Port Barrington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Barrington, a village in Lake County, Illinois.
Tonight
62°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 62, with temperatures rising to around 65 overnight. Northeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Port Barrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph NE | 100% |
| Sunday | 66°F | Showers And Thunderstorms | 10 to 15 mph NE | 86% |
| Sunday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 18% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 35% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph ENE | 31% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph ENE | 31% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Wednesday | 63°F | Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Wednesday Night | 50°F | Mostly Cloudy | 0 to 5 mph NE | 5% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph NE | 5% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph NE | 13% |
| Friday | 70°F | Partly Sunny | 0 to 5 mph NE | 11% |
| Friday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Saturday | 72°F | Mostly Sunny | 0 to 5 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Port Barrington (42.244, -88.195). Updated through the day.
Growing snapshot for Port Barrington
Last spring frost
May 1
First fall frost
Oct 11
Growing season
162 days
Hardiness zone
5b
More local growing data for Port Barrington: nearby ZIP 60042 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Antioch
Bannockburn
Beach Park
Buffalo Grove
Burtons Bridge
Deer Park
Deerfield
Forest Lake
Fox Lake
Fox Lake Hills
Gages Lake
Grandwood Park
Grayslake
Green Oaks
Gurnee
Hainesville
Hawthorn Woods
Highland Park
Highwood
Holiday Hills
Indian Creek
Island Lake
Kildeer
Knollwood
Lake Bluff
Lake Forest
Lake Villa
Lake Zurich
Libertyville
Lincolnshire
Climate data from the nearest NOAA station, Mc Henry -Wg Stratton L&D, Il (3.6 mi from Port Barrington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.