Bourbonnais, IL Weather

Kankakee County5:57 PM CDT41.15°N, 87.89°WElevation 650 ft

Current conditions

Clear
72°
Clear
Feels like 71°
High 74°·Low 45°
WindCalm
Humidity39%
Dew point46°
Pressure30.28 inHg
Visibility10.0 mi
Cloud cover14%
UV index0 Low
Sunrise7:13 AM
Sunset6:00 PM

Observed at Joliet Regional Airport · 1 hr ago

Forecast

10-day

  • This Afternoon

    Sunny. High near 74, with temperatures falling to around 72 in the afternoon. Southeast wind around 5 mph.

  • Tonight

    Patchy fog after 3am. Mostly clear, with a low around 45. Southeast wind 0 to 5 mph.

  • Saturday

    Patchy fog before 9am. Mostly sunny. High near 74, with temperatures falling to around 72 in the afternoon. South southeast wind 0 to 10 mph.

National Weather Service forecast updated 3 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 72°
  2. 6 PM Mostly Clear 67°
  3. 7 PM Mostly Clear 61°
  4. 8 PM Mostly Clear 58°
  5. 9 PM Mostly Clear 56°
  6. 10 PM Mostly Clear 54°
  7. 11 PM Mostly Clear 52°
  8. Sat12 AM Mostly Clear 51°
  9. 1 AM Mostly Clear 50°
  10. 2 AM Mostly Clear 49°
  11. 3 AM Patchy Fog 48°
  12. 4 AM Patchy Fog 47°
  13. 5 AM Patchy Fog 46°
  14. 6 AM Patchy Fog 46°
  15. 7 AM Patchy Fog 45°
  16. 8 AM Patchy Fog 47°
  17. 9 AM Mostly Sunny 54°
  18. 10 AM Mostly Sunny 60°
  19. 11 AM Mostly Sunny 64°
  20. 12 PM Mostly Sunny 68°
  21. 1 PM Mostly Sunny 72°
  22. 2 PM Mostly Sunny 73°
  23. 3 PM Mostly Sunny 74°
  24. 4 PM Mostly Sunny 74°

10-day forecast

Details
  1. TodayOct 23 Sunny Sunny45°74°
  2. SatOct 24 Patchy Fog then Mostly Sunny Patchy Fog then Mostly Sunny46°74°
  3. SunOct 25 Mostly Sunny Mostly Sunny48°77°
  4. MonOct 26 Partly Sunny Partly Sunny48°71°
  5. TueOct 27 Partly Sunny Partly Sunny49°70°
  6. WedOct 28 Mostly Sunny Mostly Sunny51°74°
  7. ThuOct 29 Mostly Sunny Mostly Sunny12%44°72°
  8. FriOct 30 Sunny Sunny38°56°
  9. SatOct 31 Partly cloudy Partly cloudy35°58°
  10. SunNov 1 Light rain Light rain0.04 in54°65°

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
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Air quality

51
Moderate
Ozone

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

Forecast

  • FriModerate
  • SatModerate
  • SunModerate

Joliet and Will 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 7:13 AM
Sunset 6:00 PM
Daylight 10 h 47 min (−2 min 34 s tomorrow)
Waxing Gibbous · 94% lit
Moonrise 4:28 PM Moonset 4:20 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low62° / 41°
Record high80° (2020)
Record low24° (1976)
Wettest2.50 in (2009)
Month to date1.61 in (normal 2.36 in)

Kankakee Wwtp, records since 1887. 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 4Conservative index and reflects what the press published. Terms of use.