Harman US

Hillsdale, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Hillsdale, a village in Rock Island County, Illinois.

This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 77 in the afternoon. South wind around 5 mph. Chance of precipitation is 50%.

7-day forecast for Hillsdale

WhenTempForecastWindPrecip
This Afternoon 80°F Chance Showers And Thunderstorms 5 mph S 49%
Tonight 65°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 to 10 mph SE 91%
Sunday 69°F Patchy Fog 10 to 15 mph NE 71%
Sunday Night 57°F Chance Rain Showers 10 to 15 mph NE 43%
Monday 64°F Rain Showers Likely 15 mph NE 66%
Monday Night 52°F Rain Showers Likely 10 to 15 mph NE 64%
Tuesday 63°F Chance Rain Showers 15 mph NE 54%
Tuesday Night 50°F Mostly Cloudy 5 to 15 mph NE 9%
Wednesday 65°F Partly Sunny 10 mph NE 4%
Wednesday Night 52°F Mostly Cloudy 5 to 10 mph NE 4%
Thursday 68°F Partly Sunny 5 mph NE 8%
Thursday Night 54°F Slight Chance Rain Showers 0 to 5 mph NE 15%
Friday 71°F Partly Sunny 5 mph NE 8%
Friday Night 54°F Partly Cloudy 0 to 5 mph NE 7%

Forecast source: National Weather Service (api.weather.gov) for Hillsdale (41.607, -90.173). Updated through the day.

Growing snapshot for Hillsdale

Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
190 days
Hardiness zone
5b

More local growing data for Hillsdale: nearby ZIP 61257 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

All Illinois locations ›

Climate data from the nearest NOAA station, Le Claire L&D 14, Ia (9.3 mi from Hillsdale). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.