Waukegan, IL 60079 Weather

Lake County10:55 PM CDT42.36°N, 87.84°W

Current conditions

Clear
48°
Clear
Feels like 47°
High 64° Thursday·Low 47° tonight
WindSW 3 mph
Humidity87%
Dew point45°
Pressure30.22 inHg
Visibility10 mi
Cloud cover5%
UV index0 Low
Sunrise7:12 AM
Sunset6:02 PM

Observed at Chicago/Waukegan Regional Airport · 1 hr ago

Forecast

10-day

  • Tonight

    Patchy fog after 3am. Clear. Low around 47, with temperatures rising to around 49 overnight. West wind around 0 mph.

  • Thursday

    Patchy fog before 9am. Sunny. High near 64, with temperatures falling to around 62 in the afternoon. North northeast wind 0 to 5 mph.

  • Thursday Night

    Partly cloudy, with a low around 49. East wind 0 to 5 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Clear 52°
  2. 11 PM Clear 52°
  3. Thu12 AM Clear 52°
  4. 1 AM Clear 52°
  5. 2 AM Clear 51°
  6. 3 AM Patchy Fog 51°
  7. 4 AM Patchy Fog 50°
  8. 5 AM Patchy Fog 49°
  9. 6 AM Patchy Fog 48°
  10. 7 AM Patchy Fog 48°
  11. 8 AM Patchy Fog 50°
  12. 9 AM Sunny 54°
  13. 10 AM Sunny 60°
  14. 11 AM Sunny 63°
  15. 12 PM Sunny 64°
  16. 1 PM Sunny 64°
  17. 2 PM Sunny 64°
  18. 3 PM Sunny 63°
  19. 4 PM Sunny 63°
  20. 5 PM Sunny 62°
  21. 6 PM Mostly Clear 59°
  22. 7 PM Partly Cloudy 58°
  23. 8 PM Partly Cloudy 54°
  24. 9 PM Partly Cloudy 53°

10-day forecast

Details
  1. TonightOct 21 Clear then Patchy Fog Clear then Patchy Fog47°
  2. ThuOct 22 Patchy Fog then Sunny Patchy Fog then Sunny49°64°
  3. FriOct 23 Mostly Sunny Mostly Sunny51°65°
  4. SatOct 24 Mostly Sunny Mostly Sunny53°68°
  5. SunOct 25 Partly Sunny Partly Sunny53°69°
  6. MonOct 26 Partly Sunny Partly Sunny16%50°63°
  7. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers23%47°59°
  8. WedOct 28 Slight Chance Rain Showers then Partly Sunny Slight Chance Rain Showers then Partly Sunny15%61°
  9. ThuOct 29 Cloudy Cloudy41°54°
  10. FriOct 30 Mostly sunny Mostly sunny42°57°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Illinois

More weather news

Air quality

53
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedModerate
  • ThuModerate
  • FriModerate

Lake County, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:12 AM
Sunset 6:02 PM
Daylight 10 h 49 min (−2 min 42 s tomorrow)
Waxing Gibbous · 82% lit
Moonrise 3:46 PM Moonset 2:08 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low58° / 43°
Record high87° (1947)
Record low21° (2018)
Wettest5.66 in (1965)
Yesterday61° / 40°
Month to date2.02 in (normal 2.31 in)

Kenosha Wwtp, records since 1944. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in LOT, issued 4 hrs ago

Key Messages

- The dry and unseasonably mild weather will continue through the upcoming weekend.

Discussion

Issued at 136 PM CDT Wed Oct 21 2026

An anomalously strong mid-level ridge over the central CONUS will anchor omega blocking across much of North America over the next several days. Meanwhile, an elongated surface ridge extending from the Lower Mississippi River Valley to the Canadian Maritimes is in the processes of congealing with another expansive high pressure shifting toward the Upper Great Lakes. As a result, quiet weather with unseasonably warm conditions will continue through the upcoming weekend. As was observed the past few mornings, generally clear skies and light/calm winds should promote shallow fog across primarily interior northern Illinois late tonight through sunrise Thursday.

The blocking pattern will slowly break down early next week as the ridge flattens and a southwestern upper-level low begins to meander toward the central CONUS. A series of smaller troughs on the periphery of a developing longwave trough across the north Pacific and western Canada will eventually pick up the southwestern low. Consensus guidance suggests that the influence of the low on our area could occur as early as Monday night, but more likely Tuesday and Wednesday. Cooler and more seasonable conditions would accompany this system.

Kluber

Aviation

Issued at 641 PM CDT Wed Oct 21 2026

Main aviation forecast concern is the potential for patchy IFR/LIFR fog to develop mainly northwest of Chicago early Thursday morning.

Surface high pressure ridge has shifted east of the area across lower MI/IN early this evening. Light south-southwest surface winds at the terminals are expected to quickly become light/variable or just calm early this evening, though there may be a brief (1-hour)period of light east winds at ORD/MDW/GYY as a weak lake breeze decays. The pressure gradient will remain weak into Thursday, keeping winds light/variable through the morning before becoming light (5-6 kts) northeast and eventually east in the afternoon/evening.

Clear skies and light/calm winds tonight will allow for ideal radiative cooling conditions, allowing shallow fog to develop in spots once again. This appears most likely across southern WI/northeast IA and far northern/northwest IL KRFD) where surface dew points remained in the mid-upper 40s during peak mixing Wednesday afternoon. While guidance is not too aggressive with lower visibilities, have maintained a 2SM IFR tempo and MIFG in the KRFD TAF, and will monitor overnight for tactical lower vsbys. The drier low-level airmass to the southeast looks to be less conducive to fog development with southeastward extent. Have maintained a 3SM MIFG tempo at DPA, with VFR conditions for the other Chicago area terminals.

Ratzer

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.