70% Wind: Calm Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 5:03 AM CDT

Temperature: 31.8 °F Dew Point: 24 °F Humidity: 71% Wind: NNW at 2.0 mph Pressure: 30.43 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Country Meadows, Kirkland, IL

Updated: 4:51 AM CDT

Temperature: 30.7 °F Dew Point: 21 °F Humidity: 67% Wind: NW at 3.0 mph Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: MesoWest ELBRN1 IL US UPR, Elburn, IL

Updated: 4:05 AM CDT

Temperature: 33 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Genoa Road, Genoa, IL

Updated: 5:01 AM CDT

Temperature: 32.6 °F Dew Point: 25 °F Humidity: 73% Wind: NNW at 3.0 mph Pressure: 30.44 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Columbine Square, Elburn, IL

Updated: 4:55 AM CDT

Temperature: 33.0 °F Dew Point: 24 °F Humidity: 70% Wind: North at 6.0 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 5:00 AM CDT

Temperature: 34.4 °F Dew Point: 25 °F Humidity: 69% Wind: NNW at 2.0 mph Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Cheval-De-Selle, Elburn, IL

Updated: 1:50 AM CDT

Temperature: 31.8 °F Dew Point: 21 °F Humidity: 65% Wind: NNE at 4.2 mph Pressure: 30.30 in Hourly Precipitation: - Windchill: 28 °F Graphs

Location: MesoWest I-39 @ MP 81 / Lee County IL US ILDOT, Steward, IL

Updated: 4:26 AM CDT

Temperature: 28 °F Dew Point: 21 °F Humidity: 77% Wind: North at 13 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 17 °F Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 5:03 AM CDT

Temperature: 32.9 °F Dew Point: 23 °F Humidity: 67% Wind: North at 4.0 mph Pressure: 30.45 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: K9GPC, Rochelle, IL

Updated: 5:03 AM CDT

Temperature: 22.8 °F Dew Point: -11 °F Humidity: 21% Wind: NW at 8.3 mph Pressure: 29.62 in Hourly Precipitation: 0.00 in Windchill: 13 °F Graphs

Location: CamptonHillsWeather.com Central Kane County, St Charles, IL

Updated: 5:03 AM CDT

Temperature: 33.4 °F Dew Point: 24 °F Humidity: 69% Wind: North at 4.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: OakGrove, Hampshire, IL

Updated: 5:02 AM CDT

Temperature: 32.9 °F Dew Point: 25 °F Humidity: 72% Wind: North at 9.9 mph Pressure: 30.29 in Hourly Precipitation: - Windchill: 25 °F Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 5:03 AM CDT

Temperature: 34.0 °F Dew Point: 22 °F Humidity: 60% Wind: North at 7.0 mph Pressure: 30.43 in Hourly Precipitation: 0.00 in Windchill: 28 °F Graphs

Location: Windswept Acres, Marengo, IL

Updated: 5:00 AM CDT

Temperature: 33.6 °F Dew Point: 25 °F Humidity: 71% Wind: NNW at 2.0 mph Pressure: 30.40 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Mill Creek, Geneva, IL

Updated: 5:02 AM CDT

Temperature: 33.3 °F Dew Point: 23 °F Humidity: 67% Wind: NW at 1.0 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 5:03 AM CDT

Temperature: 34.0 °F Dew Point: 25 °F Humidity: 68% Wind: NNW at 1.0 mph Pressure: 30.46 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 3:30 AM CDT

Temperature: 29 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: WB9NJJ, Rochelle, IL

Updated: 5:03 AM CDT

Temperature: 27.1 °F Dew Point: 1 °F Humidity: 32% Wind: NW at 3.1 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 24 °F Graphs

Location: Thornwood, South Elgin, IL

Updated: 4:50 AM CDT

Temperature: 33.8 °F Dew Point: 25 °F Humidity: 69% Wind: NNE at 4.7 mph Pressure: 30.28 in Hourly Precipitation: - Windchill: 29 °F Graphs

Location: Sweetbriar Place, Plano, IL

Updated: 5:00 AM CDT

Temperature: 41.0 °F Dew Point: 24 °F Humidity: 50% Wind: North at - Pressure: 30.46 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Plano, Plano, IL

Updated: 4:59 AM CDT

Temperature: 33.9 °F Dew Point: 24 °F Humidity: 68% Wind: Calm Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Creek Side, Elgin, IL

Updated: 5:03 AM CDT

Temperature: 34.9 °F Dew Point: 24 °F Humidity: 65% Wind: North at 1.3 mph Pressure: 29.46 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Waterford Oaks, North Aurora, IL

Updated: 5:03 AM CDT

Temperature: 34.0 °F Dew Point: 25 °F Humidity: 68% Wind: NNW at 2.0 mph Pressure: 30.40 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: West Batavia, Batavia, IL

Updated: 4:57 AM CDT

Temperature: 34.0 °F Dew Point: 24 °F Humidity: 68% Wind: North at 4.0 mph Pressure: 30.37 in Hourly Precipitation: - Windchill: 30 °F Graphs

Location: Rural--2.75 mi WSW Sandwich, IL, Sandwich, IL

Updated: 4:59 AM CDT

Temperature: 33.3 °F Dew Point: 17 °F Humidity: 51% Wind: NW at 12.5 mph Pressure: 30.40 in Hourly Precipitation: 0.00 in Windchill: 24 °F Graphs

Location: Gilberts, IL, Gilberts, IL

Updated: 5:03 AM CDT

Temperature: 33.1 °F Dew Point: 22 °F Humidity: 63% Wind: NE at 3.1 mph Pressure: 30.57 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Belvidere, Belvidere, IL

Updated: 4:51 AM CDT

Temperature: 32.0 °F Dew Point: 20 °F Humidity: 62% Wind: NNE at 5.8 mph Pressure: 30.19 in Hourly Precipitation: - Windchill: 26 °F Graphs

Location: MesoWest I-39 @ Kishwaukee River Bridge IL US ILDOT, Rockford, IL

Updated: 4:26 AM CDT

Temperature: 30 °F Dew Point: 17 °F Humidity: 57% Wind: North at 7 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 23 °F Graphs

Location: Hunt Club, St. Charles, IL

Updated: 5:03 AM CDT

Temperature: 34.0 °F Dew Point: 25 °F Humidity: 69% Wind: NE at 2.5 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Chicago/Romeoville Illinois 
404 am CDT Sat Nov 1 2014 


Short term... 
330 am CDT 


Saturday through Sunday... 


There is a highly amplified flow pattern across the Continental 
United States. A large upper trough is off the Pacific coast...with 
an upper ridge across the center of the country and extending into 
north central Canada. Meanwhile...the massive anomalous upper low 
associated with the active weather to begin the weekend over our 
area Friday continues to dig southeast of the region early this 
morning...driving temperatures into the 30s as far south as central 
Georgia. A modest surface pressure gradient remains draped over Lake 
Michigan on the back side of the departing upper low as strong 
surface high pressure builds east...with the center of the high 
currently sprawled out from Northern Lake Superior southeast to the 
Southern Plains. 


Radar continues to show much less organization to lake effect snow 
early this morning as deep level relative humidity values decline 
significantly...and soundings continue to show a rapid decline in 
inversion heights. Winds will also continue the downward trend as 
the surface high to the west becomes centered over NE Illinois later 
this afternoon...but winds off the lake with less friction still are 
blowing pretty good along the shoreline. Low level flow will remain 
out of the northeast into at least early afternoon...and soundings 
continue to show the low level moisture remains trapped under the 
inversion awhile longer...which will allow low clouds to linger for 
some time today...and even some continued light lake effect 
showers/flurries through the morning. This will keep readings from 
getting out of the 40s today. Finally tonight the high is 
generally overhead. This will allow for a decent radiations 
cooling setup as winds slacken and skies clear. Expect lows to 
dip into the 20s. Variable cloudiness due to any lingering lower 
cloud and higher clouds pushing over the upper ridge to the west 
may keep things in check a bit...but expect even the urban areas 
to get down to near 30. 


On Sunday the upper ridge in the center of the country will be 
moving overhead as the surface high shifts to the east...meaning dry 
conditions continue. Lower level warm advection under SW flow will 
allow for some warming after the cool start. Expect afternoon 
breezes and readings to get into the 50s...still cool. 


Kmd 


&& 


Long term... 
330 am CDT 


Monday through Friday... 


The next batch of precipitation will heading our way later Monday 
into Tuesday as the trough off the Pacific moves through the Continental U.S.. 
warm advection will be in place ahead of the trough as the main 
surface low organizes in Canada...which despite increasing cloud 
cover should push temperatures well through the 50s to near 60. On Monday the 
trough axis slides through Monday night with a weak cold front 
which will be the best chance for some rain showers before 
shifting to the east. A decent baroclinic zone...upper jet...and 
modest moisture will bring some rain to most areas. Near normal 
readings in the middle 50s are expected. 


Wednesday looks fairly quiet as surface high pressure builds in. 
Another Pacific system in northwest flow aloft will traverse the area Wednesday 
into Thursday bringing another chance of rain...best chance for areas 
east. Afterwards...behind the cold front...conditions dry out and 
readings dip back into the 40s to near 50. 


Kmd 


&& 


Aviation... 


//Ord and mdw concerns...updated 09z... 


* north winds occasionally gusting 20-25 knots through daybreak then 
easing to 18-20 knots. 


* VFR ceilings lowering to near MVFR this morning. 


Mdb 


//discussion...updated 06z... 


High pressure continues to approach from the west which is helping 
north winds to slowly diminish across northern Illinois away from 
the lake. Northwest Indiana continues to see higher gusts and 
although gyy has not reported suspect gusts around 40 knots are 
continuing. These gusts will ease overnight as well but will 
probably remain up near 30 knots. Lake effect snow bands have waned 
over the past few hours but will likely see continued light snow 
showers at Ord/mdw/gyy but at this point see little in the way of 
visibility reduction. These should come to an end later this morning. 
Ceilings remain mainly VFR but cannot rule out some MVFR patches. Ceilings 
may lower to MVFR toward daybreak but this could end up being a 
little pessimistic. 


North to northeast winds will gust to near 20 knots during the day 
today across northeast Illinois and Northwest Indiana with few gusts across 
north-central Illinois. Any MVFR will gradually lift to VFR with 
scattering from west to east. High pressure will move overhead 
tonight allowing winds to drop off with sunset this evening. 


Mdb 


//Ord and mdw confidence...updated 09z... 


* high confidence in wind forecast. 


* High confidence in ceilings lowering somewhat through daybreak. Low- 
medium confidence in lowering to MVFR and duration of MVFR if it 
occurs. 


Mdb 


//outlook for Ord/mdw for 12z Sunday-12z Friday...updated 00z... 


Sunday...dry/VFR. South winds 10-15 knots. 


Monday...dry/VFR during the day. Rain showers likely Monday night. Gusty 
southwest winds 15-20 knots. 


Tuesday...shra/MVFR likely. Southwest winds. 


Wednesday...dry/VFR. Southwest winds. 


Thursday...dry/VFR. West-northwest winds. 


Ratzer 


&& 


Marine... 
305 am CDT 


High pressure will steadily build across Lake Michigan today 
bringing steadily diminishing north to northeast winds. The pressure 
gradient remains quite strong across the far southern sections of 
the lake early this morning with some observations still reporting 
lower end gales. The south buoy continues to gust to around 30 knots 
with some shore sites pushing 35-40 knots. With some land breeze 
convergence setting up some of the coastal observation along the WI/Illinois 
shoreline have turned north-northwest and and therefore are not representing the 
flow over the lake. This is evidenced by the sharp drop off in wind 
speeds with a shift from north-northeast to north-northwest...while sites that are still north-northeast 
continue to show 35-40 knots. With the downward trend and a steadily 
shrinking area of higher wind speeds as the high builds in will 
allow the Gale Warning to expire at 09z for the open waters and the 
nearshore. Will mention a few 35 knots gusts in the text products early 
this morning but expect these to be diminished by daybreak if not 
sooner. Given the continued large waves across the Illinois/in nearshore 
waters will hoist a Small Craft Advisory through the afternoon into 
early evening. 


The high will be overhead by evening then shift to the south and 
east tonight. Low pressure over the northern rockies will move 
northeast into southern Manitoba later Sunday which will set up a 
tightening pressure gradient across Lake Michigan. This will lead to 
an increase in southwesterly winds through the day Sunday...with 
gusts pushing 30 knots at times Sunday evening and Sunday night. The 
gradient will slacken north Monday morning allowing winds to ease up 
across northern areas. The low will continue northward towards 
Hudson Bay Monday night with a cold front trailing it and crossing 
the lake Monday night/Tuesday morning. The pressure gradient will 
tighten up somewhat ahead of the front allowing winds to increase 
modestly across central and southern sections of the lake later 
Monday...before they shift to the west behind the front Tuesday. 
Weak high pressure then builds in Wednesday. Another low is forecast 
to pass over or near the lake Wednesday night bringing another 
increase in winds from the northwest behind it...with fairly strong 
gusts possible thanks to another push of colder air behind an 
associated cold front. 


Mdb 


&& 


Lot watches/warnings/advisories... 
Illinois...none. 
In...none. 
Lm...Small Craft Advisory...nearshore waters 
until 10 PM Saturday. 


&& 


$$ 


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