Install
Arlington Heights, IL Weather
Current conditions
Observed at Chicago / Wheeling, Pal-Waukee Airport · 21 min ago
Forecast
10-day-
Tonight
Patchy fog after 1am. Partly cloudy, with a low around 46. North wind around 0 mph.
-
Tuesday
Patchy fog before 10am. Sunny. High near 67, with temperatures falling to around 64 in the afternoon. Northeast wind 0 to 5 mph.
-
Tuesday Night
Partly cloudy, with a low around 45. East northeast wind 0 to 5 mph.
National Weather Service forecast updated 5 hrs ago.
Hourly
Hourly forecast- Now48°
- 2 AM48°
- 3 AM47°
- 4 AM46°
- 5 AM46°
- 6 AM46°
- 7 AM46°
- 8 AM47°
- 9 AM51°
- 10 AM58°
- 11 AM61°
- 12 PM64°
- 1 PM66°
- 2 PM66°
- 3 PM67°
- 4 PM66°
- 5 PM64°
- 6 PM61°
- 7 PM56°
- 8 PM54°
- 9 PM53°
- 10 PM52°
- 11 PM51°
- Wed12 AM50°
10-day forecast
Details- TonightOct 19Partly Cloudy then Patchy Fog46°
- TodayOct 20Patchy Fog then Sunny45°67°
- WedOct 21Sunny48°69°
- ThuOct 22Sunny50°70°
- FriOct 23Sunny49°68°
- SatOct 24Mostly Sunny53°68°
- SunOct 25Partly Sunny51°69°
- MonOct 26Mostly Sunny65°
- TueOct 27Light rain0.11 in43°52°
- WedOct 28Cloudy40°51°
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 in Illinois
More weather news- Central Illinois Winter Weather Outlook
The winter weather outlook for central and southeast Illinois has been released, and a detailed summary is available at this link. Some of the highlights: Current Conditions Latest Observations Daily Climate Maps…
-
One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…
-
A great week ahead for Central IllinoisWAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…
-
Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…
-
Overnight Frost Advisory for parts of Illinois, NW IndianaCBS News Colorado 10pm Saturday CBS News Detroit Weekend 11pm CBS News Los Angeles Weekend 9pm CBS News Philadelphia Weekend 11pm KDKA News Weekend 11pm CBS News Texas Weekend 10pm
-
Frost advisory back in effect for Central IllinoisWAND DECATUR, Ill. (WAND) – Another cool day starts the weekend across Central Illinois with highs Saturday only reaching the upper 50s under plenty of sunny skies. Strong high pressure remains in control keeping skies…
- 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…
-
Frosty Nights Ahead Before a Warm-Up Arrives in Central IllinoisCENTRAL ILLINOIS (25News Now) - Central Illinois is in for a chilly weekend, with temperatures dropping into the 30s and frost possible overnight. But after a cool start to the weekend, a warming trend will bring…
-
Dangerous Freeze Warnings Issued for Iowa, Wisconsin, Minnesota and Illinois as Temperatures DropFreeze Warnings take effect early Saturday across much of Iowa, Wisconsin, southeast and central Minnesota and northern Illinois, with lows as cold as 26 degrees expected. Seven National Weather Service offices issued…
-
Frost advisory in effect for West Central Illinois; cool to start the weekendWAND DECATUR, Ill. (WAND) – Significantly cooler weather wraps up the work week behind the latest cold front with temperatures nearly 20 degrees below Thursday’s highs. Cloud cover remains through the day before skies…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- TueModerate
- WedModerate
- ThuModerate
North and West Suburbs (Chicago), IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Nearby
- Chicago 38 km
- Aurora 46 km
- Naperville 36 km
- Elgin 25 km
- Kenosha 57 km
- Waukegan 33 km
- Cicero 33 km
- Evanston 25 km
- Schaumburg 10 km
- Bolingbrook 44 km
- Palatine 5 km
- Skokie 21 km
Forecasters' discussion
From the National Weather Service office in LOT, issued 51 min ago
Key Messages
- Shallow fog may develop in northeastern Illinois early Tuesday morning. Any fog would dissipate a few hours after sunrise.
- An extended period of dry and above to much above average temperatures is expected through the next 7 days.
Discussion
Issued at 1223 PM CDT Mon Oct 19 2026
The only item of note is a threat for shallow fog overnight into tomorrow morning near Lake Michigan where a modestly more moist environment will advect inland. Otherwise, no significant weather is expected the next 7 days with above to much above average temperatures each day. Generally light winds should allow weak lake breezes to form each of the next several afternoons, but probably only result in slightly cooler conditions right near the lake. Other than a bit of mid-high level cloudiness this afternoon, much of the week looks to be mostly sunny.
- Izzi/Borchardt
Aviation
Issued at 1230 AM CDT Tue Oct 20 2026
Key Aviation Messages for the current TAF period:
- Patchy fog possible around sunrise.
Winds are expected to be light and variable, if not outright calm through the overnight. There is a chance for patchy fog toward daybreak for Chicago terminals, with better chances closer to the lake. There is still uncertainty with how low visibilities will go, but will be monitored through the night. But the expectation is that any fog that does form should dissipate after sunrise for a return to VFR.
Light winds will prevail through the day, mostly out of the east. There is another chance for patchy fog tomorrow morning. Given there is little change to the overall weather pattern tomorrow, would like to see how this morning plays out first before adding fog to the TAFs for Wednesday morning.
DK
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.