Hartland, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartland, a community in Mchenry County, Illinois.
Tonight
58°F
Rain
Rain. Cloudy. Low around 58, with temperatures rising to around 61 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Hartland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Rain | 15 mph S | 85% |
| Wednesday | 61°F | Rain Likely then Chance Rain Showers | 15 mph SSW | 58% |
| Wednesday Night | 46°F | Chance Rain Showers | 15 mph SW | 30% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph WSW | 54% |
| Thursday Night | 40°F | Chance Rain Showers | 5 to 10 mph NW | 50% |
| Friday | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph N | 20% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph NNW | 3% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 33°F | Partly Cloudy | 0 mph | 7% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 18% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 7% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 2% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 2% |
| Tuesday | 61°F | Mostly Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Hartland (42.363, -88.509). Updated through the day.
Growing snapshot for Hartland
Last spring frost
Apr 25
First fall frost
Oct 22
Growing season
179 days
Hardiness zone
5b
More local growing data for Hartland: nearby ZIP 60098 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Lake Barrington
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Marengo
McCullom Lake
McHenry
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Spring Grove
Climate data from the nearest NOAA station, Crystal Lake 4Nw, Il (5.4 mi from Hartland). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.