Heritage Lake, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Heritage Lake, a community in Tazewell County, Illinois.
Tonight
68°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 68. South southwest wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Heritage Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 8 mph SSW | 23% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 7 to 14 mph NNE | 39% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 14 mph ENE | 47% |
| Monday | 66°F | Rain Showers Likely | 15 mph ENE | 67% |
| Monday Night | 54°F | Chance Rain Showers | 12 to 15 mph ENE | 53% |
| Tuesday | 64°F | Chance Rain Showers | 14 mph NE | 53% |
| Tuesday Night | 52°F | Mostly Cloudy | 7 to 14 mph NE | 12% |
| Wednesday | 67°F | Partly Sunny | 10 mph NNE | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 3 to 10 mph NNE | 1% |
| Thursday | 70°F | Mostly Sunny | 7 mph NNE | 2% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 2 to 6 mph NE | 15% |
| Friday | 74°F | Partly Sunny | 3 to 7 mph NE | 8% |
| Friday Night | 55°F | Partly Cloudy | 6 mph NE | 8% |
| Saturday | 75°F | Mostly Sunny | 6 mph ENE | 2% |
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
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North Pekin
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Washington
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 20, 2026.