Dekalb, Illinois Weather Conditions

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Current Conditions

  • 62°
  • Overcast
  • Wind: North 10 mph
  • Humidity: 70%
  • Visibility: 10.0 miles
  • Dew Point: 53°
  • Pressure: 29.97 in. -

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Next 12 Hours

1  am
4  am
7  am
10  am
1  pm
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
63°
57°
54°
61°
68°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Partly Cloudy
  • High: 70 °
  • Low: 52 °
  • Partly Cloudy
  • Tuesday
  • Chance of a Thunderstorm
  • High: 75 °
  • Low: 57 °
  • Chance of a Thunderstorm
  • Wednesday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 48 °
  • Chance of a Thunderstorm
  • Thursday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 54 °
  • Chance of T-Storms
  • Friday
  • Chance of a Thunderstorm
  • High: 73 °
  • Low: 57 °
  • Chance of T-Storms

Forecast for Dekalb, Illinois

Updated: 10:00 PM CDT on July 27, 2014

  • Monday

    Clear in the morning, then partly cloudy. High of 70F. Breezy. Winds from the North at 15 to 20 mph.

  • Monday Night

    Clear in the evening, then partly cloudy. Low of 52F. Winds from the WNW at 5 to 10 mph.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 75F. Winds from the WNW at 10 to 15 mph. Chance of rain 20%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 57F. Winds from the West at 5 to 10 mph. Chance of rain 20%.

  • Wednesday

    Partly cloudy with a chance of rain in the morning, then clear with a chance of a thunderstorm and a chance of rain. High of 77F. Winds from the WNW at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy with a chance of rain. Fog overnight. Low of 48F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm and rain. High of 77F. Winds less than 5 mph. Chance of rain 50%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm and rain. Low of 54F. Winds less than 5 mph. Chance of rain 50%.

  • Friday

    Partly cloudy with a chance of a thunderstorm and rain. High of 73F. Winds less than 5 mph. Chance of rain 50%.

  • Friday Night

    Mostly cloudy with a chance of a thunderstorm. Low of 57F. Winds less than 5 mph. Chance of rain 50%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 77F. Winds less than 5 mph. Chance of rain 70% with rainfall amounts near 0.3 in. possible.

  • Saturday Night

    Clear with a chance of a thunderstorm. Low of 48F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday

    Partly cloudy with a chance of a thunderstorm. High of 73F. Winds less than 5 mph. Chance of rain 20%.

  • Sunday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 57F. Winds from the West at 5 to 10 mph. Chance of rain 40%.

  • Monday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 70F. Winds from the WNW at 5 to 10 mph. Chance of rain 20%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 46F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 70F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday Night

    Clear. Fog overnight. Low of 48F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 70F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Fog overnight. Low of 50F. Winds less than 5 mph.

  • Thursday

    Clear. High of 72F. Winds less than 5 mph.

  • Thursday Night

    Clear. Fog overnight. Low of 50F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 1:12 AM CDT

Temperature: 63.7 °F Dew Point: 56 °F Humidity: 77% Wind: NW at 2.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Northern Illinois University, DeKalb, IL

Updated: 1:12 AM CDT

Temperature: 64.2 °F Dew Point: 57 °F Humidity: 77% Wind: North at 4.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 1:09 AM CDT

Temperature: 63.1 °F Dew Point: 56 °F Humidity: 77% Wind: North at 3.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: DeKalb, IL

Updated: 12:58 AM CDT

Temperature: 63.5 °F Dew Point: 56 °F Humidity: 77% Wind: North at 9.0 mph Pressure: 29.89 in Hourly Precipitation: - Windchill: - Graphs

Location: Sycamore, IL

Updated: 1:12 AM CDT

Temperature: 62.7 °F Dew Point: 55 °F Humidity: 75% Wind: NNE at 6.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest MALTA1 IL US UPR, Malta, IL

Updated: 11:40 PM CDT

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

Location: Heron Creek, Sycamore, IL

Updated: 1:12 AM CDT

Temperature: 62.4 °F Dew Point: 55 °F Humidity: 76% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 1:12 AM CDT

Temperature: 62.2 °F Dew Point: 55 °F Humidity: 78% Wind: NE at 6.9 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Out On the Farm, Clare, IL

Updated: 1:10 AM CDT

Temperature: 62.6 °F Dew Point: 57 °F Humidity: 83% Wind: NNE at 4.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 1:12 AM CDT

Temperature: 62.1 °F Dew Point: 56 °F Humidity: 81% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest ELBRN1 IL US UPR, Elburn, IL

Updated: 12:00 AM CDT

Temperature: 65 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Genoa Road, Genoa, IL

Updated: 1:11 AM CDT

Temperature: 62.7 °F Dew Point: 57 °F Humidity: 81% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Columbine Square, Elburn, IL

Updated: 1:00 AM CDT

Temperature: 63.0 °F Dew Point: 57 °F Humidity: 80% Wind: NE at 6.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 1:10 AM CDT

Temperature: 63.3 °F Dew Point: 57 °F Humidity: 79% Wind: NNE at 1.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Cheval-De-Selle, Elburn, IL

Updated: 12:53 AM CDT

Temperature: 60.6 °F Dew Point: 55 °F Humidity: 82% Wind: NW at 1.1 mph Pressure: 29.85 in Hourly Precipitation: - Windchill: - Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 1:12 AM CDT

Temperature: 61.4 °F Dew Point: 55 °F Humidity: 79% Wind: North at 2.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: K9GPC, Rochelle, IL

Updated: 1:12 AM CDT

Temperature: 64.0 °F Dew Point: 51 °F Humidity: 63% Wind: NNW at 2.7 mph Pressure: 29.21 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 1:12 AM CDT

Temperature: 62.6 °F Dew Point: 56 °F Humidity: 80% Wind: NE at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: OakGrove, Hampshire, IL

Updated: 1:12 AM CDT

Temperature: 59.7 °F Dew Point: 53 °F Humidity: 79% Wind: SSW at 4.7 mph Pressure: 29.85 in Hourly Precipitation: - Windchill: - Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 1:12 AM CDT

Temperature: 63.1 °F Dew Point: 57 °F Humidity: 81% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Windswept Acres, Marengo, IL

Updated: 1:05 AM CDT

Temperature: 61.2 °F Dew Point: 57 °F Humidity: 86% Wind: North at 2.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Hidden Farms Estates, Marengo, IL

Updated: 1:06 AM CDT

Temperature: 60.7 °F Dew Point: 55 °F Humidity: 81% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Mill Creek, Geneva, IL

Updated: 1:00 AM CDT

Temperature: 64.1 °F Dew Point: 59 °F Humidity: 83% Wind: WNW at 3.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 1:12 AM CDT

Temperature: 63.9 °F Dew Point: 58 °F Humidity: 80% Wind: NNE at 4.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 11:50 PM CDT

Temperature: 39 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 39 °F Graphs

Location: WB9NJJ, Rochelle, IL

Updated: 1:12 AM CDT

Temperature: 64.2 °F Dew Point: 46 °F Humidity: 51% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Thornwood, South Elgin, IL

Updated: 12:59 AM CDT

Temperature: 64.2 °F Dew Point: 56 °F Humidity: 76% Wind: NNE at 11.4 mph Pressure: 29.82 in Hourly Precipitation: - Windchill: - Graphs

Location: Plano, Plano, IL

Updated: 1:08 AM CDT

Temperature: 65.2 °F Dew Point: 60 °F Humidity: 84% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Creek Side, Elgin, IL

Updated: 1:12 AM CDT

Temperature: 63.5 °F Dew Point: 55 °F Humidity: 75% Wind: SSE at 1.8 mph Pressure: 29.05 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Waterford Oaks, North Aurora, IL

Updated: 1:12 AM CDT

Temperature: 64.9 °F Dew Point: 60 °F Humidity: 84% Wind: North at 1.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: West Batavia, Batavia, IL

Updated: 1:11 AM CDT

Temperature: 64.5 °F Dew Point: 60 °F Humidity: 84% Wind: NNW at 4.0 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Dover Ridge, Geneva, IL

Updated: 1:12 AM CDT

Temperature: 64.9 °F Dew Point: 57 °F Humidity: 76% Wind: NE at 5.8 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 1:09 AM CDT

Temperature: 65.5 °F Dew Point: 58 °F Humidity: 78% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Windchill: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Chicago/Romeoville Illinois 
1242 am CDT Monday Jul 28 2014 


Discussion... 
731 PM CDT 


Radar imagery continues to show widely scattered showers drifting 
south/southeast through the region and into primarily northern 
Illinois. The bulk of this activity has weakened as it moved into 
the County Warning Area with little to no thunder. As Stout vorticity lobe shifts 
east/southeast this evening...current surface trough to the north 
will weaken as it moves south with current coverage of shower 
activity lessening over the next couple of hours before dry 
conditions expected overnight. In the near term...did keep low 
chance probability of precipitation for scattered showers primarily over northeast 
Illinois and Northwest Indiana for the next couple of 
hours...removing any mention of thunder. 


Rodriguez 


//prev discussion... 
250 PM CDT 


Compact upper low over Wisconsin this afternoon continues to dig 
southeast across the western Great Lakes region. A cold front 
trailing from associated surface low over lower Michigan...trails 
southwest across Northwest Indiana into central Illinois and was just 
about to clear the southeast corner of the County Warning Area at 1930z. Gusty 
west-northwest winds up to 35 miles per hour at times were spreading drier air 
into the forecast area...though cold pool associated with upper low 
will bring the potential for isolated to scattered showers and 
possibly a thunderstorm into the northeast third or so of the 
forecast area through the remainder of the afternoon and early 
evening hours. Middle-level circulation moves off to the southeast this 
evening and a decrease in diurnal stratocu is expected to accompany 
cooler weather overnight...with temperatures falling off into the 
50s from the northwest. 


Upper pattern is in the process of evolving into a deep long wave 
trough across eastern North America...and an upper ridge in the 
west. This sets up a prolonged period of slightly cooler than normal 
weather...with highs in the middle-70s Monday...then generally in the 
middle-upper 70s through the remainder of the week. Some lake cooling 
expected into Northwest Indiana and along the immediate Illinois shore 
Monday with north winds becoming slightly northeast as gradient 
weakens Monday afternoon. Low level flow then becomes more 
west-northwest over the next several days as surface high pressure 
builds through the Missouri...mid-Mississippi and Ohio valleys...and 
a series of weak troughs rotate through the Great Lakes region. 


Subsidence behind departing upper low and west of deepening long 
wave trough axis is expected to suppress any shower potential 
Monday. Guidance depicts a series of minor short waves rotating 
through the western Great Lakes region within the western periphery 
of the core of the upper trough through the week however...with some 
threat of scattered diurnal showers/thunderstorms each day from 
Tuesday into Saturday. Models may be a little too moist in low 
levels given north-northwest flow near the surface through the 
period...have generally maintained 20-30 percent probability of precipitation for daily 
shower trends. Some indication of a deeper middle-level short wave 
Friday with slightly higher blended model probability of precipitation at that time. Trough 
axis drifts east with weak surface high depicted over next 
weekend...with dry forecast Saturday night-Sunday. 


Ratzer 


&& 


Aviation... 


//Ord and mdw concerns...updated 06z... 


* temporary MVFR ceilings possible prior to daybreak. 
* Gusty north to north-northeast winds today. 




//Discussion...updated 06z... 


Low pressure will continue to move away across the northeast U.S. 
With northerly winds continuing over the taf sites through today. 
On the local scale at Ord and mdw...the wind direction is likely 
to wobble some between 340 and 020 through early morning and then 
become more 010-020 from middle-morning on due to influence of the 
nearby lake. Wind gusts at times today of 20 knots or slightly higher 
are likely. Scattered cumulus are likely today but no 
precipitation expected. 




//Ord and mdw confidence...updated 06z... 


* high that any MVFR ceilings will be temporary and above 2000 feet. 
* High in wind speed and medium in wind direction...including 15z 
timing of north-northeast direction. 




//Outlook for Ord/mdw for 12z Tuesday-12z Sunday...updated 00z... 


Tuesday through Saturday...predominantly VFR. 


Mtf/izzi 


&& 


Marine... 
210 PM CDT 


An active period of weather in underway over Lake Michigan. 
Deepening low pressure has passed across Northern Lake Michigan 
and is moving through lower Michigan this afternoon to the eastern 
Great Lakes this evening. Following the passage of this low and an 
associated cold front...strengthening northwest winds are 
filtering across the lake and quickly increasing to 20-25kt with 
occasional gusts to 30kt and scattered thunderstorms. The scattered 
thunderstorms should continue into the evening while winds 
gradually veer more northerly and increase to prevailing 30kt. 
Occasional gale force gusts to 35 knots are possible...but should not be 
persistent enough to necessitate a Gale Warning. Small craft 
advisories have already been hoisted for the Illinois and Indiana 
nearshore waters and no change has been made to the timing 
details. High pressure building across the northern plains this 
afternoon and should begin to spread across the western Great 
Lakes Monday. As the high spreads across the lake late 
Monday...winds should diminish quickly. On Tuesday...a surface trough 
or or weak cold front tracking south down the lake will bring a 
reinforcing shot of cooler air...bringing a brief increase to northwesterly 
winds Tuesday morning. Following the passage of this weak 
trough/cold front...the high pressure will spread across the 
western Great Lakes to the Ohio Valley by Wednesday. High pressure 
will be the dominant feature over the Great Lakes region from middle 
week into the weekend...setting up a period of quiet weather with 
light and variable winds and minimal wave action. 


Krein 


&& 


Lot watches/warnings/advisories... 
Illinois...beach hazards statement...ilz014 until 4 am Tuesday. 


Beach hazards statement...ilz006 until 10 PM Monday. 


In...beach hazards statement...inz001-inz002 until 4 am Tuesday. 


Lm...Small Craft Advisory...nearshore Winthrop Harbor to northerly is until 10 PM Monday. 


Small Craft Advisory...nearshore northerly is to Michigan City in until 4 am 
Tuesday. 


&& 


$$ 


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