Zion, IL Weather

Lake County5:58 PM CDT42.45°N, 87.83°WElevation 650 ft

Current conditions

Sunny
62°
Sunny
Feels like 62°
High 65°·Low 51°
WindSE 10 mph
Humidity72%
Dew point53°
Cloud cover23%
UV index0 Low
Sunrise7:14 AM
Sunset5:58 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Friday

    Mostly sunny, with a high near 65. Southeast wind 0 to 10 mph.

  • Friday Night

    Partly cloudy, with a low around 51.

  • Saturday

    Mostly sunny, with a high near 67.

National Weather Service forecast updated 2 days ago.

Hourly

Hourly forecast
  1. Now Sunny 62°
  2. 6 PM Partly Cloudy 61°
  3. 7 PM Partly Cloudy 58°
  4. 8 PM Partly Cloudy 57°
  5. 9 PM Partly Cloudy 57°
  6. 10 PM Partly Cloudy 57°
  7. 11 PM Partly Cloudy 56°
  8. Sat12 AM Partly Cloudy 56°
  9. 1 AM Partly Cloudy 56°
  10. 2 AM Partly Cloudy 55°
  11. 3 AM Partly Cloudy 54°
  12. 4 AM Partly Cloudy 53°
  13. 5 AM Partly Cloudy 52°
  14. 6 AM Mostly Sunny 51°
  15. 7 AM Mostly Sunny 51°
  16. 8 AM Mostly Sunny 53°
  17. 9 AM Mostly Sunny 56°
  18. 10 AM Mostly Sunny 59°
  19. 11 AM Mostly Sunny 62°
  20. 12 PM Mostly Sunny 64°
  21. 1 PM Mostly Sunny 66°
  22. 2 PM Mostly Sunny 67°
  23. 3 PM Mostly Sunny 67°
  24. 4 PM Partly Sunny 66°

10-day forecast

Details
  1. WedOct 21 Sunny Sunny47°66°
  2. ThuOct 22 Patchy Fog then Sunny Patchy Fog then Sunny48°65°
  3. TodayOct 23 Mostly Sunny Mostly Sunny51°65°
  4. SatOct 24 Mostly Sunny Mostly Sunny52°67°
  5. SunOct 25 Partly Sunny Partly Sunny50°69°
  6. MonOct 26 Partly Sunny Partly Sunny26%46°62°
  7. TueOct 27 Chance Rain Showers Chance Rain Showers26%44°58°
  8. WedOct 28 Cloudy Cloudy0.35 in49°63°
  9. ThuOct 29 Rain Rain0.62 in40°59°
  10. FriOct 30 Sunny Sunny38°55°

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

Radar

Full map
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Weather news near Zion

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Air quality

54
Moderate
Ozone

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

Forecast

  • FriModerate
  • SatModerate
  • SunModerate

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 7:14 AM
Sunset 5:58 PM
Daylight 10 h 44 min (−2 min 41 s tomorrow)
Waxing Gibbous · 94% lit
Moonrise 4:27 PM Moonset 4:20 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low56° / 40°
Month to date2.38 in (normal 2.20 in)

Racine Wwtp, records since 1896. 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

- Precipitation free, unseasonably warm weather will continue through this weekend, with temperatures continuing to generally run above average through next week.

- Chances for any meaningful rainfall are low through next workweek.

Discussion

Issued at 150 PM CDT Fri Oct 23 2026

Tonight through Sunday:

As of this writing, what had been a bank of extensive fog and very low clouds across Chicago's far northern suburbs this morning has finally contracted to a remaining patch near Winthrop Harbor, IL. With lake enhanced moisture evident in the Waukegan and southeast WI dew point obs, wouldn't be surprised if patchy fog sneaks back into northeastern Lake County this evening from continued light to moderate southeasterly boundary layer flow.

Another calm night is in store tonight, with the main change happening aloft in terms of strengthening southerly flow just above the nocturnal inversion. Over the southeast half or third of the area (I-88 corridor in interior Chicago metro and points southeast), flow aloft should be sufficiently weak to enable patchy shallow ground fog development. Can't completely rule out very localized dense fog, but the setup isn't nearly as favorable as this (Friday) morning. High clouds will filter in from the northwest overnight into Saturday morning, keeping overnight lows a bit milder across interior northern Illinois in particular.

On Saturday, high temperatures will likely be close to a carbon copy of today (Friday), in the lower to mid 70s. Illinois side lake cooling will be confined to the immediate shoreline during the afternoon as southerly winds back to southeast with lake influence. Following a calm and cool (relative to Saturday afternoon's warmth) Saturday night, Sunday will likely be the warmest day of this stretch unless mid and high cloud cover limits high temps a bit.

Sunday Night through Friday:

Aviation

Issued at 1247 PM CDT Fri Oct 23 2026

VFR conditions are currently forecast through the period. Patchy shallow fog can't be ruled out in low-lying and grassy areas outside of Chicago early Saturday morning, though the potential remains too low to include in the TAFs with this update.

Winds will remain light through tonight initially out of the SSE then turning E to ESE behind a weak lake breeze this afternoon (ENE at GYY). Occasional patches of VFR high clouds may drift through this evening and overnight with greater coverage expected Saturday morning. Winds also begin to turn SSE to S by mid-morning Saturday and increase to around 10 kt.

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.