Lockport, IL Weather

Will County3:31 PM CDT41.59°N, 88.06°WElevation 594 ft

Current conditions

Sunny
71°
Sunny
Feels like 71°
High 72°·Low 47°
WindCalm
Humidity40%
Dew point45°
Cloud cover3%
UV index2 Low
Sunrise7:12 AM
Sunset6:03 PM

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

Forecast

10-day

  • This Afternoon

    Sunny. High near 72, with temperatures falling to around 70 in the afternoon. Southwest wind around 0 mph.

  • Tonight

    Patchy fog after 3am. Mostly clear, with a low around 47. East southeast wind around 0 mph.

  • Thursday

    Patchy fog before 9am. Sunny. High near 73, with temperatures falling to around 71 in the afternoon. North northeast wind 0 to 5 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 71°
  2. 4 PM Sunny 71°
  3. 5 PM Sunny 70°
  4. 6 PM Mostly Clear 67°
  5. 7 PM Mostly Clear 61°
  6. 8 PM Mostly Clear 59°
  7. 9 PM Mostly Clear 57°
  8. 10 PM Mostly Clear 54°
  9. 11 PM Clear 52°
  10. Thu12 AM Clear 50°
  11. 1 AM Clear 49°
  12. 2 AM Clear 49°
  13. 3 AM Patchy Fog 48°
  14. 4 AM Patchy Fog 47°
  15. 5 AM Patchy Fog 47°
  16. 6 AM Patchy Fog 47°
  17. 7 AM Patchy Fog 47°
  18. 8 AM Patchy Fog 49°
  19. 9 AM Sunny 53°
  20. 10 AM Sunny 61°
  21. 11 AM Sunny 65°
  22. 12 PM Sunny 70°
  23. 1 PM Sunny 72°
  24. 2 PM Sunny 73°

Daily forecast

Details
  1. TodayOct 21 Sunny Sunny47°72°
  2. ThuOct 22 Patchy Fog then Sunny Patchy Fog then Sunny47°73°
  3. FriOct 23 Sunny Sunny49°72°
  4. SatOct 24 Mostly Sunny Mostly Sunny50°72°
  5. SunOct 25 Partly Sunny Partly Sunny51°74°
  6. MonOct 26 Partly Sunny Partly Sunny50°70°
  7. TueOct 27 Partly Sunny Partly Sunny13%46°64°
  8. WedOct 28 Sunny Sunny37°51°
  9. ThuOct 29 Cloudy Cloudy33°53°

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 Lockport

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Air quality

61
Moderate
Fine particles (PM2.5)

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

Forecast

  • WedModerate
  • ThuModerate
  • FriModerate

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 7:12 AM
Sunset 6:03 PM
Daylight 10 h 51 min (−2 min 37 s tomorrow)
Waxing Gibbous · 80% lit
Moonrise 3:46 PM Moonset 2:10 AM
Full moon Oct 26 New moon Nov 9

Nearby

Forecasters' discussion

From the National Weather Service office in LOT, issued 3 hrs ago

Key Messages

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

Discussion

Issued at 157 AM CDT Wed Oct 21 2026

GOES nighttime microphysics RGB shows fog developing across Lake County IL into extreme southeast WI. Given the fog is developing a couple hours earlier than last night and with similarly favorable conditions to early Tuesday morning, seems likely that dense fog will continue to develop and expand through sunrise. The northern and northwest suburbs seem most likely for dense fog development, but given the low dewpoint depressions, calm winds, and clear skies, fog will probably expand south into the heart of the metro too, though confidence is low in how far south it develops. A dense fog advisory will likely be issued sooner rather than later and will probably need to be expanded as fog expands. Similar to Tuesday morning, fog should burn off by around 14z.

Very little day to day change in the weather is expected through the upcoming weekend. A very weak southwest gradient today may limit the inland penetration of the lake breeze this afternoon compared to Tuesday. This would have implications on areal coverage of fog tonight, as the added moisture from the marine layer has been contributing to the fog development. Temperatures will likely be a couple degrees warmer today.

Another weak surface high will track across the upper Great Lakes in SE Canada Thursday into Friday, likely resulting in a very weak easterly gradient favoring a deeper inland penetration of the weak lake breeze Thursday and possibly Friday as well. This could tee things up for a bit more areal coverage of dense fog Fri and Sat morning.

The omega block and the amplitude of the upper ridge is still progged to break down early next week which at least opens the door to the possibility of a cold frontal passage and perhaps some rain at some point early next week. Medium range guidance often struggles with the breaking down of blocking patterns and there is still considerable ensemble spread, so the magnitude and timing of any potential return to more seasonable temperatures is still a low confidence item. As is any potential increase in rain chances.

- Izzi

Aviation

Issued at 1217 PM CDT Wed Oct 21 2026

Expect generally VFR conditions with a few mid-level clouds through the period as high pressure drifts over the area. However, as has been observed during the past few mornings, MIFG/BCFG is likely at RFD/DPA and VFR BR is possible at ORD late tonight through sunrise Thursday.

Light SW winds are expected this afternoon, though a weak lake breeze may wash out and turn winds SE 5 knots or less over ORD and especially MDW toward sunset. Winds will become calm or light and VRB tonight into Thursday morning, with a lake- enhanced NE wind shift likely by Thursday afternoon.

Kluber

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.