Winslow, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winslow, a village in Stephenson County, Illinois.
Today
75°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 75. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Winslow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Showers And Thunderstorms | 5 to 10 mph S | 83% |
| Tonight | 60°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph E | 86% |
| Sunday | 68°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Sunday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Monday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Monday Night | 48°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 65°F | Mostly Sunny | 10 mph NE | 2% |
| Wednesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 5 mph NE | 5% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph E | 4% |
Forecast source: National Weather Service (api.weather.gov) for Winslow (42.493, -89.795). Updated through the day.
Growing snapshot for Winslow
Last spring frost
Apr 27
First fall frost
Oct 9
Growing season
165 days
Hardiness zone
5a
More local growing data for Winslow: nearby ZIP 61089 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Stockton 3 Nne, Il (9.9 mi from Winslow). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.