Dekalb, Illinois Weather Conditions

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Current Conditions

  • 65°
  • Clear
  • Wind: WSW 6 mph
  • Humidity: 56%
  • Visibility: 10.0 miles
  • Dew Point: 49°
  • Pressure: 30.36 in. 0

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Next 12 Hours

10  am
1  pm
4  pm
7  pm
10  pm
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Overcast
Overcast
59°
64°
72°
59°
55°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Clear
  • High: 72 °
  • Low: 48 °
  • Clear
  • Wednesday
  • Partly Cloudy
  • High: 70 °
  • Low: 52 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 73 °
  • Low: 52 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 75 °
  • Low: 52 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 77 °
  • Low: 54 °
  • Partly Cloudy

Forecast for Dekalb, Illinois

Updated: 10:00 AM CDT on September 23, 2014

  • Tuesday

    Clear in the morning, then partly cloudy. High of 72F. Winds from the SSW at 5 to 10 mph.

  • Tuesday Night

    Overcast in the evening, then clear. Low of 48F. Winds from the SE at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High of 70F. Winds from the SE at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 52F. Winds from the SE at 5 to 10 mph.

  • Thursday

    Overcast in the morning, then partly cloudy. High of 73F. Winds from the SSE at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 52F. Winds from the SE at 5 to 10 mph.

  • Friday

    Partly cloudy. High of 75F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 52F. Winds from the SE at 5 to 10 mph.

  • Saturday

    Clear in the morning, then partly cloudy. High of 77F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy. Low of 54F. Winds less than 5 mph.

  • Sunday

    Mostly cloudy. High of 75F. Winds less than 5 mph.

  • Sunday Night

    Partly cloudy. Low of 57F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 77F. Winds less than 5 mph.

  • Monday Night

    Clear. Low of 55F. Winds less than 5 mph.

  • Tuesday

    Clear. High of 73F. Winds from the SE at 5 to 10 mph.

  • Tuesday Night

    Clear. Low of 59F. Winds from the SE at 5 to 10 mph.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm. High of 75F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 59F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Thursday

    Overcast with a chance of rain. High of 70F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Overcast with a chance of rain. Low of 52F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Friday

    Overcast with a chance of rain. High of 64F. Winds less than 5 mph. Chance of rain 50%.

  • Friday Night

    Clear. Low of 52F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 11:21 AM CDT

Temperature: 69.0 °F Dew Point: 52 °F Humidity: 55% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Northern Illinois University, DeKalb, IL

Updated: 11:21 AM CDT

Temperature: 69.9 °F Dew Point: 52 °F Humidity: 53% Wind: Calm Pressure: 30.25 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 11:19 AM CDT

Temperature: 67.5 °F Dew Point: 54 °F Humidity: 61% Wind: Calm Pressure: 30.33 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: DeKalb, IL

Updated: 11:17 AM CDT

Temperature: 67.7 °F Dew Point: 49 °F Humidity: 52% Wind: West at 6.0 mph Pressure: 30.31 in Hourly Precipitation: - Windchill: - Graphs

Location: Sycamore, IL

Updated: 11:21 AM CDT

Temperature: 66.9 °F Dew Point: 49 °F Humidity: 53% Wind: Calm Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest MALTA1 IL US UPR, Malta, IL

Updated: 7:40 AM CDT

Temperature: 47 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Heron Creek, Sycamore, IL

Updated: 11:21 AM CDT

Temperature: 69.4 °F Dew Point: 49 °F Humidity: 48% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 11:21 AM CDT

Temperature: 68.2 °F Dew Point: 49 °F Humidity: 51% Wind: SE at 4.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Out On the Farm, Clare, IL

Updated: 11:17 AM CDT

Temperature: 69.8 °F Dew Point: 51 °F Humidity: 52% Wind: SW at 3.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 11:21 AM CDT

Temperature: 67.1 °F Dew Point: 52 °F Humidity: 58% Wind: Calm Pressure: 30.33 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest ELBRN1 IL US UPR, Elburn, IL

Updated: 7:30 AM CDT

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

Location: Genoa Road, Genoa, IL

Updated: 11:16 AM CDT

Temperature: 66.5 °F Dew Point: 52 °F Humidity: 61% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Columbine Square, Elburn, IL

Updated: 11:16 AM CDT

Temperature: 67.9 °F Dew Point: 52 °F Humidity: 58% Wind: Calm Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 11:20 AM CDT

Temperature: 68.4 °F Dew Point: 53 °F Humidity: 59% Wind: Calm Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Cheval-De-Selle, Elburn, IL

Updated: 10:57 AM CDT

Temperature: 66.9 °F Dew Point: 51 °F Humidity: 57% Wind: North at 4.7 mph Pressure: 30.28 in Hourly Precipitation: - Windchill: - Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 11:21 AM CDT

Temperature: 67.7 °F Dew Point: 52 °F Humidity: 58% Wind: WSW at 4.0 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: K9GPC, Rochelle, IL

Updated: 11:21 AM CDT

Temperature: 73.3 °F Dew Point: 6 °F Humidity: 7% Wind: South at 5.8 mph Pressure: 29.56 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 11:21 AM CDT

Temperature: 70.1 °F Dew Point: 54 °F Humidity: 56% Wind: Calm Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Geneva, IL

Updated: 11:20 AM CDT

Temperature: 68.0 °F Dew Point: 51 °F Humidity: 54% Wind: ENE at 4.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 11:21 AM CDT

Temperature: 71.6 °F Dew Point: 49 °F Humidity: 45% Wind: Calm Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Windswept Acres, Marengo, IL

Updated: 11:19 AM CDT

Temperature: 67.1 °F Dew Point: 51 °F Humidity: 57% Wind: SW at 1.0 mph Pressure: 30.31 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Mill Creek, Geneva, IL

Updated: 11:15 AM CDT

Temperature: 66.7 °F Dew Point: 50 °F Humidity: 55% Wind: WSW at 3.0 mph Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 11:21 AM CDT

Temperature: 66.4 °F Dew Point: 51 °F Humidity: 58% Wind: Calm Pressure: 30.36 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 10:20 AM CDT

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

Location: WB9NJJ, Rochelle, IL

Updated: 11:21 AM CDT

Temperature: 68.5 °F Dew Point: 22 °F Humidity: 17% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Thornwood, South Elgin, IL

Updated: 11:10 AM CDT

Temperature: 68.4 °F Dew Point: 53 °F Humidity: 58% Wind: WSW at 2.7 mph Pressure: 30.25 in Hourly Precipitation: - Windchill: - Graphs

Location: Plano, Plano, IL

Updated: 11:08 AM CDT

Temperature: 67.6 °F Dew Point: 51 °F Humidity: 55% Wind: Calm Pressure: 30.32 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Creek Side, Elgin, IL

Updated: 11:21 AM CDT

Temperature: 69.5 °F Dew Point: 51 °F Humidity: 52% Wind: Calm Pressure: 29.44 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Waterford Oaks, North Aurora, IL

Updated: 11:21 AM CDT

Temperature: 67.2 °F Dew Point: 52 °F Humidity: 57% Wind: West at 3.0 mph Pressure: 30.34 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: West Batavia, Batavia, IL

Updated: 11:11 AM CDT

Temperature: 65.8 °F Dew Point: 52 °F Humidity: 62% Wind: Calm Pressure: 30.31 in Hourly Precipitation: - Windchill: - Graphs

Location: Dover Ridge, Geneva, IL

Updated: 11:21 AM CDT

Temperature: 65.6 °F Dew Point: 51 °F Humidity: 59% Wind: SSW at 5.8 mph Pressure: 30.33 in Hourly Precipitation: 0.00 in Windchill: - Graphs

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

Updated: 11:20 AM CDT

Temperature: 66.9 °F Dew Point: 50 °F Humidity: 54% Wind: SSE at 5.4 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Gilberts, IL, Gilberts, IL

Updated: 11:20 AM CDT

Temperature: 70.9 °F Dew Point: 48 °F Humidity: 44% Wind: East at 4.5 mph Pressure: 30.53 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Belvidere, Belvidere, IL

Updated: 11:11 AM CDT

Temperature: 73.2 °F Dew Point: 49 °F Humidity: 43% Wind: West at 3.7 mph Pressure: 30.11 in Hourly Precipitation: - 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 
930 am CDT Tuesday Sep 23 2014 


Discussion... 
148 am CDT 


Synopsis...dry and warming conditions are expected through the 
weekend. 


Today through Wednesday... 
high pressure is over the Ohio River valley and it will dominate 
the pattern. Expecting quiet dry weather with temperatures slowly warming. 
Highs today will be in the lower 70s away from the lake while a lake 
breeze will keep temperatures along the lake in the upper 60s. 


Light southeast winds are expected tonight and may see few to scattered 
cirrus as a weakening upper level trough moves over western 
Minnesota and Iowa. Lows will once again vary from the low to middle 
50s downtown to the upper 40s in the outlying areas. 


Wednesday looks similar to today with sunny skies and highs in the 
low to middle 70s. Winds will turn off of the lake so temperatures along the 
lake will top out around 70. 


Jee 


Wednesday night through Friday... 
broad anti-cyclonic flow will continue to influence the region Wednesday 
ngt-Fri...despite the ridge center being displaced well east of the 
Great Lakes. Weak moisture starved middle-level trough is poised to pivot 
east across the plains Wednesday ngt/thur. Expect this to produce a few 
clouds...then diffluence flow aloft returns late Thursday into Friday with 
a return to abundant sunshine. With the light low level flow and persistent 
dry weather...the surface should easily warm into the middle 70s Thursday to 
perhaps the upper 70s Friday. Afternoon lake breezes will keep the adjacent 
areas cooler. Overnight lows will generally be in the low/middle 
50s...with a few points dipping into the upper 40s. 


Saturday through Monday... 
500mb ridge arrives late week and will likely persist through the 
weekend...with ensembles indicating a steady weakening to the 
strength by early next week. However downstream across the Canadian 
maritime a trough is prognosticated to develop...which could slow the rate 
of weakening to the ridge over the Great Lakes. With the continued 
dry pattern and light flow...surface temperatures will remain seasonal to a few 
degrees above in the middle 70s with afternoon lake breezes keeping nearby 
land slightly cooler. Overnight lows will mainly be in the low/middle 
50s. 


Beachler 


&& 


Aviation... 


//Ord and mdw concerns...updated 14z... 


* winds turning east this afternoon associated with a lake breeze. 


Jee 


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


High pressure is expected to dominate the weather pattern through 
next weekend leading to a dry...VFR forecast. The only concern 
today will be a lake breeze pushing through this afternoon. 
Ord...mdw...and gyy will see southeast to east winds around 9 knots. Still have 
limited confidence in wind speeds behind the lake breeze. Winds 
then become southeast and weaken in the evening. Southeast winds pick up 
to around 7 knots by late Wednesday morning and another lake breeze is 
expected in the afternoon. 


Jee 


//Ord and mdw confidence...updated 14z... 


* medium-high confidence in lake breeze timing...medium confidence 
in associated wind speed. 


Jee 


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


Wednesday night...VFR. 


Thursday through Sunday...VFR with afternoon lake breezes. 


Monday...VFR. 


Jee 


&& 


Marine... 
148 am CDT 


Quiet weather continues with a lake breeze expected this afternoon 
and each day through the weekend. Flow over the open waters will be 
weak and out of the south through Sunday. Wind direction will vary a 
bit more over the southern end of the lake where winds will be 
southeast to east. Winds veer to the north Sunday night and 
increase to 10-20 knots Monday. 


Jee 


&& 


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


$$ 


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