Naperville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Naperville, a city in Dupage County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind around 10 mph.
7-day forecast for Naperville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 10 mph SSW | 0% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSW | 27% |
| Wednesday | 80°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph SW | 70% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph WNW | 89% |
| Thursday | 79°F | Rain Showers Likely then Chance Showers And Thunderstorms | 0 to 5 mph ESE | 69% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 26% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph S | 5% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph SSW | 9% |
| Saturday | 84°F | Mostly Sunny | 5 to 10 mph SSW | 11% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 18% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 18% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 39% |
| Monday | 85°F | Chance Rain Showers | 5 to 10 mph SSW | 39% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 44% |
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 Aug 4, 2026.