Harman US

Heritage Lake, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Heritage Lake, a community in Tazewell County, Illinois.

Today
86°F
Mostly Cloudy
Mostly cloudy, with a high near 86. Southeast wind around 8 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Heritage Lake

WhenTempForecastWindPrecip
Today 86°F Mostly Cloudy 8 mph SE 9%
Tonight 68°F Chance Showers And Thunderstorms 6 mph SSW 52%
Sunday 75°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 3 to 14 mph NNW 70%
Sunday Night 58°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 16 mph NE 62%
Monday 65°F Showers And Thunderstorms Likely 16 mph ENE 64%
Monday Night 53°F Chance Rain Showers 12 to 16 mph NE 47%
Tuesday 64°F Slight Chance Rain Showers 15 mph NE 22%
Tuesday Night 51°F Slight Chance Rain Showers then Partly Cloudy 8 to 14 mph NNE 15%
Wednesday 67°F Mostly Sunny 12 mph NNE 4%
Wednesday Night 53°F Partly Cloudy 5 to 10 mph NNE 1%
Thursday 69°F Mostly Sunny 8 mph NNE 2%
Thursday Night 54°F Partly Cloudy 3 to 7 mph NE 2%
Friday 72°F Mostly Sunny 5 to 8 mph NE 3%
Friday Night 53°F Partly Cloudy 7 mph NE 3%

Forecast source: National Weather Service (api.weather.gov) for Heritage Lake (40.547, -89.330). Updated through the day.

Growing snapshot for Heritage Lake

Last spring frost
Apr 21
First fall frost
Oct 17
Growing season
178 days
Hardiness zone
6a

More local growing data for Heritage Lake: nearby ZIP 61755 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

All Illinois locations ›

Climate data from the nearest NOAA station, Congerville 2Nw, Il (8.4 mi from Heritage Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.