Wilmette, IL Weather & Growing Conditions
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 72, with temperatures falling to around 68 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 15 to 20 mph S | 31% |
| Tonight | 60°F | Rain Showers Likely | 15 mph S | 72% |
| Wednesday | 64°F | Rain Showers Likely | 15 mph SSW | 67% |
| Wednesday Night | 49°F | Mostly Cloudy | 15 mph SW | 13% |
| Thursday | 56°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph WSW | 28% |
| Thursday Night | 44°F | Rain Showers Likely | 5 to 15 mph WNW | 60% |
| Friday | 52°F | Chance Rain Showers | 15 mph N | 43% |
| Friday Night | 40°F | Slight Chance Rain then Mostly Cloudy | 5 to 15 mph N | 19% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 11% |
| Saturday Night | 38°F | Partly Cloudy | 5 mph WSW | 7% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 17% |
| Sunday Night | 40°F | Mostly Clear | 5 to 10 mph WNW | 12% |
| Monday | 58°F | Sunny | 5 to 10 mph WSW | 8% |
| Monday Night | 44°F | Mostly Clear | 5 to 10 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Wilmette, IL
Last spring frost
Apr 26
First fall frost
Oct 21
Growing season
176 days
Hardiness zone
6a
Explore more for Wilmette, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Chicago Botanic Garden, Il (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.