Northbrook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Northbrook, a village in Cook County, Illinois.
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 72, with temperatures falling to around 69 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Northbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 15 mph S | 36% |
| Tonight | 60°F | Rain Showers | 15 mph S | 76% |
| Wednesday | 64°F | Rain Showers Likely | 15 mph SSW | 58% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 18% |
| Thursday | 57°F | Chance Rain Showers | 10 to 15 mph WSW | 31% |
| Thursday Night | 42°F | Rain Showers Likely | 5 to 10 mph WNW | 60% |
| Friday | 53°F | Chance Rain Showers | 10 to 15 mph N | 37% |
| Friday Night | 38°F | Slight Chance Rain then Mostly Cloudy | 5 to 10 mph NNW | 15% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 10% |
| Saturday Night | 37°F | Partly Cloudy | 0 to 5 mph WSW | 7% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 17% |
| Sunday Night | 38°F | Mostly Clear | 5 mph WNW | 10% |
| Monday | 59°F | Mostly Sunny | 5 to 10 mph W | 6% |
| Monday Night | 42°F | Partly Cloudy | 5 to 10 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov) for Northbrook (42.129, -87.835). Updated through the day.
Growing snapshot for Northbrook
Last spring frost
Apr 19
First fall frost
Oct 26
Growing season
190 days
Hardiness zone
6a
More local growing data for Northbrook: nearby ZIP 60062 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chicago Palwaukee Ap, Il (3.1 mi from Northbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.