Pontiac, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Pontiac, IL in one place.
Mostly cloudy, with a low around 61. East wind around 2 mph.
Local Weather Overview
This forecast page for Pontiac, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 26, 2026 4:32 AM CDT.
The active forecast window currently covers May 26 to Jun 1, 2026 for Pontiac, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 26 to Jun 1, 2026
- Latest sync
- May 26, 2026 4:32 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Pontiac
Thursday looks like the warmest upcoming period in Pontiac at 84 degrees F.
Sunday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph NE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- May 26, 2026 4:32 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 80. East wind 3 to 7 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms between 7pm and 8pm, then a chance of showers and thunderstorms between 8pm and 9pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North wind 1 to 6 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Northwest wind 1 to 5 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 65. East wind 1 to 5 mph. Chance of precipitation is 20%.
Partly sunny, with a high near 84.
Mostly cloudy, with a low around 64.
Mostly cloudy, with a high near 79.
Mostly cloudy, with a low around 61.
Partly sunny, with a high near 80.
Partly cloudy, with a low around 61.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 59.
Mostly sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
May 26
|
Mostly Cloudy
|
61°F |
2 mph
E
|
|
Tuesday
May 26
|
Mostly Cloudy then Slight Chance Showers And Thunderstorms
|
80°F |
3 to 7 mph
E
|
|
Tuesday Night
May 26
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
65°F |
1 to 6 mph
N
|
|
Wednesday
May 27
|
Slight Chance Showers And Thunderstorms
|
82°F |
1 to 5 mph
NW
|
|
Wednesday Night
May 27
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
65°F |
1 to 5 mph
E
|
|
Thursday
May 28
|
Partly Sunny
|
84°F |
3 to 9 mph
NE
|
|
Thursday Night
May 28
|
Mostly Cloudy
|
64°F |
8 mph
E
|
|
Friday
May 29
|
Mostly Cloudy
|
79°F |
8 mph
E
|
|
Friday Night
May 29
|
Mostly Cloudy
|
61°F |
7 mph
E
|
|
Saturday
May 30
|
Partly Sunny
|
80°F |
5 to 10 mph
NE
|
|
Saturday Night
May 30
|
Partly Cloudy
|
61°F |
5 to 9 mph
E
|
|
Sunday
May 31
|
Mostly Sunny
|
80°F |
7 to 10 mph
NE
|
|
Sunday Night
May 31
|
Partly Cloudy
|
59°F |
5 to 9 mph
NE
|
|
Monday
Jun 1
|
Mostly Sunny
|
81°F |
5 to 9 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Pontiac.
