Dekalb, Illinois Weather Conditions

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Current Conditions

  • 66°
  • Clear
  • Wind: South 5 mph
  • Humidity: 83%
  • Visibility: 10.0 miles
  • Dew Point: 61°
  • Pressure: 30.16 in. 0

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Next 12 Hours

12  pm
3  pm
6  pm
9  pm
12  am
Clear
Clear
Partly Cloudy
Partly Cloudy
Overcast
Overcast
Overcast
Overcast
Chance of a Thunderstorm
Chance of T-storms
66°
70°
72°
66°
66°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Overcast
  • High: 76 °
  • Low: 62 °
  • Overcast
  • Saturday
  • Thunderstorm
  • High: 74 °
  • Low: 60 °
  • T-Storms
  • Sunday
  • Partly Cloudy
  • High: 81 °
  • Low: 58 °
  • Partly Cloudy
  • Monday
  • Clear
  • High: 84 °
  • Low: 61 °
  • Clear
  • Tuesday
  • Clear
  • High: 87 °
  • Low: 65 °
  • Clear

Forecast for Dekalb, Illinois

Updated: 11:43 am CDT on August 28, 2015

  • This Afternoon

    Cloudy with a 30 percent chance of showers. Highs in the lower 70s. South winds around 10 mph.

  • Tonight

    Chance of showers and a slight chance of thunderstorms early in the evening...then showers likely and a slight chance of thunderstorms in the late evening and overnight. Lows in the lower 60s. Southeast winds 10 to 15 mph. Chance of precipitation 60 percent.

  • Saturday

    Mostly cloudy with chance of showers and a slight chance of thunderstorms. Highs in the mid 70s. South winds 5 to 10 mph. Chance of precipitation 50 percent.

  • Saturday Night

    Partly cloudy with a 20 percent chance of showers. Lows in the lower 60s. Northeast winds around 5 mph.

  • Sunday

    Partly cloudy. Highs in the upper 70s. East winds around 5 mph.

  • Sunday Night

    Mostly clear. Lows in the lower 60s.

  • Monday

    Partly cloudy. Highs in the lower 80s.

  • Monday Night

    Mostly clear. Lows in the mid 60s.

  • Tuesday through Thursday

    Mostly clear. Highs in the upper 80s. Lows in the mid 60s.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 12:01 PM CDT

Temperature: 67.1 °F Dew Point: 62 °F Humidity: 85% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Northern Illinois University - Davis Hall, DeKalb, IL

Updated: 12:01 PM CDT

Temperature: 67.9 °F Dew Point: 62 °F Humidity: 81% Wind: SSW at 3.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Northern Illinois University - Barsema Alumni and Visitors Center, DeKalb, IL

Updated: 12:01 PM CDT

Temperature: 67.3 °F Dew Point: 62 °F Humidity: 82% Wind: SW at 3.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 12:00 PM CDT

Temperature: 68.4 °F Dew Point: 62 °F Humidity: 81% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: River Mist, DeKalb, IL

Updated: 12:01 PM CDT

Temperature: 69.6 °F Dew Point: 62 °F Humidity: 77% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: DeKalb, IL

Updated: 11:52 AM CDT

Temperature: 67.2 °F Dew Point: 63 °F Humidity: 86% Wind: SSW at 3.0 mph Pressure: 30.10 in Hourly Precipitation: - Heat Index: - Graphs

Location: Sycamore, IL

Updated: 12:01 PM CDT

Temperature: 66.2 °F Dew Point: 62 °F Humidity: 85% Wind: SE at 2.9 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Heron Creek, Sycamore, IL

Updated: 12:01 PM CDT

Temperature: 67.8 °F Dew Point: 62 °F Humidity: 82% Wind: Calm Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Out On the Farm, Clare, IL

Updated: 12:00 PM CDT

Temperature: 67.5 °F Dew Point: 63 °F Humidity: 86% Wind: SE at 3.0 mph Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: South Grove, Kirkland, IL

Updated: 11:51 AM CDT

Temperature: 67.6 °F Dew Point: 63 °F Humidity: 86% Wind: SSW at 3.2 mph Pressure: 30.11 in Hourly Precipitation: - Heat Index: - Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 12:01 PM CDT

Temperature: 66.4 °F Dew Point: 63 °F Humidity: 88% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Highway 23, Waterman, IL

Updated: 11:55 AM CDT

Temperature: 68.4 °F Dew Point: 62 °F Humidity: 79% Wind: North at - Pressure: 30.24 in Hourly Precipitation: - Heat Index: - Graphs

Location: Country Meadows, Kirkland, IL

Updated: 11:54 AM CDT

Temperature: 67.6 °F Dew Point: 62 °F Humidity: 82% Wind: SE at 2.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Burlington Prairie Forest Preserve, Sycamore, IL

Updated: 11:53 AM CDT

Temperature: 67.6 °F Dew Point: 63 °F Humidity: 86% Wind: Calm Pressure: 29.97 in Hourly Precipitation: - Heat Index: - Graphs

Location: South Sycamore Street, Hinckley, IL

Updated: 11:55 AM CDT

Temperature: 67.6 °F Dew Point: 63 °F Humidity: 84% Wind: North at - Pressure: 30.00 in Hourly Precipitation: - Heat Index: - Graphs

Location: Genoa Road, Genoa, IL

Updated: 11:47 AM CDT

Temperature: 67.2 °F Dew Point: 63 °F Humidity: 86% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET, Elburn, IL

Updated: 11:39 AM CDT

Temperature: 68 °F Dew Point: 63 °F Humidity: 85% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET, Campton Hills, IL

Updated: 11:34 AM CDT

Temperature: 67 °F Dew Point: 62 °F Humidity: 85% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Columbine Square, Elburn, IL

Updated: 11:54 AM CDT

Temperature: 67.9 °F Dew Point: 63 °F Humidity: 84% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Prairie Valley North, Elburn, IL

Updated: 12:01 PM CDT

Temperature: 68.9 °F Dew Point: 61 °F Humidity: 76% Wind: SW at 2.7 mph Pressure: 29.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 12:00 PM CDT

Temperature: 68.1 °F Dew Point: 63 °F Humidity: 85% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Cheval de Selle, Elburn, IL

Updated: 11:52 AM CDT

Temperature: 67.8 °F Dew Point: 63 °F Humidity: 85% Wind: South at 4.2 mph Pressure: 30.13 in Hourly Precipitation: - Heat Index: - Graphs

Location: Seaton Street, Elburn, IL

Updated: 11:55 AM CDT

Temperature: 70.3 °F Dew Point: 58 °F Humidity: 64% Wind: North at - Pressure: 30.18 in Hourly Precipitation: - Heat Index: 75 °F Graphs

Location: Griffith Avenue, Elburn, IL

Updated: 11:55 AM CDT

Temperature: 67.8 °F Dew Point: 63 °F Humidity: 85% Wind: North at - Pressure: 29.36 in Hourly Precipitation: - Heat Index: - Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 12:01 PM CDT

Temperature: 68.9 °F Dew Point: 62 °F Humidity: 80% Wind: South at 4.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: K9GPC, Rochelle, IL

Updated: 12:01 PM CDT

Temperature: 69.1 °F Dew Point: 61 °F Humidity: 76% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

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

Updated: 12:01 PM CDT

Temperature: 68.3 °F Dew Point: 64 °F Humidity: 85% Wind: Calm Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Lindenwood, Lindenwood, IL

Updated: 12:01 PM CDT

Temperature: 68.7 °F Dew Point: 62 °F Humidity: 80% Wind: SE at 2.5 mph Pressure: 29.28 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: OakGrove, Hampshire, IL

Updated: 11:47 AM CDT

Temperature: 70.3 °F Dew Point: 63 °F Humidity: 77% Wind: Calm Pressure: 30.08 in Hourly Precipitation: - Heat Index: 72 °F Graphs

Location: Geneva, IL

Updated: 11:59 AM CDT

Temperature: 68.6 °F Dew Point: 62 °F Humidity: 79% Wind: SW at 3.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 12:01 PM CDT

Temperature: 69.1 °F Dew Point: 63 °F Humidity: 80% Wind: Calm Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET, Wasco, IL

Updated: 11:28 AM CDT

Temperature: 66 °F Dew Point: 60 °F Humidity: 81% Wind: South at 1 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Windswept Acres, Marengo, IL

Updated: 12:00 PM CDT

Temperature: 68.2 °F Dew Point: 63 °F Humidity: 83% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Saint Charles Burr Road, Saint Charles, IL

Updated: 11:53 AM CDT

Temperature: 71.4 °F Dew Point: 62 °F Humidity: 72% Wind: SSW at 2.7 mph Pressure: 29.86 in Hourly Precipitation: - Heat Index: 74 °F Graphs

Location: Mill Creek, Geneva, IL

Updated: 12:00 PM CDT

Temperature: 67.8 °F Dew Point: 61 °F Humidity: 79% Wind: SSW at 1.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Big Timber Road, Hampshire, IL

Updated: 11:55 AM CDT

Temperature: 69.8 °F Dew Point: 62 °F Humidity: 76% Wind: North at - Pressure: 30.24 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Mill Creek (Blackberry Way), Geneva, IL

Updated: 12:01 PM CDT

Temperature: 68.4 °F Dew Point: 63 °F Humidity: 82% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Chicago/Romeoville Illinois 
1102 am CDT Friday Aug 28 2015 


Short term... 
344 am CDT 


Through Saturday night... 


Main forecast concerns/challenges are with precipitation trends later 
today into tonight...and into the weekend. 


Latest satellite imagery depicting upper level with several vorticity 
lobes rounding the base...progressing east through the northern 
plains early this morning. Although associated precipitation remains well 
west of the County Warning Area at this time...fairly dense middle/high level cloud 
cover already stretching east into northern Illinois. Radar 
imagery showing some weak returns at this time...however...this is 
picking up these clouds with any precipitation likely not making it to 
the surface. Have maintained a dry forecast early this morning 
through midday for the entire County Warning Area as strongest forcing with the 
first wave lifting east/northeast staying to the west/northwest. 
Some guidance is trying to hint at some stray light showers over 
portions of northern Illinois this morning but with rather dry low 
levels in place this morning...per 00z observed soundings and 
latest forecast soundings...think any forcing owing to weak warm air advection 
will not be able to overcome this drier air. Do bring slight 
chance to chance probability of precipitation over far northern Illinois by middle to late 
afternoon today as this middle/upper level trough and associated 
energy move closer to the County Warning Area...but once again feel that the best 
forcing will still be to the north and northwest. Have maintained 
showers and did not include thunder...with instability staying to 
the west of the County Warning Area. High temperatures will be limited today due 
to the middle/high clouds in the 70s...and did lower them slightly to 
the low/middle 70s across northern Illinois where more dense clouds 
and precipitation will likely be located. 


Higher chances for precipitation will arrive later this evening and 
especially overnight tonight for most of northern Illinois...as 
shortwave energy on the backside of this trough and attendant 
surface reflection will push into northern Illinois. Did maintain 
slight chance for thunder with the likely/Cat probability of precipitation over northern 
Illinois tonight...despite lacking instability. Strengthening low level jet 
and stronger forcing could offset this lacking instability and 
allow thunder...similar to what is occurring now over Iowa. East 
central Illinois and Northwest Indiana wont observe the higher 
chances for showers/thunder until Saturday morning and Saturday as 
this trough pushes through. Confidence with overall precipitation trends 
on Saturday and Saturday night does lower with guidance varying to 
the extent and location of best forcing. Did maintain high chance 
probability of precipitation for showers across much of the County Warning Area Saturday and then took 
these chance probability of precipitation eastward through time during Saturday night. 
Instability will try to increase on Saturday...but still think it 
wont be high enough to warrant any wording other than slight 
chance. 


Rodriguez 


&& 


Long term... 
344 am CDT 


Sunday through Thursday... 


End of the weekend into the start of next week will see this 
middle/upper trough slowly exiting to the east...with clouds and 
precipitation chances likewise exiting during the day Sunday. Guidance 
varies to the evolution of this exiting system but likely scenario 
for our area will be for upper level ridging with weaker flow 
aloft. Conditions will likely be on the dry side through early 
next week...outside of some possible afternoon thunderstorms on 
Tuesday due to increasing moisture/instability...while a warming 
trend continues. 


Rodriguez 


&& 


Aviation... 


//Ord and mdw concerns...updated 16z... 


* wind shift to easterly likely late this afternoon 
* chance of rain showers/slight chance of ts tonight into Sat morning 


Izzi/kb 


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


A slow moving storm system over Iowa will weaken as it moves 
closer to the region tonight into Saturday. Area of showers and 
isolated thunderstorms and rain over Iowa will continue to inch eastward but progress 
should be slow and leading edge could erode some in drier air mass 
over our region with focus initially likely more into Wisconsin. 
With time the showers and perhaps a ts or two will sag south into 
north Illinois tonight (mainly late) into Sat morning. Some guidance 
suggests precipitation will be decreasing in coverage/intensity by this 
time...lending to some uncertainties in how to best convey threat 
in tafs. Other than precipitation...which could possibly result in some 
MVFR ceilings by Sat morning...only other concern will be winds this 
afternoon and evening. Initially light southerly winds will likely 
shift to easterly late this afternoon...possibly enhanced by lake 
in chgo terminals. Could see a brief period of 10-12kt winds but 
suspect winds will largely end up just below 10kt from easterly 
direction through tonight. 


Izzi 


//Ord and mdw confidence...updated 16z... 


* high confidence in wind shift to east later this 
afternoon...low-medium confidence in precise speeds and timing 
* medium confidence in precipitation chances/timing 
* high confidence in remaining forecast elements 


Izzi/kb 


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


Saturday night...slight chance of thunderstorms and rain...otherwise VFR. 


Sunday...VFR. Northeast winds. 


Monday through Thursday...VFR. Southerly winds...possible 
afternoon wind shifts to easterly with lake breezes each 
afternoon. 


Izzi 


&& 


Marine... 
157 am CDT 


Fairly typical Summer pattern likely to persist through the 
upcoming week with generally no significant winds/waves 
anticipated. Weak surface low over the corn belt will track slowly 
east into northern Illinois/southern Wisconsin through Saturday 
before dissipating. The main result will be a backing of winds to 
easterly over southern portions of the lake later today into this 
evening before veering southerly again late tonight and freshening 
up just a bit...but likely less than 20kt. 


Izzi 


&& 


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


$$ 


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