Naperville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Naperville, a city in Dupage County, Illinois.
Tonight
59°F
Rain
Rain. Cloudy. Low around 59, with temperatures rising to around 62 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Naperville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Rain | 15 mph S | 89% |
| Wednesday | 63°F | Chance Rain then Rain Showers Likely | 15 mph SSW | 56% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 15% |
| Thursday | 57°F | Chance Rain Showers | 10 to 15 mph WSW | 28% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph WNW | 36% |
| Friday | 53°F | Slight Chance Rain Showers | 10 to 15 mph N | 24% |
| Friday Night | 37°F | Partly Cloudy | 5 to 10 mph NNW | 7% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 7% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph WSW | 3% |
| Sunday | 57°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph WNW | 8% |
| Monday | 61°F | Sunny | 5 to 10 mph WSW | 3% |
| Monday Night | 41°F | Mostly Clear | 5 to 10 mph WSW | 2% |
| Tuesday | 62°F | Mostly Sunny | 5 to 10 mph WNW | 1% |
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
Nearby towns & communities
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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 Nov 4, 2026.