Frankfort, IL Weather

Will County6:08 PM CDT41.50°N, 87.85°WElevation 761 ft

Current conditions

Clear
70°
Clear
Feels like 70°
High 72° Saturday·Low 48° tonight
WindSSE 5 mph
Humidity40%
Dew point45°
Pressure30.29 inHg
Visibility10.0 mi
Cloud cover18%
UV index0 Low
Sunrise7:13 AM
Sunset6:00 PM

Observed at Lewis University Airport · 1 hr ago

Forecast

10-day

  • Friday Night

    Mostly clear, with a low around 48.

  • Saturday

    Mostly sunny, with a high near 72.

  • Saturday Night

    Partly cloudy, with a low around 51.

National Weather Service forecast updated 2 days ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 66°
  2. 7 PM Mostly Clear 61°
  3. 8 PM Mostly Clear 58°
  4. 9 PM Mostly Clear 57°
  5. 10 PM Mostly Clear 56°
  6. 11 PM Mostly Clear 55°
  7. Sat12 AM Mostly Clear 54°
  8. 1 AM Partly Cloudy 53°
  9. 2 AM Partly Cloudy 52°
  10. 3 AM Partly Cloudy 52°
  11. 4 AM Partly Cloudy 51°
  12. 5 AM Partly Cloudy 49°
  13. 6 AM Mostly Sunny 48°
  14. 7 AM Mostly Sunny 49°
  15. 8 AM Mostly Sunny 51°
  16. 9 AM Mostly Sunny 55°
  17. 10 AM Mostly Sunny 59°
  18. 11 AM Mostly Sunny 63°
  19. 12 PM Mostly Sunny 66°
  20. 1 PM Mostly Sunny 69°
  21. 2 PM Mostly Sunny 71°
  22. 3 PM Mostly Sunny 72°
  23. 4 PM Mostly Sunny 71°
  24. 5 PM Mostly Sunny 68°

10-day forecast

Details
  1. WedOct 21 Sunny Sunny47°72°
  2. ThuOct 22 Patchy Fog then Sunny Patchy Fog then Sunny46°73°
  3. TodayOct 23 Sunny Sunny48°72°
  4. SatOct 24 Mostly Sunny Mostly Sunny51°72°
  5. SunOct 25 Partly Sunny Partly Sunny52°74°
  6. MonOct 26 Partly Sunny Partly Sunny17%49°67°
  7. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers17%42°59°
  8. WedOct 28 Cloudy Cloudy49°65°
  9. ThuOct 29 Heavy rain Heavy rain0.39 in40°64°
  10. FriOct 30 Sunny Sunny36°56°

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 Frankfort

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Air quality

63
Moderate
Fine particles (PM2.5)

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

Forecast

  • FriModerate
  • SatModerate
  • SunModerate

South and West Suburbs (Chicago), IL reporting area · 2 hrs 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 46 min (−2 min 36 s tomorrow)
Waxing Gibbous · 94% lit
Moonrise 4:28 PM Moonset 4:20 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Record high85° (1963)
Record low24° (1917)
Wettest1.20 in (1957)
Month to date0.67 in (normal 0.00 in)

Joliet, records since 1893. 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.