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Pontiac, IL Weather
Current conditions
Observed at Pontiac Municipal Airport · 1 hr ago
Forecast
10-day-
Tonight
Mostly clear, with a low around 46. Southeast wind around 5 mph.
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Saturday
Mostly sunny, with a high near 75. South southeast wind 5 to 10 mph.
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Saturday Night
Partly cloudy, with a low around 47. South southeast wind 0 to 5 mph.
National Weather Service forecast updated 7 hrs ago.
Hourly
Hourly forecast- Now55°
- 11 PM53°
- Sat12 AM52°
- 1 AM51°
- 2 AM50°
- 3 AM49°
- 4 AM48°
- 5 AM47°
- 6 AM46°
- 7 AM46°
- 8 AM48°
- 9 AM55°
- 10 AM62°
- 11 AM66°
- 12 PM70°
- 1 PM73°
- 2 PM75°
- 3 PM75°
- 4 PM75°
- 5 PM74°
- 6 PM69°
- 7 PM63°
- 8 PM59°
- 9 PM57°
10-day forecast
Details- TonightOct 23Mostly Clear46°
- SatOct 24Mostly Sunny47°75°
- SunOct 25Mostly Sunny49°78°
- MonOct 26Partly Sunny48°74°
- TueOct 27Partly Sunny49°72°
- WedOct 28Mostly Sunny51°75°
- ThuOct 29Mostly Sunny15%44°73°
- FriOct 30Slight Chance Rain Showers15%68°
- SatOct 31Cloudy58°76°
- SunNov 1Heavy rain1.33 in62°71°
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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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- FriModerate
- SatModerate
- SunModerate
Bloomington and Normal, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
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 631 PM CDT Fri Oct 23 2026
No significant aviation forecast concerns through the period.
Surface high pressure ridge continues to move off to the east of the region early this evening, while a slow-moving cold front remains well to our west across the Plains. Locally, this will maintain a south-southeast surface wind regime tonight through Saturday. Afternoon lake breeze had pushed through ORD/MDW and GYY earlier but is now decaying after sunset. Light southeast winds overnight will turn more south or south- southeast near 10 kts on Saturday before becoming light southeast again with sunset.
VFR conditions will prevail, with only some increasing mid and high level cloud cover tonight/Saturday (bases above 15 kft).
Ratzer
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.