Lake Barrington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Barrington, a village in Mchenry County, Illinois.
This Afternoon
63°F
Slight Chance Rain Showers
A slight chance of drizzle before 1pm, then a slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 63, with temperatures falling to around 56 in the afternoon. West southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Lake Barrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Slight Chance Rain Showers | 15 mph WSW | 7% |
| Tonight | 45°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph SW | 13% |
| Thursday | 55°F | Rain Likely | 10 to 15 mph W | 65% |
| Thursday Night | 37°F | Chance Rain then Cloudy | 10 mph NNW | 43% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph NNW | 2% |
| Friday Night | 33°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 60°F | Sunny | 0 to 10 mph WSW | 0% |
| Monday Night | 39°F | Partly Cloudy | 5 mph WSW | 1% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov) for Lake Barrington (42.210, -88.169). Updated through the day.
Growing snapshot for Lake Barrington
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
5b
More local growing data for Lake Barrington: nearby ZIP 60021 weather · frost dates · planting calendar · Illinois frost dates
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Lake in the Hills
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Climate data from the nearest NOAA station, Barrington 3Sw, Il (6.1 mi from Lake Barrington). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.