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Mackinaw, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mackinaw, a village in Tazewell County, Illinois.

Overnight
69°F
Mostly Cloudy
Mostly cloudy, with a low around 69. South southeast wind around 8 mph, with gusts as high as 16 mph.

7-day forecast for Mackinaw

WhenTempForecastWindPrecip
Overnight 69°F Mostly Cloudy 8 mph SSE 8%
Saturday 86°F Chance Showers And Thunderstorms 8 mph SE 33%
Saturday Night 68°F Chance Showers And Thunderstorms 2 to 6 mph SW 52%
Sunday 76°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 3 to 14 mph N 70%
Sunday Night 58°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 15 mph NE 62%
Monday 66°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 14 mph NE 22%
Tuesday Night 51°F Partly Cloudy 7 to 14 mph NNE 14%
Wednesday 68°F Mostly Sunny 12 mph NNE 4%
Wednesday Night 53°F Partly Cloudy 5 to 9 mph NNE 1%
Thursday 70°F Mostly Sunny 5 to 8 mph NNE 2%
Thursday Night 54°F Partly Cloudy 3 to 7 mph NE 2%
Friday 73°F Mostly Sunny 5 to 8 mph NE 3%

Forecast source: National Weather Service (api.weather.gov) for Mackinaw (40.534, -89.355). Updated through the day.

Growing snapshot for Mackinaw

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

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

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