Naperville, IL Weather & Growing Conditions
This Afternoon
72°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy, with a high near 72. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Showers And Thunderstorms Likely | 5 mph SE | 72% |
| Tonight | 65°F | Showers And Thunderstorms | 5 mph SE | 100% |
| Sunday | 67°F | Showers And Thunderstorms | 10 to 15 mph NNE | 85% |
| Sunday Night | 57°F | Chance Rain Showers | 15 mph ENE | 27% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 42% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 28% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 16% |
| Wednesday | 64°F | Mostly Cloudy | 10 mph NE | 12% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 6% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 4% |
| Thursday Night | 55°F | Mostly Cloudy | 5 mph NE | 9% |
| Friday | 72°F | Partly Sunny | 5 mph NE | 9% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Naperville, IL
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
5b
Explore more for Naperville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.