Arlington Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arlington Heights, a village in Cook County, Illinois.
This Afternoon
64°F
Slight Chance Rain Showers
A slight chance of drizzle before 1pm, then a slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 64, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Arlington Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Slight Chance Rain Showers | 15 mph SW | 9% |
| Tonight | 46°F | Slight Chance Rain | 10 to 15 mph SW | 17% |
| Thursday | 55°F | Rain Likely | 10 to 15 mph W | 61% |
| Thursday Night | 39°F | Chance Rain then Cloudy | 10 mph NNW | 53% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph NNW | 4% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NNW | 1% |
| Saturday | 51°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 1% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 41°F | Partly Cloudy | 5 mph WSW | 1% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 to 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Arlington Heights (42.097, -87.982). Updated through the day.
Growing snapshot for Arlington Heights
Last spring frost
Apr 19
First fall frost
Oct 26
Growing season
190 days
Hardiness zone
6a
More local growing data for Arlington Heights: nearby ZIP 60004 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chicago Palwaukee Ap, Il (3.9 mi from Arlington Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.