Freeport, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Freeport, a city in Stephenson County, Illinois.
This Afternoon
59°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. High near 59, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast for Freeport
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Slight Chance Rain Showers | 15 mph SW | 18% |
| Tonight | 46°F | Chance Rain Showers | 10 to 15 mph SW | 27% |
| Thursday | 51°F | Chance Rain Showers | 10 to 15 mph NW | 39% |
| Thursday Night | 35°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 18% |
| Friday | 48°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Friday Night | 27°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 33°F | Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 0 to 5 mph NW | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph NW | 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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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 5, 2026.