Dekalb, Illinois Weather Conditions

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Current Conditions

  • 60°
  • Clear
  • Wind: NNE 12 mph
  • Humidity: 83%
  • Visibility: 10.0 miles
  • Dew Point: 55°
  • Pressure: 30.13 in. 0

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Next 12 Hours

7  am
10  am
1  pm
4  pm
7  pm
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
61°
68°
72°
70°
68°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 72 °
  • Low: 52 °
  • Partly Cloudy
  • Thursday
  • Clear
  • High: 75 °
  • Low: 52 °
  • Clear
  • Friday
  • Chance of a Thunderstorm
  • High: 73 °
  • Low: 59 °
  • Chance of a Thunderstorm
  • Saturday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 63 °
  • Chance of T-Storms
  • Sunday
  • Partly Cloudy
  • High: 81 °
  • Low: 55 °
  • Partly Cloudy

Forecast for Dekalb, Illinois

Updated: 4:00 AM CDT on July 23, 2014

  • Wednesday

    Clear in the morning, then partly cloudy. High of 72F. Winds from the NNE at 10 to 15 mph.

  • Wednesday Night

    Partly cloudy in the evening, then clear. Low of 52F. Winds from the NE at 5 to 10 mph.

  • Thursday

    Clear. High of 75F. Winds from the NE at 5 to 10 mph.

  • Thursday Night

    Clear in the evening, then partly cloudy. Low of 52F. Winds less than 5 mph.

  • Friday

    Overcast with a chance of a thunderstorm and a chance of rain in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 73F. Winds from the South at 5 to 10 mph. Chance of rain 20%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm and rain in the evening, then overcast with a chance of a thunderstorm and rain. Fog overnight. Low of 59F. Winds from the SSE at 5 to 15 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Saturday

    Partly cloudy with a chance of a thunderstorm and rain. High of 82F. Winds from the SW at 5 to 15 mph shifting to the WNW in the afternoon. Chance of rain 40%.

  • Saturday Night

    Partly cloudy. Fog overnight. Low of 63F. Winds from the WSW at 5 to 10 mph.

  • Sunday

    Partly cloudy. Fog early. High of 81F. Winds from the WNW at 10 to 15 mph.

  • Sunday Night

    Partly cloudy with a chance of rain. Fog overnight. Low of 55F. Winds from the NNW at 5 to 15 mph. Chance of rain 20%.

  • Monday

    Partly cloudy. High of 72F. Winds from the NNW at 5 to 10 mph.

  • Monday Night

    Clear. Low of 54F. Winds less than 5 mph.

  • Tuesday

    Clear. High of 72F. Winds from the WNW at 5 to 10 mph.

  • Tuesday Night

    Clear. Fog overnight. Low of 55F. Winds from the WSW at 5 to 10 mph.

  • Wednesday

    Mostly cloudy with a chance of rain. High of 73F. Winds from the SW at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 50F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 73F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 57F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Clear with a chance of a thunderstorm. High of 77F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 57F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday

    Clear. High of 75F. Winds less than 5 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 57F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 6:53 AM CDT

Temperature: 62.1 °F Dew Point: 58 °F Humidity: 86% Wind: NW at 1.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Northern Illinois University, DeKalb, IL

Updated: 6:53 AM CDT

Temperature: 62.3 °F Dew Point: 57 °F Humidity: 82% Wind: NNE at 5.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 6:49 AM CDT

Temperature: 61.6 °F Dew Point: 57 °F Humidity: 86% Wind: NE at 5.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: DeKalb, IL

Updated: 6:47 AM CDT

Temperature: 61.7 °F Dew Point: 58 °F Humidity: 87% Wind: North at 13.0 mph Pressure: 30.05 in Hourly Precipitation: - Graphs

Location: MesoWest MALTA1 IL US UPR, Malta, IL

Updated: 4:50 AM CDT

Temperature: 62 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 6:53 AM CDT

Temperature: 63.7 °F Dew Point: 58 °F Humidity: 82% Wind: NE at 4.9 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Out On the Farm, Clare, IL

Updated: 6:43 AM CDT

Temperature: 60.6 °F Dew Point: 58 °F Humidity: 92% Wind: NNE at 4.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 6:53 AM CDT

Temperature: 61.3 °F Dew Point: 58 °F Humidity: 89% Wind: NE at 4.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest ELBRN1 IL US UPR, Elburn, IL

Updated: 5:25 AM CDT

Temperature: 64 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Genoa Road, Genoa, IL

Updated: 6:47 AM CDT

Temperature: 60.6 °F Dew Point: 58 °F Humidity: 92% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: Columbine Square, Elburn, IL

Updated: 6:48 AM CDT

Temperature: 62.5 °F Dew Point: 58 °F Humidity: 85% Wind: North at 3.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 6:50 AM CDT

Temperature: 63.4 °F Dew Point: 58 °F Humidity: 84% Wind: NNE at 5.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: Cheval-De-Selle, Elburn, IL

Updated: 6:52 AM CDT

Temperature: 59.5 °F Dew Point: 56 °F Humidity: 88% Wind: SSW at 2.7 mph Pressure: 30.03 in Hourly Precipitation: - Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 6:53 AM CDT

Temperature: 61.1 °F Dew Point: 57 °F Humidity: 85% Wind: NNE at 10.0 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 6:53 AM CDT

Temperature: 61.9 °F Dew Point: 58 °F Humidity: 86% Wind: NNE at 4.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Graphs

Location: OakGrove, Hampshire, IL

Updated: 6:50 AM CDT

Temperature: 63.5 °F Dew Point: 56 °F Humidity: 78% Wind: NE at 3.7 mph Pressure: 30.01 in Hourly Precipitation: - Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 6:53 AM CDT

Temperature: 62.3 °F Dew Point: 59 °F Humidity: 89% Wind: NNW at 1.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Graphs

Location: Windswept Acres, Marengo, IL

Updated: 6:50 AM CDT

Temperature: 61.0 °F Dew Point: 58 °F Humidity: 91% Wind: NNE at 3.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

Location: Hidden Farms Estates, Marengo, IL

Updated: 6:51 AM CDT

Temperature: 58.7 °F Dew Point: 56 °F Humidity: 89% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Graphs

Location: Mill Creek, Geneva, IL

Updated: 6:49 AM CDT

Temperature: 64.0 °F Dew Point: 57 °F Humidity: 79% Wind: NE at 8.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 6:53 AM CDT

Temperature: 63.3 °F Dew Point: 58 °F Humidity: 83% Wind: North at 1.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 5:55 AM CDT

Temperature: 62 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: WB9NJJ, Rochelle, IL

Updated: 6:53 AM CDT

Temperature: 64.0 °F Dew Point: 46 °F Humidity: 52% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Graphs

Location: Thornwood, South Elgin, IL

Updated: 6:40 AM CDT

Temperature: 62.8 °F Dew Point: 56 °F Humidity: 80% Wind: NNE at 3.7 mph Pressure: 29.99 in Hourly Precipitation: - Graphs

Location: Plano, Plano, IL

Updated: 6:43 AM CDT

Temperature: 64.2 °F Dew Point: 59 °F Humidity: 82% Wind: Calm Pressure: 30.04 in Hourly Precipitation: 0.00 in Graphs

Location: Creek Side, Elgin, IL

Updated: 6:53 AM CDT

Temperature: 64.1 °F Dew Point: 58 °F Humidity: 82% Wind: ESE at 3.1 mph Pressure: 29.21 in Hourly Precipitation: 0.00 in Graphs

Location: Waterford Oaks, North Aurora, IL

Updated: 6:53 AM CDT

Temperature: 64.7 °F Dew Point: 58 °F Humidity: 80% Wind: NNE at 5.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Graphs

Location: West Batavia, Batavia, IL

Updated: 6:51 AM CDT

Temperature: 63.6 °F Dew Point: 58 °F Humidity: 81% Wind: NE at 8.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Graphs

Location: Dover Ridge, Geneva, IL

Updated: 6:53 AM CDT

Temperature: 63.2 °F Dew Point: 57 °F Humidity: 81% Wind: ENE at 6.9 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Graphs

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

Updated: 6:50 AM CDT

Temperature: 63.9 °F Dew Point: 60 °F Humidity: 86% Wind: NW at 4.5 mph Pressure: 30.10 in Hourly Precipitation: 0.00 in Graphs

Location: Gilberts, IL, Gilberts, IL

Updated: 6:53 AM CDT

Temperature: 63.1 °F Dew Point: 56 °F Humidity: 77% Wind: NE at 7.6 mph Pressure: 30.32 in Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Chicago/Romeoville Illinois 
625 am CDT Wednesday Jul 23 2014 


Discussion... 
248 am CDT 


Today through tonight... 
early this morning infrared imagery depicts a channel of cooler clouds 
stretching from Ford County northeast through Northwest Indiana. 
Radar continues to show a ragged line of convection under these 
clouds...which should continue to sag southeast as the frontal 
boundary pushes south across the forecast area this morning. 
Instability along and south of the boundary remains...with most of 
the convection being rooted in the middle-levels as lapse rates continue 
to remain rather steep. Fortunately though the intensity of the 
storms should continue to remain sub-severe and perhaps another Special Weather Statement 
will be needed before activity pushes south of the forecast area. 


Otherwise high pressure will build into the region today...with 
winds shifting northerly to slightly northeasterly. This will 
provide an inverse airmass from the past 48 hours...to a much drier 
and sub-seasonal temperatures. The pressure gradient will remain tight on 
the Lee-side of the surface ridge...resulting in a stronger marine 
influence on temperatures along the immediate shoreline today. Thus it is 
likely that afternoon highs may struggle to touch 70...meanwhile inland 
areas will be generally in the low/middle 70s. 


Tonight high pressure will be overhead with just a light northerly 
flow and perhaps winds will become calm for the northern County warning forecast area. Temperatures 
should easily radiate into the lower 50s. A few locations could dip 
into the upper 40s just before sunrise Thursday...mainly across the Fox 
Valley. 


Thursday... 
anti-cyclonic flow will continue to dominate the region through 
Thursday...with minimal cloud cover and temperatures generally in the middle 70s. 
The exception will be locations adjacent to Lake Michigan where a 
lake breeze/onshore flow will keep temperatures around 70. 


Middle-level trough axis begins to pivot east Thursday night...with the surface 
ridge drifting east and allowing winds to slowly turn southerly 
ahead of the next wave set to arrive Friday. 


Confidence...high. 


Friday through Tuesday... 
middle-level ridge centered over the Southern Plains will begin to 
flatten along the northern fringes...allowing for an ease of systems 
to traverse the northern tier states east across the Great Lakes 
region. Guidance has continued to point towards a weak surface wave 
sliding east from the Central Plains Friday...arriving over the 
forecast area with some enhancement to the precipitation output due to warm 
air advection and ascent to parcels. Thus have nudged probability of precipitation up 
slightly during the day Friday...with the focus likely midday through 
early evening. 


A middle-level vorticity prognosticated to be over the Canadian prairies Friday...will 
slowly move east Friday night before sliding southeast across the Great 
Lakes region later in the weekend. Ensembles continue to point 
towards another pattern adjustment over the second half of the 
weekend into early next week...as the North Atlantic ridge returns 
and prevents the aforementioned upper Midwest shortwave from 
departing. In addition a high amplitude ridge continues to be 
prognosticated across the western Continental U.S....keeping the middle-level trough over 
Hudson Bay/Great Lakes through Mon/Tue. 


The overall theme continues to be a brief return to seasonal temperatures 
for the weekend in the low 80s...however once the trough returns to 
the Great Lakes region so will the unseasonably cooler air. Temperatures by 
early next week will mainly be in the middle/upper 70s. 


Confidence...high. 


Beachler 


&& 


Aviation... 


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


* gusty north-northeast/NE winds through this evening. 


Bmd 


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


A cold front has pushed across the region with thunderstorms now 
primarily in central Indiana and downstate Illinois with high 
pressure building in from the northwest today. A moderate pressure 
gradient remains in place with efficient mixing today resulting 
in gusty winds out of the NNE/NE. Winds likely will remain fairly 
steady through the day then begin to taper this evening and 
tonight. VFR conditions will prevail through the period. 


Bmd 




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


* high in wind direction...medium in wind gusts speeds. 
* High confidence in VFR conditions. 


Bmd 


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


Thursday night...VFR. 
Friday through Sunday...periodic chances for thunderstorms. 
Monday through Tuesday...slight chances for showers. 


Bmd 


&& 


Marine... 
316 am CDT 


Winds and waves have already increased across Lake Michigan...now 
blowing out of the north at around 30 knots especially over the south 
half of the lake where a few gale force gusts are possible behind 
a departing cold front. A Small Craft Advisory is in effect today 
for the Indiana and Illinois nearshore waters due to the elevated 
winds and waves. High pressure currently over the Canadian 
prairies will begin to build across Lake Michigan tonight allowing 
winds to subside overnight into Thursday. 


Bmd 


&& 


Lot watches/warnings/advisories... 
Illinois...beach hazards statement...ilz006-ilz014 until 10 am Thursday. 


In...beach hazards statement...inz001-inz002 until 10 am Thursday. 


Lm...Small Craft Advisory...nearshore waters 
until 10 am Thursday. 


&& 


$$ 


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