Naperville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Naperville, a city in Dupage County, Illinois.
This Afternoon
72°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy, with a high near 72. Southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Naperville
| 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 SSE | 100% |
| Sunday | 68°F | Showers And Thunderstorms | 10 to 15 mph NE | 84% |
| Sunday Night | 57°F | Chance Rain Showers | 15 mph ENE | 28% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 42% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 29% |
| 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 | Partly Sunny | 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 | 8% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Naperville (41.749, -88.162). Updated through the day.
Growing snapshot for Naperville
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
5b
More local growing data for Naperville: nearby ZIP 60540 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (5 mi from Naperville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.