Freeport, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Freeport, a city in Stephenson County, Illinois.
Tonight
54°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 54, with temperatures rising to around 57 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
7-day forecast for Freeport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Showers And Thunderstorms | 15 mph S | 91% |
| Wednesday | 57°F | Rain Showers Likely | 15 mph SW | 58% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph SW | 29% |
| Thursday | 53°F | Rain Showers Likely | 10 to 15 mph W | 58% |
| Thursday Night | 39°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 28% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 13% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 33°F | Mostly Clear | 5 mph W | 4% |
| Monday | 60°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Freeport (42.289, -89.634). Updated through the day.
Growing snapshot for Freeport
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
More local growing data for Freeport: nearby ZIP 61032 weather · frost dates · planting calendar · Illinois frost dates
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Winslow
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (2.3 mi from Freeport). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.