Macon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Macon, a city in Macon County, Illinois.
This Afternoon
88°F
Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 88. East northeast wind around 9 mph. Chance of precipitation is 20%.
7-day forecast for Macon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 88°F | Slight Chance Showers And Thunderstorms | 9 mph ENE | 19% |
| Tonight | 71°F | Partly Cloudy | 9 mph ESE | 7% |
| Saturday | 92°F | Slight Chance Showers And Thunderstorms | 9 mph SSW | 21% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Rain Showers | 8 mph S | 21% |
| Sunday | 86°F | Chance Rain Showers | 3 to 10 mph NW | 40% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 13 mph NE | 67% |
| Monday | 72°F | Showers And Thunderstorms Likely | 14 mph NE | 67% |
| Monday Night | 55°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Tuesday | 69°F | Chance Rain Showers | 15 mph NE | 34% |
| Tuesday Night | 52°F | Mostly Cloudy | 7 to 13 mph NNE | 7% |
| Wednesday | 71°F | Partly Sunny | 8 to 12 mph NNE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 5 to 9 mph NNE | 2% |
| Thursday | 72°F | Mostly Sunny | 5 to 9 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 3 to 8 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Macon (39.709, -88.997). Updated through the day.
Growing snapshot for Macon
Last spring frost
Apr 14
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6a
More local growing data for Macon: nearby ZIP 62544 weather · frost dates · planting calendar · Illinois frost dates
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Harristown
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Niantic
Oreana
Warrensburg
Climate data from the nearest NOAA station, Decatur Wtp, Il (8.4 mi from Macon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.