Mackinaw, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mackinaw, a village in Tazewell County, Illinois.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South southwest wind around 7 mph.
7-day forecast for Mackinaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 7 mph SSW | 0% |
| Tonight | 67°F | Partly Cloudy | 6 mph SSE | 7% |
| Wednesday | 85°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 7 mph SSW | 31% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 6 mph SSE | 90% |
| Thursday | 81°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph SSW | 78% |
| Thursday Night | 64°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SSE | 16% |
| Friday | 84°F | Mostly Sunny | 3 mph S | 10% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 2 mph S | 22% |
| Saturday | 86°F | Mostly Sunny | 6 mph SSW | 11% |
| Saturday Night | 70°F | Mostly Clear | 7 mph S | 11% |
| Sunday | 88°F | Sunny | 7 to 12 mph SSW | 8% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 7 to 10 mph SSW | 16% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 7 to 10 mph SSW | 16% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 9 mph SW | 28% |
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
Armington
Creve Coeur
Deer Creek
Delavan
East Peoria
Green Valley
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 Aug 4, 2026.