Lake Barrington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Barrington, a village in Mchenry County, Illinois.
Overnight
62°F
Patchy Fog
Patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. 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 Lake Barrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Patchy Fog | 5 to 10 mph NE | 100% |
| Sunday | 65°F | Patchy Fog | 10 to 15 mph NE | 91% |
| Sunday Night | 54°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 35% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph ENE | 30% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph ENE | 30% |
| Tuesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Wednesday | 63°F | Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Wednesday Night | 51°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 NNE | 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 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
Nearby towns & communities
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Lake in the Hills
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McCullom Lake
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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 Sep 20, 2026.