Pearl City, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Pearl City, a village in Stephenson County, Illinois.

Overnight

61°F

Mostly Clear

Mostly clear, with a low around 61. South wind around 5 mph.

7-day forecast for Pearl City

When	Temp	Forecast	Wind	Precip
Overnight	61°F	Mostly Clear	5 mph S	0%
Tuesday	84°F	Mostly Sunny then Slight Chance Showers And Thunderstorms	5 to 10 mph SW	18%
Tuesday Night	65°F	Showers And Thunderstorms Likely	5 mph W	75%
Wednesday	74°F	Showers And Thunderstorms Likely	0 to 5 mph N	73%
Wednesday Night	59°F	Showers And Thunderstorms Likely	0 to 5 mph NW	62%
Thursday	78°F	Chance Rain Showers then Mostly Sunny	0 to 5 mph NE	25%
Thursday Night	58°F	Mostly Clear	0 mph	6%
Friday	80°F	Mostly Sunny	0 to 5 mph SE	5%
Friday Night	63°F	Mostly Clear	5 mph S	7%
Saturday	83°F	Mostly Sunny	5 to 10 mph SW	11%
Saturday Night	68°F	Partly Cloudy then Slight Chance Showers And Thunderstorms	5 to 10 mph S	23%
Sunday	84°F	Slight Chance Showers And Thunderstorms	10 to 15 mph SW	23%
Sunday Night	68°F	Chance Showers And Thunderstorms	5 to 10 mph SW	42%
Monday	83°F	Chance Showers And Thunderstorms	5 to 10 mph S	39%

Forecast source: National Weather Service (api.weather.gov) for Pearl City (42.266, -89.827). Updated through the day.

Growing snapshot for Pearl City

Last spring frost

Apr 26

First fall frost

Oct 13

Growing season

169 days

Hardiness zone

More local growing data for Pearl City: nearby ZIP 61062 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Adeline Cedarville Dakota Davis Freeport German Valley Lake Summerset Lena Orangeville Ridott Rock City Willow Lake Winslow

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Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (12.3 mi from Pearl City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.