Willow Lake, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Willow Lake, a community in Stephenson County, Illinois.
Overnight
53°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 53, with temperatures rising to around 57 overnight. South wind 10 to 15 mph. Chance of precipitation is 30%.
7-day forecast for Willow Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Chance Rain Showers | 10 to 15 mph S | 33% |
| Wednesday | 59°F | Chance Rain Showers | 15 mph SW | 47% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 26% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph W | 59% |
| Thursday Night | 37°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 15% |
| Friday | 48°F | Partly Sunny | 5 to 15 mph N | 3% |
| Friday Night | 28°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Willow Lake (42.334, -89.635). Updated through the day.
Growing snapshot for Willow Lake
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
More local growing data for Willow Lake: nearby ZIP 61032 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adeline
Cedarville
Dakota
Davis
Freeport
German Valley
Lake Summerset
Lena
Orangeville
Pearl City
Ridott
Rock City
Winslow
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (2.3 mi from Willow Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.