Dekalb, Illinois Weather Conditions

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Current Conditions

  • 34°
  • Clear
  • Wind: East 10 mph
  • Humidity: 81%
  • Visibility: 10.0 miles
  • Dew Point: 29°
  • Pressure: 30.35 in. 0
  • Heat Index: 26

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Next 12 Hours

7  am
10  am
1  pm
4  pm
7  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
32°
46°
59°
63°
61°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Clear
  • High: 64 °
  • Low: 41 °
  • Clear
  • Sunday
  • Partly Cloudy
  • High: 73 °
  • Low: 52 °
  • Partly Cloudy
  • Monday
  • Rain Showers
  • High: 68 °
  • Low: 43 °
  • Rain Showers
  • Tuesday
  • Partly Cloudy
  • High: 63 °
  • Low: 36 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 59 °
  • Low: 39 °
  • Partly Cloudy

Forecast for Dekalb, Illinois

Updated: 4:00 AM CDT on April 19, 2014

  • Saturday

    Clear. High of 64F. Winds from the SE at 10 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 41F. Winds from the SSE at 10 to 15 mph.

  • Sunday

    Partly cloudy. High of 73F. Winds from the SSW at 10 to 15 mph.

  • Sunday Night

    Mostly cloudy with a chance of rain after midnight. Low of 52F. Winds from the SSW at 5 to 15 mph. Chance of rain 20%.

  • Monday

    Overcast with rain showers. High of 68F. Winds from the SW at 5 to 10 mph. Chance of rain 60%.

  • Monday Night

    Clear with a chance of rain. Fog overnight. Low of 43F. Winds from the NW at 5 to 15 mph.

  • Tuesday

    Partly cloudy. Fog early. High of 63F. Winds from the NNW at 10 to 15 mph.

  • Tuesday Night

    Partly cloudy in the evening, then clear. Low of 36F. Winds from the ENE at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High of 59F. Winds from the SSE at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 39F. Winds from the SE at 10 to 15 mph.

  • Thursday

    Overcast with a chance of rain. High of 68F. Breezy. Winds from the South at 15 to 20 mph. Chance of rain 20%.

  • Thursday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 52F. Winds from the South at 10 to 15 mph shifting to the WSW after midnight. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Friday

    Partly cloudy. High of 64F. Breezy. Winds from the WSW at 10 to 20 mph.

  • Friday Night

    Partly cloudy. Low of 45F. Winds from the WNW at 10 to 15 mph.

  • Saturday

    Mostly cloudy. High of 57F. Winds from the NNW at 5 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 36F. Winds from the NNE at 5 to 10 mph.

  • Sunday

    Clear. High of 54F. Winds from the NE at 5 to 10 mph.

  • Sunday Night

    Partly cloudy. Low of 41F. Winds from the ENE at 5 to 10 mph.

  • Monday

    Mostly cloudy. High of 57F. Winds from the ENE at 5 to 10 mph.

  • Monday Night

    Mostly cloudy. Low of 45F. Winds less than 5 mph.

  • Tuesday

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

  • Tuesday Night

    Clear. Low of 45F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 6:56 AM CDT

Temperature: 35.9 °F Dew Point: 31 °F Humidity: 81% Wind: NE at 4.0 mph Pressure: 30.35 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Northern Illinois University, DeKalb, IL

Updated: 6:56 AM CDT

Temperature: 36.4 °F Dew Point: 30 °F Humidity: 79% Wind: East at 5.0 mph Pressure: 30.27 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: DeKalb, IL

Updated: 6:46 AM CDT

Temperature: 34.7 °F Dew Point: 31 °F Humidity: 86% Wind: ENE at 5.0 mph Pressure: 30.33 in Hourly Precipitation: - Windchill: 30 °F Graphs

Location: Sycamore, IL

Updated: 6:56 AM CDT

Temperature: 35.8 °F Dew Point: 30 °F Humidity: 81% Wind: ENE at 8.0 mph Pressure: 30.41 in Hourly Precipitation: 0.00 in Windchill: 29 °F Graphs

Location: Heron Creek, Sycamore, IL

Updated: 6:56 AM CDT

Temperature: 36.8 °F Dew Point: 30 °F Humidity: 77% Wind: ENE at 5.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 6:56 AM CDT

Temperature: 37.8 °F Dew Point: 31 °F Humidity: 77% Wind: ENE at 12.1 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Out On the Farm, Clare, IL

Updated: 6:43 AM CDT

Temperature: 33.9 °F Dew Point: 30 °F Humidity: 86% Wind: East at 3.0 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 6:56 AM CDT

Temperature: 35.4 °F Dew Point: 32 °F Humidity: 88% Wind: Calm Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Country Meadows, Kirkland, IL

Updated: 6:45 AM CDT

Temperature: 34.6 °F Dew Point: 30 °F Humidity: 83% Wind: East at 5.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: MesoWest ELBRN1 IL US UPR, Elburn, IL

Updated: 4:25 AM CDT

Temperature: 35 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Genoa Road, Genoa, IL

Updated: 6:55 AM CDT

Temperature: 34.6 °F Dew Point: 31 °F Humidity: 88% Wind: ENE at 4.0 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Columbine Square, Elburn, IL

Updated: 6:44 AM CDT

Temperature: 35.8 °F Dew Point: 30 °F Humidity: 80% Wind: North at 2.0 mph Pressure: 30.31 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 6:55 AM CDT

Temperature: 38.0 °F Dew Point: 32 °F Humidity: 80% Wind: ENE at 7.0 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

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

Updated: 6:30 AM CDT

Temperature: 36 °F Dew Point: 32 °F Humidity: 84% Wind: North at 14 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 6:56 AM CDT

Temperature: 35.8 °F Dew Point: 29 °F Humidity: 77% Wind: East at 6.0 mph Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: K9GPC, Rochelle, IL

Updated: 6:56 AM CDT

Temperature: 34.7 °F Dew Point: 6 °F Humidity: 30% Wind: East at 5.8 mph Pressure: 29.56 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

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

Updated: 6:56 AM CDT

Temperature: 35.9 °F Dew Point: 31 °F Humidity: 83% Wind: East at 4.0 mph Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: OakGrove, Hampshire, IL

Updated: 6:48 AM CDT

Temperature: 34.9 °F Dew Point: 29 °F Humidity: 80% Wind: SE at 7.3 mph Pressure: 30.26 in Hourly Precipitation: - Windchill: 29 °F Graphs

Location: Geneva, IL

Updated: 6:55 AM CDT

Temperature: 36.4 °F Dew Point: 31 °F Humidity: 81% Wind: WNW at 4.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 33 °F Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 6:56 AM CDT

Temperature: 36.2 °F Dew Point: 31 °F Humidity: 81% Wind: ENE at 1.0 mph Pressure: 30.40 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Windswept Acres, Marengo, IL

Updated: 6:55 AM CDT

Temperature: 35.3 °F Dew Point: 31 °F Humidity: 85% Wind: NW at 1.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Hidden Farms Estates, Marengo, IL

Updated: 6:56 AM CDT

Temperature: 34.8 °F Dew Point: 29 °F Humidity: 80% Wind: East at 2.0 mph Pressure: 30.39 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Mill Creek, Geneva, IL

Updated: 6:46 AM CDT

Temperature: 37.1 °F Dew Point: 31 °F Humidity: 79% Wind: NE at 1.0 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 6:56 AM CDT

Temperature: 37.2 °F Dew Point: 32 °F Humidity: 83% Wind: NE at 3.0 mph Pressure: 30.42 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 5:30 AM CDT

Temperature: 34 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: WB9NJJ, Rochelle, IL

Updated: 6:56 AM CDT

Temperature: 34.2 °F Dew Point: 16 °F Humidity: 47% Wind: North at 1.6 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Thornwood, South Elgin, IL

Updated: 6:55 AM CDT

Temperature: 35.6 °F Dew Point: 30 °F Humidity: 80% Wind: NNE at 2.7 mph Pressure: 30.28 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Plano, Plano, IL

Updated: 6:51 AM CDT

Temperature: 37.7 °F Dew Point: 31 °F Humidity: 78% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 38 °F Graphs

Location: Creek Side, Elgin, IL

Updated: 6:56 AM CDT

Temperature: 37.3 °F Dew Point: 31 °F Humidity: 78% Wind: NE at 6.9 mph Pressure: 29.44 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: West Batavia, Batavia, IL

Updated: 6:51 AM CDT

Temperature: 36.9 °F Dew Point: 32 °F Humidity: 81% Wind: East at 9.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Dover Ridge, Geneva, IL

Updated: 6:56 AM CDT

Temperature: 37.4 °F Dew Point: 32 °F Humidity: 79% Wind: NNE at 3.5 mph Pressure: 30.35 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

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

Updated: 6:49 AM CDT

Temperature: 35.8 °F Dew Point: 28 °F Humidity: 73% Wind: ENE at 7.2 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Gilberts, IL, Gilberts, IL

Updated: 6:56 AM CDT

Temperature: 35.6 °F Dew Point: 29 °F Humidity: 76% Wind: NE at 6.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Belvidere, Belvidere, IL

Updated: 6:46 AM CDT

Temperature: 35.4 °F Dew Point: 29 °F Humidity: 77% Wind: ENE at 6.8 mph Pressure: 30.13 in Hourly Precipitation: - Windchill: 30 °F Graphs

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

Updated: 6:30 AM CDT

Temperature: 34 °F Dew Point: 29 °F Humidity: 82% Wind: East at 4 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 30 °F Graphs

Location: Hunt Club, St. Charles, IL

Updated: 6:56 AM CDT

Temperature: 40.6 °F Dew Point: 35 °F Humidity: 79% Wind: ENE at 1.8 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: 41 °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 
627 am CDT Sat Apr 19 2014 


Discussion... 
314 am CDT 


Main forecast challenges/concerns are with a warming trend today 
through early next week with shower chances increasing late Sunday 
night into Monday...and with a slight chance of thunderstorms for 
the southern County Warning Area Monday afternoon/early evening. 


Upper level ridging ongoing across the region this morning as a 
fairly vigorous vorticity maximum quickly pushes east across the northern 
Continental U.S./Southern Canada...and with a large upper level trough 
pushing through the southwest Continental U.S.. at the surface...large high 
pressure spanning from Canada south through the central Great 
Lakes and middle Mississippi Valley southward to the southern Gulf 
states...while a trough of low pressure is situated over the 
northern plains. With this high overhead...a quiet but cool 
morning across the County Warning Area with temperatures currently in the 30s with 
generally clear skies in place outside of some few/scattered high level 
cirrus. With some ongoing weak warm air advection expected to continue do expect 
temperatures to fall 1-2 more degrees in some spots but with a trend more 
towards steady temperatures over the next several more likely. Latest 
satellite imagery depicting a substantial amount of middle/high level 
cloud cover over the central Continental U.S. Streaming out ahead of the 
previously mentioned middle/upper level features. Although as has 
been the trend...would anticipate this moisture to diminish or at 
least thin as it drifts east/southeast across the upper level 
ridge and would expect the clear skies to persist this morning 
making way for sunshine today across the County Warning Area. Continued warming as 
well as a return to more southerly flow as surface ridge departs 
to the east...do expect temperatures to rise into the 60s and even 70s in 
some locations outside of the cooler areas near the lake as 
onshore flow will be present once again. High confidence with lake 
cooling for the Illinois side but lower confidence on the Indiana 
side. Winds will turn more east/southeast synoptically but with 
lighter flow still in place...could easily see areas near gyy turn 
back more northeast...especially before 925mb flow ramps up later 
this afternoon. 


Guidance in good agreement with taking the vorticity maximum and attendant 
surface trough currently northwest of the region north into Canada 
today into tonight. As this occurs...expect associated baroclinic 
zone to stall northwest of the County Warning Area tonight into Sunday morning 
while upper level trough across the southwest Continental U.S. Slowly lifts 
to the northeast towards the Central Plains. What this means for 
the County Warning Area is continued dry conditions as any shower/thunderstorm 
development stays well west/northwest of the County Warning Area...with a rather 
mild day in store on Sunday. The bulk of the cloud cover should 
likewise stay to the northwest and with thermal axis inching 
towards the County Warning Area...expect temperatures to rise to the middle and upper 70s 
including areas near the lake. 


Guidance begins to diverge with regards to the evolution of the 
approaching upper level trough Sunday night into Monday as well as 
another vorticity maximum dropping southeast out of Canada during this 
time. Likely scenario is for any precipitation to remain northwest of the 
County Warning Area for most of Sunday night...but did include slight chance probability of precipitation 
for showers after midnight to account for a possibility for these 
showers to drift southeast. Nonetheless...precipitation chances will 
increase throughout the day Monday as upper level systems shift 
east through the middle and upper Mississippi valleys. This will help 
steer developing surface trough and frontal boundary east towards 
the County Warning Area with showers likely for the entire County Warning Area Monday afternoon. 
Confidence is low with regards to the amount of moisture return 
out ahead of this system Monday...but it does appear as if a 
narrow ribbon of higher dewpoints does try to advect north across 
the southern County Warning Area. Instability axis likewise doing the same during 
this time and so have included a slight chance for thunder mainly 
for the southern half of the County Warning Area during this time. Expect showers 
to persist into the evening with some possibility for thunder at 
least into a part of the evening...before colder/drier air really 
works its way south across the region and precipitation shield exits by 
early Tuesday. 


Rodriguez 


&& 


Aviation... 


//Ord and mdw concerns...updated 12z... 


* none. 


Ratzer 


//discussion...updated 12z... 


Surface high pressure ridge over area early will move east today. 
Winds gradually veering from east-northeast this morning to east- 
southeast this afternoon. Likely will develop lake breeze push 
within synoptic southeast flow...potentially with more easterly 
wind component...though low confidence in fine details of how that 
will evolve. Have played Ord/mdw tafs to maintain a representative 
120-ish direction through the afternoon. Gyy more likely to have a 
period of northeast wind off the lake into the afternoon. Winds 
generally around 10 knots... with some gusts mainly farther west for 
krfd. Wind veers south tonight and Sunday. Otherwise...VFR 
conditions through period with only some few-scattered high cloud. 


Ratzer 




//Ord and mdw confidence...updated 12z... 


* low confidence in exact wind direction this afternoon... but 
high confidence it will be east-southeast. 


* High confidence all other forecast elements. 


Ratzer 


//outlook for Ord/mdw for 00z Monday-12z Saturday...updated 12z... 


Sunday night...VFR. Slight chance rain showers late. 


Monday...rain showers likely. Brief MVFR possible. 


Tuesday and Wednesday...VFR. 


Thursday...chance shra/tsra. MVFR possible. 


Friday...slight chance rain showers. Mainly VFR. 


Ratzer 


&& 


Marine... 
251 am CDT 


High pressure ridge over the western lakes early this morning will 
drift off to the east today...while a pair of surface low pressure 
centers over the northern plains and Canadian prairies consolidate 
into a single low north of the border. South-southeast winds will 
gradually increase today into tonight as the low moves east into 
Ontario and the gradient tightens in advance of a cold front which 
will trail this low into the central and Southern Plains. Southerly 
winds may approach 30 knots on the northern portion of the lake tonight 
as the low passes by to the north. The gradient will then weaken 
Sunday as the low continues to track east towards James Bay... and 
the front sags southeast across the lake. The cold front will not 
complete its transit of the lake at that time however...as another 
weaker area of low pressure develops over the Southern Plains Sunday 
and lifts northeast along the front into the Great Lakes region on 
Monday. This low will pull the cold front southeast of the lake by 
Monday evening. Northerly winds will then increase as the gradient 
tightens ahead of an area of high pressure building east across the 
plains and upper Midwest into Tuesday. The high pressure ridge will 
move across the western lakes Wednesday morning...while another deep 
low takes shape to the west across the northern High Plains. Strong 
south winds are anticipated again Thursday as this low also moves 
east. 


Ratzer 


&& 


Lot watches/warnings/advisories... 
Illinois...none. 
In...none. 
Lm...none. 
&& 


$$ 


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