Lake Barrington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Barrington, a village in Mchenry County, Illinois.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. South southwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Lake Barrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 10 mph SSW | 1% |
| Tonight | 67°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 49% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 5 mph WSW | 74% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 0 to 5 mph WNW | 82% |
| Thursday | 78°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 55% |
| Thursday Night | 60°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph NE | 16% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SSE | 3% |
| Friday Night | 63°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 83°F | Mostly Sunny | 0 to 5 mph SW | 11% |
| Saturday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 21% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Monday | 83°F | Chance Showers And Thunderstorms | 5 mph SSW | 45% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 mph W | 46% |
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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Chemung
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Hartland
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Hebron
Huntley
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Lake in the Hills
Lakemoor
Lakewood
Lawrence
Marengo
McCullom Lake
McHenry
Oakwood Hills
Prairie Grove
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Ridgefield
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Spring Grove
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 Aug 4, 2026.