Port Barrington, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Port Barrington, IL in one place.
Showers and thunderstorms likely before 4am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 61, with temperatures rising to around 64 overnight. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Local Weather Overview
This forecast page for Port Barrington, 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: Sep 19, 2026 3:51 AM CDT.
The active forecast window currently covers Sep 19 to Sep 25, 2026 for Port Barrington, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 19 to Sep 25, 2026
- Latest sync
- Sep 19, 2026 3:51 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Barrington
Saturday looks like the warmest upcoming period in Port Barrington at 75 degrees F.
Monday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Sunday at about 10 to 15 mph NNE.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 19, 2026 3:51 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before noon, then showers and thunderstorms likely between noon and 3pm, then showers and thunderstorms likely. Some of the storms could produce heavy rain. Cloudy, with a high near 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms likely before 7pm, then showers and thunderstorms likely between 7pm and 8pm, then showers and thunderstorms between 8pm and 3am, then showers and thunderstorms likely between 3am and 4am, then showers and thunderstorms likely. Cloudy. Low around 61, with temperatures rising to around 63 overnight. East northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms likely. Mostly cloudy, with a high near 68. North northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
A slight chance of rain showers. Mostly cloudy, with a low around 54. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
A chance of rain showers. Cloudy, with a high near 62. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 50.
Mostly cloudy, with a high near 61.
Mostly cloudy, with a low around 50.
Partly sunny, with a high near 63.
Mostly cloudy, with a low around 51.
Partly sunny, with a high near 65.
Mostly cloudy, with a low around 51.
Mostly sunny, with a high near 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 19
|
Showers And Thunderstorms Likely
|
61°F |
10 mph
ESE
|
|
Saturday
Sep 19
|
Showers And Thunderstorms then Showers And Thunderstorms Likely
|
75°F |
5 to 10 mph
SSE
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms
|
61°F |
5 to 10 mph
ENE
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
68°F |
10 to 15 mph
NNE
|
|
Sunday Night
Sep 20
|
Slight Chance Rain Showers
|
54°F |
15 mph
NE
|
|
Monday
Sep 21
|
Chance Rain Showers
|
62°F |
15 mph
ENE
|
|
Monday Night
Sep 21
|
Slight Chance Rain Showers then Mostly Cloudy
|
50°F |
10 to 15 mph
ENE
|
|
Tuesday
Sep 22
|
Mostly Cloudy
|
61°F |
10 to 15 mph
NE
|
|
Tuesday Night
Sep 22
|
Mostly Cloudy
|
50°F |
5 to 10 mph
NE
|
|
Wednesday
Sep 23
|
Partly Sunny
|
63°F |
5 to 10 mph
NE
|
|
Wednesday Night
Sep 23
|
Mostly Cloudy
|
51°F |
0 to 5 mph
NNE
|
|
Thursday
Sep 24
|
Partly Sunny
|
65°F |
5 mph
NNE
|
|
Thursday Night
Sep 24
|
Mostly Cloudy
|
51°F |
0 to 5 mph
NNE
|
|
Friday
Sep 25
|
Mostly Sunny
|
69°F |
0 to 5 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Barrington.