Mackinaw, IL Weather & Growing Conditions

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

Overnight

56°F

Chance Light Rain

A chance of rain. Mostly cloudy, with a low around 56. South southwest wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Mackinaw

When	Temp	Forecast	Wind	Precip
Overnight	56°F	Chance Light Rain	13 mph SSW	25%
Wednesday	59°F	Patchy Drizzle	15 mph SW	11%
Wednesday Night	46°F	Patchy Drizzle then Mostly Cloudy	13 mph SW	10%
Thursday	58°F	Mostly Cloudy then Slight Chance Light Rain	10 to 15 mph WSW	19%
Thursday Night	42°F	Chance Light Rain	6 to 9 mph NW	32%
Friday	52°F	Partly Sunny	8 to 12 mph N	7%
Friday Night	32°F	Partly Cloudy	1 to 7 mph NNW	0%
Saturday	53°F	Sunny	1 to 6 mph NW	0%
Saturday Night	32°F	Mostly Clear	3 mph WNW	2%
Sunday	58°F	Sunny	2 to 8 mph W	1%
Sunday Night	34°F	Clear	1 to 5 mph WSW	0%
Monday	64°F	Sunny	1 to 8 mph SW	0%
Monday Night	39°F	Mostly Clear	2 to 6 mph WSW	0%
Tuesday	66°F	Sunny	2 to 6 mph WNW	1%

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

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

Nearby towns & communities

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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 Nov 4, 2026.