Install
Carol Stream, IL 60197 Weather
Current conditions
Observed at Chicago / West Chicago, Dupage Airport · 52 min ago
Forecast
10-day-
This Afternoon
Sunny. High near 68, with temperatures falling to around 65 in the afternoon. East southeast wind 0 to 5 mph.
-
Tonight
Patchy fog after 4am. Mostly clear, with a low around 44. East wind 0 to 5 mph.
-
Wednesday
Patchy fog before 8am. Sunny. High near 70, with temperatures falling to around 67 in the afternoon. Southwest wind 0 to 5 mph.
National Weather Service forecast updated 8 hrs ago.
Hourly
Hourly forecast- Now65°
- 6 PM61°
- 7 PM58°
- 8 PM55°
- 9 PM53°
- 10 PM52°
- 11 PM51°
- Wed12 AM50°
- 1 AM49°
- 2 AM48°
- 3 AM47°
- 4 AM46°
- 5 AM45°
- 6 AM44°
- 7 AM44°
- 8 AM46°
- 9 AM52°
- 10 AM57°
- 11 AM62°
- 12 PM65°
- 1 PM68°
- 2 PM69°
- 3 PM69°
- 4 PM70°
10-day forecast
Details- TodayOct 20Sunny44°68°
- WedOct 21Patchy Fog then Sunny47°70°
- ThuOct 22Sunny48°70°
- FriOct 23Sunny48°67°
- SatOct 24Mostly Sunny51°68°
- SunOct 25Partly Sunny50°70°
- MonOct 26Mostly Sunny16%46°65°
- TueOct 27Cloudy43°53°
- WedOct 28Cloudy42°51°
- ThuOct 29Sunny40°54°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Carol Stream
More weather news-
Dense fog advisory issued for parts of Chicago area with with near-zero visibility on roadsParts of the Chicago area are under a dense fog advisory Tuesday morning, with visibility close to zero leading to dangerous driving conditions for the morning commute. The advisory, issued for Central Cook, Lake…
- Chicago, IL Tonight: Coldest Air Arrives Before Tuesday Oct 20
Chicago, IL – Residents heading outdoors late Monday night and early Tuesday morning should prepare for a chilly start as temperatures across the Chicago area drop into the low to mid-40s overnight, despite an unusually…
-
Frost advisory issued for parts of Chicago area, with frigid temps possibleWarm temps set to return, too The Chicago area will have to deal with another night of chilly temperatures, and parts of the region will be under a frost advisory overnight. According to the National Weather Service…
-
Chicago weather: Freeze and frost possible overnightCBS News Chicago weather: Freeze and frost possible overnight Eye on Chicago: The Chicago Lighthouse nonprofit marks 120th anniversary "Society of Screams" transforms Chicago Park District space into haunted house Elk…
- Illinois Winter Weather: First Snow Before Thanksgiving, Nov. 26?
Chicago, IL – Illinois residents wondering when the first measurable snowfall of the 2026 winter season might arrive could see dramatically different conditions depending on where they live. While Chicago typically…
-
Warmer winter predicted in Chicago amid “Super” El NiñoAs we move deeper into fall, a clearer picture is emerging of what the upcoming winter could look like across Chicago and the Great Lakes. NOAA released its official winter outlook Thursday, October 15, and the forecast…
-
Frost possible in some areas before a chilly Saturday, then a warmup beginsThere's usually a big temperature change in the fall, and after the week began with a record high of 88 degrees at O'Hare International Airport, it appears the cooler weather has arrived. Conditions were much different…
-
Community leaders say foiled Illinois mass shooting was result of surge in anti-Hindu hate onlineMostly cloudy with scattered thunderstorms (some with damaging wind gust potential) through early evening, then brisk and drier as it turns much cooler the rest of the night. . Bulletin: SEVERE THUNDERSTORM WATCH 686…
-
Winter weather outlook: What the latest maps show for temperatures, snow in the Chicago areaPete Sack has the latest forecast. The latest 2026-27 winter weather prediction for the Chicago area is here, and the latest outlook maps are giving a peek into what temperatures could be like over winter months. The…
-
Chilly Friday and Low 36 Overnight; Compare Chicago Weather to Phoenix, Miami, LA, Wash DCRadar is clear in northern Illinois at 9:30 a.m. Friday. Windy and seasonably chilly conditions expected today with some scattered showers, wind gusts over 30 mph are expected this afternoon. Showers associated with the…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- TueModerate
- WedModerate
- ThuModerate
Aurora and Elgin, IL reporting area · 57 min ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyChicago Area, records since 1872. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Chicago 41 km
- Aurora 23 km
- Joliet 43 km
- Naperville 14 km
- Elgin 18 km
- Waukegan 56 km
- Cicero 32 km
- Arlington Heights 23 km
- Evanston 39 km
- Schaumburg 14 km
- Bolingbrook 24 km
- Palatine 24 km
Forecasters' discussion
From the National Weather Service office in LOT, issued 3 hrs ago
Key Messages
- Areas of fog, including potentially dense fog, may develop again late tonight into early Wednesday morning in and near the Chicago metro.
- An extended period of dry and above to much above average temperatures is expected through the upcoming weekend.
Discussion
Issued at 226 PM CDT Tue Oct 20 2026
An Omega block that is in place over the CONUS is expected to persist through the end of the week. The associated ridge axis will only ever so slowly crawl eastward over the coming days, which will maintain broad surface high pressure across the region. As a result, dry conditions with an abundance of sunshine will continue through the remainder of the week with high temperatures remaining above to well above normal for this time of year. Daily lake breezes will cause the coolest (low- mid 60s) high temperatures to be observed near Lake Michigan each day.
Much like last night/early this morning, optimal radiational cooling conditions will likely allow for fog to develop late tonight into tomorrow morning and possibly again in the coming nights/mornings. This will particularly be the case in and near the Chicago metro within the footprint of the marine-influenced air brought inland during the daytime, where the fog could become dense once again.
There is pretty good ensemble agreement at this point in time that the blocking pattern will break down by early next week. This will allow for a cold front to drop through the region sometime on Monday or Tuesday, resulting in a return to cooler and more seasonable temperatures for the middle of next week. The frontal passage may bring a chance for precipitation to the area early-mid next week, but support for this across the latest suite of ensemble guidance is not ubiquitous, and there are considerable temporal differences with when this next potential opportunity for precipitation may arrive as well.
Ogorek
Aviation
Issued at 1255 PM CDT Tue Oct 20 2026
Key aviation forecast messages:
- IFR or lower VSBYs in BR/FG may develop again early WED AM.
The primary concern through the period is the potential for fog near Lake Michigan early Wednesday morning, some of which may become locally dense. Model guidance that performed well with this morning's dense fog depicts another round of fog development over a similar area and extends slightly farther southeast. Have accordingly included MDW with the reduced VSBYs as low as 1 SM with this update to hint at increasing confidence in fog development. If this signal persists and additional guidance begins to pick up on the potential for dense fog, LIFR (or lower) conditions may need to be introduced with later updates.
Otherwise winds will remain light (under 10 kt) initially out of the SE, turning E to ENE behind a weak lake breeze this afternoon. Winds then ease and become light and variable again overnight eventually settling into a SSW direction after daybreak Wednesday.
Petr
Lot Watches
IL...None. IN...None. LM...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.