Bannockburn, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bannockburn, a village in Lake County, Illinois.
Overnight
62°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 4am, then showers and thunderstorms. Cloudy. Low around 62, with temperatures rising to around 64 overnight. East southeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Bannockburn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Showers And Thunderstorms Likely | 10 to 15 mph ESE | 84% |
| Saturday | 75°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SSE | 100% |
| Saturday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph E | 94% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 10 to 20 mph NNE | 57% |
| Sunday Night | 55°F | Slight Chance Rain Showers | 15 to 20 mph NE | 15% |
| Monday | 65°F | Slight Chance Rain Showers | 15 to 20 mph ENE | 20% |
| Monday Night | 52°F | Mostly Cloudy | 15 mph ENE | 11% |
| Tuesday | 63°F | Mostly Cloudy | 15 mph NE | 11% |
| Tuesday Night | 52°F | Mostly Cloudy | 10 to 15 mph NE | 8% |
| Wednesday | 64°F | Partly Sunny | 10 to 15 mph NE | 14% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 53°F | Mostly Cloudy | 5 mph NNE | 3% |
| Friday | 69°F | Partly Sunny | 5 to 10 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Bannockburn (42.192, -87.870). Updated through the day.
Growing snapshot for Bannockburn
Last spring frost
Apr 19
First fall frost
Oct 26
Growing season
190 days
Hardiness zone
6a
More local growing data for Bannockburn: nearby ZIP 60015 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chicago Palwaukee Ap, Il (3.9 mi from Bannockburn). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.