Oak Forest, IL Weather

Cook County6:28 AM CDT41.60°N, 87.74°WElevation 673 ft

Current conditions

Fog
39°
Fog
Feels like 39°
High 69°·Low 44°
WindCalm
Humidity100%
Dew point39°
Pressure30.39 inHg
Visibility0.2 mi
Cloud cover18%
UV index0 Low
Sunrise7:09 AM
Sunset6:04 PM

Observed at Lansing Municipal Airport · 53 min ago

Forecast

10-day

  • Tuesday

    Patchy fog before 8am. Sunny. High near 69, with temperatures falling to around 66 in the afternoon. East northeast wind 0 to 10 mph.

  • Tuesday Night

    Patchy fog after 4am. Mostly clear. Low around 44, with temperatures rising to around 46 overnight. East southeast wind 0 to 5 mph.

  • Wednesday

    Patchy fog before 8am. Sunny, with a high near 71. Southwest wind around 0 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Patchy Fog 44°
  2. 7 AM Patchy Fog 43°
  3. 8 AM Sunny 45°
  4. 9 AM Sunny 50°
  5. 10 AM Sunny 56°
  6. 11 AM Sunny 60°
  7. 12 PM Sunny 64°
  8. 1 PM Sunny 67°
  9. 2 PM Sunny 68°
  10. 3 PM Sunny 69°
  11. 4 PM Sunny 69°
  12. 5 PM Sunny 66°
  13. 6 PM Clear 62°
  14. 7 PM Clear 58°
  15. 8 PM Clear 56°
  16. 9 PM Mostly Clear 55°
  17. 10 PM Mostly Clear 54°
  18. 11 PM Mostly Clear 52°
  19. Wed12 AM Partly Cloudy 51°
  20. 1 AM Partly Cloudy 50°
  21. 2 AM Mostly Clear 49°
  22. 3 AM Partly Cloudy 48°
  23. 4 AM Patchy Fog 46°
  24. 5 AM Patchy Fog 46°

10-day forecast

Details
  1. TonightOct 19 Patchy Fog Patchy Fog42°
  2. TodayOct 20 Patchy Fog then Sunny Patchy Fog then Sunny44°69°
  3. WedOct 21 Patchy Fog then Sunny Patchy Fog then Sunny49°71°
  4. ThuOct 22 Sunny Sunny49°71°
  5. FriOct 23 Sunny Sunny48°68°
  6. SatOct 24 Mostly Sunny Mostly Sunny52°69°
  7. SunOct 25 Partly Sunny Partly Sunny52°71°
  8. MonOct 26 Partly Sunny Partly Sunny66°
  9. TueOct 27 Light rain Light rain0.15 in45°55°
  10. WedOct 28 Cloudy Cloudy40°49°

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

Radar

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Weather news near Oak Forest

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Air quality

77
Moderate
Fine particles (PM2.5)

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

Forecast

  • TueModerate
  • WedModerate
  • ThuModerate

South 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

Sunrise 7:09 AM
Sunset 6:04 PM
Daylight 10 h 54 min (−2 min 39 s tomorrow)
Waxing Gibbous · 68% lit
Moonrise 3:22 PM Moonset 1:04 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low62° / 45°
Record high86° (1953)
Record low20° (1930)
Wettest0.86 in (1934)
Month to date2.13 in (normal 2.18 in)

Chicago Midway Ap, records since 1928. 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

- Some ground fog may develop within 10-15 miles of Lake Michigan during early morning hours the next few days. Any fog would then quickly dissipate after sunrise.

- An extended period of dry and above to much above average temperatures is expected through the upcoming weekend.

Discussion

Issued at 154 AM CDT Tue Oct 20 2026

No significant weather is expected through the upcoming weekend 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 only result in slightly cooler conditions right near the lake. A modest increase in moisture in the wake of the afternoon lake breezes could allow for some ground fog to form during the early morning hours the next few days. Otherwise, look for mostly sunny conditions for the remainder of the work week.

- Borchardt/Izzi

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 4Conservative index and reflects what the press published. Terms of use.