Dekalb, Illinois Weather Conditions

Your Weather

To update your location please enter your ZIP code, city, state, airport code or country in the field below. Weather by E-mail: Forecast storm alerts. Weather E-Mail Alert Sign Up »

Current Conditions

  • 44°
  • Clear
  • Wind: SSW 8 mph
  • Humidity: 91%
  • Visibility: 10.0 miles
  • Dew Point: 42°
  • Pressure: 29.84 in. +
  • Heat Index: 39

Select a Section

Click a section below for more information.

Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Mostly Cloudy
Mostly Cloudy
Fog
Fog
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
45°
43°
52°
59°
57°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Partly Cloudy
  • High: 61 °
  • Low: 39 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 52 °
  • Low: 34 °
  • Partly Cloudy
  • Wednesday
  • Clear
  • High: 55 °
  • Low: 37 °
  • Clear
  • Thursday
  • Mostly Cloudy
  • High: 57 °
  • Low: 43 °
  • Mostly Cloudy
  • Friday
  • Partly Cloudy
  • High: 61 °
  • Low: 46 °
  • Partly Cloudy

Forecast for Dekalb, Illinois

Updated: 4:00 PM CDT on October 19, 2014

  • Monday

    Partly cloudy. Fog early. High of 61F. Winds from the WNW at 10 to 15 mph.

  • Monday Night

    Partly cloudy. Low of 39F. Winds from the NNW at 5 to 10 mph.

  • Tuesday

    Partly cloudy in the morning, then overcast. High of 52F. Winds from the NNE at 10 to 15 mph.

  • Tuesday Night

    Partly cloudy. Fog overnight. Low of 34F. Winds from the NE at 5 to 10 mph.

  • Wednesday

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

  • Wednesday Night

    Partly cloudy. Fog overnight. Low of 37F. Winds from the SE at 5 to 10 mph.

  • Thursday

    Clear in the morning, then overcast. High of 57F. Winds from the South at 5 to 10 mph.

  • Thursday Night

    Partly cloudy with a chance of rain. Fog overnight. Low of 43F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.

  • Friday

    Partly cloudy. High of 61F. Winds from the SW at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 46F. Winds from the SW at 5 to 10 mph.

  • Saturday

    Partly cloudy. Fog early. High of 63F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy. Fog overnight. Low of 45F. Winds from the South at 5 to 10 mph.

  • Sunday

    Partly cloudy. Fog early. High of 59F. Breezy. Winds from the South at 10 to 20 mph.

  • Sunday Night

    Mostly cloudy. Fog overnight. Low of 41F. Winds from the South at 10 to 15 mph.

  • Monday

    Overcast. Fog early. High of 55F. Winds from the SW at 5 to 15 mph.

  • Monday Night

    Mostly cloudy with a chance of rain. Fog overnight. Low of 39F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday

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

  • Tuesday Night

    Clear. Low of 43F. Winds less than 5 mph.

  • Wednesday

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

  • Wednesday Night

    Clear. Low of 41F. Winds less than 5 mph.

  • Thursday

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

  • Thursday Night

    Clear. Low of 41F. Winds from the SSW at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South DeKalb, DeKalb, IL

Updated: 3:05 AM CDT

Temperature: 47.3 °F Dew Point: 44 °F Humidity: 90% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Rob's Horsepower Haven, DeKalb, IL

Updated: 3:05 AM CDT

Temperature: 47.7 °F Dew Point: 44 °F Humidity: 88% Wind: SSW at 1.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: DeKalb, IL

Updated: 3:05 AM CDT

Temperature: 46.3 °F Dew Point: 44 °F Humidity: 92% Wind: SSW at 11.0 mph Pressure: 29.82 in Hourly Precipitation: - Windchill: 41 °F Graphs

Location: Sycamore, IL

Updated: 3:05 AM CDT

Temperature: 45.4 °F Dew Point: 43 °F Humidity: 90% Wind: SW at 1.0 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: MesoWest MALTA1 IL US UPR, Malta, IL

Updated: 1:35 AM CDT

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

Location: MesoWest IL-64 @ Virgil Drainage Ditch IL US ILDOT, Sycamore, IL

Updated: 2:27 AM CDT

Temperature: 46 °F Dew Point: 45 °F Humidity: 96% Wind: South at 6 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: Heron Creek, Sycamore, IL

Updated: 2:00 AM CDT

Temperature: 48.5 °F Dew Point: 44 °F Humidity: 84% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: OG Heron Creek, Sycamore, IL

Updated: 3:05 AM CDT

Temperature: 46.8 °F Dew Point: 44 °F Humidity: 89% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: The Rockin' N, Waterman, IL

Updated: 3:05 AM CDT

Temperature: 69.1 °F Dew Point: - Humidity: - Wind: North at - Pressure: 29.79 in Hourly Precipitation: - Windchill: - Graphs

Location: Out On the Farm, Clare, IL

Updated: 2:54 AM CDT

Temperature: 48.5 °F Dew Point: 45 °F Humidity: 88% Wind: WSW at 4.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Ellen Oaks Subdivision, Genoa, IL

Updated: 3:05 AM CDT

Temperature: 48.6 °F Dew Point: 45 °F Humidity: 87% Wind: SSW at 2.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 49 °F Graphs

Location: Genoa Road, Genoa, IL

Updated: 3:02 AM CDT

Temperature: 48.0 °F Dew Point: 45 °F Humidity: 88% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: APRSWXNET Elburn IL US, Campton Hills, IL

Updated: 2:21 AM CDT

Temperature: 46 °F Dew Point: 43 °F Humidity: 90% Wind: SSW at 1 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Columbine Square, Elburn, IL

Updated: 2:53 AM CDT

Temperature: 46.0 °F Dew Point: 44 °F Humidity: 93% Wind: SSW at 1.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Prairie Highlands, Elburn, IL

Updated: 3:05 AM CDT

Temperature: 47.5 °F Dew Point: 45 °F Humidity: 92% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: Cheval-De-Selle, Elburn, IL

Updated: 3:00 AM CDT

Temperature: 43.7 °F Dew Point: 42 °F Humidity: 92% Wind: ESE at 1.7 mph Pressure: 29.77 in Hourly Precipitation: - Windchill: 44 °F Graphs

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

Updated: 2:26 AM CDT

Temperature: 49 °F Dew Point: 45 °F Humidity: 84% Wind: North at 11 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Hampshire, IL, Hampshire, IL

Updated: 3:05 AM CDT

Temperature: 45.4 °F Dew Point: 42 °F Humidity: 87% Wind: SSE at 5.0 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Windchill: 43 °F Graphs

Location: K9GPC, Rochelle, IL

Updated: 3:05 AM CDT

Temperature: 47.3 °F Dew Point: 29 °F Humidity: 49% Wind: Calm Pressure: 29.09 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

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

Updated: 3:05 AM CDT

Temperature: 47.0 °F Dew Point: 44 °F Humidity: 90% Wind: West at 1.0 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: OakGrove, Hampshire, IL

Updated: 2:56 AM CDT

Temperature: 45.1 °F Dew Point: 45 °F Humidity: 99% Wind: SSW at 2.2 mph Pressure: 29.72 in Hourly Precipitation: - Windchill: 45 °F Graphs

Location: Geneva, IL

Updated: 3:04 AM CDT

Temperature: 47.6 °F Dew Point: 44 °F Humidity: 88% Wind: East at 5.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Windchill: 45 °F Graphs

Location: Campton Hills, Campton Hills, IL

Updated: 3:05 AM CDT

Temperature: 47.4 °F Dew Point: 46 °F Humidity: 94% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Windswept Acres, Marengo, IL

Updated: 3:03 AM CDT

Temperature: 45.6 °F Dew Point: 44 °F Humidity: 94% Wind: South at 1.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Mill Creek, Geneva, IL

Updated: 3:02 AM CDT

Temperature: 46.1 °F Dew Point: 44 °F Humidity: 91% Wind: SSE at 3.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Mill Creek (NE), Geneva, IL

Updated: 3:05 AM CDT

Temperature: 47.3 °F Dew Point: 45 °F Humidity: 90% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: MesoWest FLAGG1 IL US UPR, Ashton, IL

Updated: 12:10 AM CDT

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

Location: WB9NJJ, Rochelle, IL

Updated: 3:05 AM CDT

Temperature: 50.0 °F Dew Point: 31 °F Humidity: 47% Wind: Calm Pressure: 29.55 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Plano, Plano, IL

Updated: 3:03 AM CDT

Temperature: 49.1 °F Dew Point: 45 °F Humidity: 87% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Windchill: 49 °F Graphs

Location: Creek Side, Elgin, IL

Updated: 3:05 AM CDT

Temperature: 48.2 °F Dew Point: 44 °F Humidity: 85% Wind: SSW at 2.0 mph Pressure: 28.92 in Hourly Precipitation: 0.00 in Windchill: 48 °F Graphs

Location: Waterford Oaks, North Aurora, IL

Updated: 3:05 AM CDT

Temperature: 48.6 °F Dew Point: 46 °F Humidity: 89% Wind: South at 6.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: West Batavia, Batavia, IL

Updated: 2:58 AM CDT

Temperature: 48.0 °F Dew Point: 45 °F Humidity: 88% Wind: Calm Pressure: 29.82 in Hourly Precipitation: - Windchill: 48 °F Graphs

Location: Dover Ridge, Geneva, IL

Updated: 3:05 AM CDT

Temperature: 48.6 °F Dew Point: 45 °F Humidity: 88% Wind: SSW at 5.8 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

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

Updated: 2:59 AM CDT

Temperature: 49.5 °F Dew Point: 43 °F Humidity: 77% Wind: SW at 5.4 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Gilberts, IL, Gilberts, IL

Updated: 3:05 AM CDT

Temperature: 48.9 °F Dew Point: 44 °F Humidity: 84% Wind: NW at 6.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Windchill: 46 °F Graphs

Location: Belvidere, Belvidere, IL

Updated: 3:02 AM CDT

Temperature: 46.2 °F Dew Point: 42 °F Humidity: 86% Wind: WSW at 2.7 mph Pressure: 29.57 in Hourly Precipitation: - Windchill: 46 °F Graphs

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

Updated: 2:26 AM CDT

Temperature: 50 °F Dew Point: 44 °F Humidity: 78% Wind: SW at 8 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: Hunt Club, St. Charles, IL

Updated: 3:05 AM CDT

Temperature: 47.5 °F Dew Point: 46 °F Humidity: 95% Wind: Calm Pressure: 29.42 in Hourly Precipitation: 0.00 in Windchill: 48 °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 
1224 am CDT Monday Oct 20 2014 


Discussion... 
152 PM CDT 


Tonight... 
visible imagery this afternoon indicates a thin cirrus shield over 
the region...with some enhancement to the cloud cover across 
Wisconsin ahead of a frontal boundary that is pushing from west to 
east across the western Great Lakes. Surface ridge has drifted southeast 
of the forecast area...which has allowed low level flow to turn 
southwesterly. Between the next ridge of high pressure and the 
departing ridge...weak troughing will slide east across the upper 
Midwest/Great Lakes. This has produced a bump in the gradient and 
resulted in breezy conds this afternoon from a good mixed layer. 


Guidance has slowed the arrival of the frontal boundary 
slightly...but there remains some consistency that the 
moisture/precipitation will be displaced to the northeast of the forecast 
area through the overnight period. Temperatures tonight will be warmer than 
the prior night with lows generally in the low/middle 40s. 


Monday through Thursday... 
500mb trough axis will continue to pivot east of the region by 
midday Monday...however there does appear to be some wrap around 
moisture trying to slide south across the lake and may produce some 
sprinkles/light rain for northwest in. Have maintained a dry forecast 
for northeast Illinois...however late Monday evening a few spotty showers could 
sneak into the Chicago metropolitan area into Tuesday morning. Otherwise expect 
the far western forecast area to remain dry. Then broad 
anti-cyclonic flow arrives and is expected to remain in place through 
the second half of the week. Temperatures Monday will likely be the warmest in 
the upper 50s to low 60s...then cooling into the low/middle 50s for 
Tue/Wed/thur. With high pressure poised to be overhead Tuesday 
ngt-Wed-ngt...lows in many areas could easily dip into the middle 30s. 


Friday through next weekend... 
ensembles continue with the rather benign pattern into the weekend. 
Trough digs into the southwest Continental U.S....but is prognosticated to weaken by 
Sat/sun. High amplitude ridging over the central Continental U.S. Will 
gradually weaken late in the week...however current guidance 
suggests the dry pattern will persist into at least Sat. Temperatures will 
steadily return to near seasonal conds with highs around 60 to the low 
60s by the weekend. 


Beachler 


&& 


Aviation... 


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


* southwest winds become west this morning...northwest this 
afternoon then north/northeast late this afternoon. Cms 


//discussion...updated 06z... 


A cold front will move across the terminals later this morning... 
shifting southwesterly winds to the west/northwest by middle morning 
and then to the northwest by early afternoon. Speeds 10-12kts with 
a few higher gusts to start will diminish some by sunrise then 
increase again to 10-12kts this afternoon. As the front continues 
east this afternoon...the gradient becomes a bit weaker over the 
southern end of Lake Michigan. This will likely allow winds to 
shift to the north/northeast by late afternoon. Confidence in 
speeds is a bit lower...with prevailing speeds likely to be just 
under 10kts. 


Middle clouds will shift east early this morning with lower VFR... 
3-5kft ceilings over the northern lakes moving south across the area 
later this morning and continuing into this evening with some 
potential for high MVFR ceilings...especially south of the lake 
affecting gyy. Cms 


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


High for winds through middle morning...then medium for direction and 
timing changes this afternoon/evening. Cms 


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


Tuesday...VFR. Breezy northeast winds. 


Wednesday...VFR. East winds. 


Thursday through Saturday...VFR. Light west to southwest winds. 


Mdb 


&& 


Marine... 
324 PM CDT 


Low pressure moving through Ontario tonight will drag a cold 
front across the lake and tighten the pressure gradient this 
evening. Gale force gusts are possible for a time but generally 
winds should stay below Gale Warning criteria. A Small Craft 
Advisory continues for nearshore waters this evening and through 
the early overnight hours due to strong offshore winds...but waves 
should not be a big problem until winds turn northwest and then 
north by late Monday...increasing again in a gradient between an 
approaching high and the slowly departing low. These strong 
northerly winds persist through Tuesday after which time the ridge 
moves over the lake bringing fairly quiet conditions. 


Lenning 


&& 


Lot watches/warnings/advisories... 
Illinois...none. 
In...none. 
Lm...Small Craft Advisory...nearshore waters until 3 am Monday. 


&& 


$$ 


Visit US at http://weather.Gov/Chicago (all lowercase) 


Follow US on facebook...twitter...and youtube at: 
www.Facebook.Com/nwschicago 
www.Twitter.Com/nwschicago 
www.Youtube.Com/nwschicago 



National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Powered by the Weather Underground, Inc.