Harman US

Hillcrest, IL Weather & Growing Conditions

Tonight
62°F
Slight Chance Rain Showers then Chance Showers And Thunderstorms
A slight chance of rain showers before midnight, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Tonight 62°F Slight Chance Rain Showers then Chance Showers And Thunderstorms 10 mph ESE 50%
Saturday 78°F Showers And Thunderstorms Likely 5 to 10 mph SSE 86%
Saturday Night 62°F Showers And Thunderstorms Likely then Showers And Thunderstorms 5 to 10 mph NE 80%
Sunday 68°F Showers And Thunderstorms 10 to 15 mph NE 77%
Sunday Night 53°F Rain Showers Likely 15 mph NE 61%
Monday 65°F Chance Rain Showers 15 mph ENE 49%
Monday Night 49°F Chance Rain Showers 10 to 15 mph NE 35%
Tuesday 63°F Chance Rain Showers 10 to 15 mph NE 33%
Tuesday Night 47°F Mostly Cloudy 5 to 15 mph NE 8%
Wednesday 66°F Partly Sunny 5 to 10 mph NNE 5%
Wednesday Night 48°F Partly Cloudy 0 to 10 mph NNE 3%
Thursday 69°F Partly Sunny 5 to 10 mph NNE 4%
Thursday Night 50°F Partly Cloudy 0 to 5 mph NE 4%
Friday 71°F Mostly Sunny 0 to 10 mph NNE 5%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Hillcrest, IL

Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
168 days
Hardiness zone
5b

Explore more for Hillcrest, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Rochelle, Il (2.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.