Harwood Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harwood Heights, a village in Cook County, Illinois.
This Afternoon
69°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy, with a high near 69. East wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Harwood Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms Likely | 5 mph E | 72% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph E | 100% |
| Sunday | 67°F | Showers And Thunderstorms | 10 to 15 mph NNE | 87% |
| Sunday Night | 58°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph ENE | 23% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 35% |
| Monday Night | 55°F | Slight Chance Rain Showers | 10 to 15 mph ENE | 22% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 22% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 18% |
| Wednesday | 63°F | Slight Chance Rain Showers | 10 mph NE | 15% |
| Wednesday Night | 56°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 57°F | Mostly Cloudy | 0 to 5 mph NNE | 12% |
| Friday | 70°F | Partly Sunny | 0 to 10 mph NE | 12% |
| Friday Night | 58°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Harwood Heights (41.966, -87.806). Updated through the day.
Growing snapshot for Harwood Heights
Last spring frost
Apr 16
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
6a
More local growing data for Harwood Heights: nearby ZIP 60706 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chicago Ohare Intl Ap, Il (6.4 mi from Harwood Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.