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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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Creve Coeur
Deer Creek
Delavan
East Peoria
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Heritage Lake
Hopedale
Manito
Marquette Heights
Minier
Morton
North Pekin
Pekin
South Pekin
Tremont
Washington
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.