Glen Ellyn, IL Weather & Growing Conditions
Today
63°F
Scattered Rain Showers then Patchy Drizzle
Scattered rain showers before 9am, then patchy drizzle and isolated rain showers. Mostly cloudy. High near 63, with temperatures falling to around 56 in the afternoon. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Scattered Rain Showers then Patchy Drizzle | 15 mph SSW | 32% |
| Tonight | 48°F | Patchy Drizzle then Mostly Cloudy | 15 mph SW | 13% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph WSW | 35% |
| Thursday Night | 42°F | Chance Rain Showers | 10 mph NW | 51% |
| Friday | 50°F | Partly Sunny | 10 to 15 mph NNW | 12% |
| Friday Night | 36°F | Partly Cloudy | 5 to 10 mph NNW | 1% |
| Saturday | 51°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 59°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 to 10 mph WSW | 1% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 41°F | Partly Cloudy | 0 to 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Glen Ellyn, IL
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
5b
Explore more for Glen Ellyn, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.