Harvey, IL Weather & Growing Conditions
Today
65°F
Slight Chance Drizzle then 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 65, with temperatures falling to around 57 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Slight Chance Drizzle then Slight Chance Rain Showers | 15 mph SW | 10% |
| Tonight | 47°F | Slight Chance Rain | 10 to 15 mph SW | 18% |
| Thursday | 55°F | Mostly Cloudy then Chance Rain | 10 to 15 mph WSW | 49% |
| Thursday Night | 40°F | Rain Likely then Cloudy | 10 mph NNW | 64% |
| Friday | 50°F | Partly Sunny | 10 to 15 mph NNW | 10% |
| Friday Night | 37°F | Partly Cloudy | 5 to 10 mph NNW | 3% |
| Saturday | 52°F | Mostly Sunny | 5 mph NW | 2% |
| Saturday Night | 36°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 2% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 5 mph WSW | 1% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 41°F | Partly Cloudy | 0 to 5 mph WNW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harvey, IL
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
Explore more for Harvey, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Park Forest, Il (8.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.