Hartland, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartland, a community in Mchenry County, Illinois.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Hartland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 10 mph SW | 1% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 70% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph W | 74% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 0 to 5 mph WSW | 73% |
| Thursday | 78°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph NE | 44% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NE | 14% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SSE | 3% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SSW | 7% |
| Saturday | 83°F | Mostly Sunny | 0 to 10 mph SW | 11% |
| Saturday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 22% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 44% |
| Monday | 83°F | Chance Rain Showers | 5 mph SSW | 44% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 mph WNW | 44% |
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
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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 Aug 4, 2026.