Macomb, IL Weather & Growing Conditions
Today
87°F
Mostly Cloudy
Mostly cloudy, with a high near 87. South wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Cloudy | 5 to 10 mph S | 5% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 5 mph SW | 64% |
| Sunday | 75°F | Showers And Thunderstorms | 0 to 10 mph N | 80% |
| Sunday Night | 59°F | Showers And Thunderstorms | 10 to 15 mph NE | 77% |
| Monday | 64°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 71% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 47% |
| Tuesday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 22% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
| Thursday Night | 54°F | Partly Cloudy | 0 mph | 4% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Macomb, IL
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
185 days
Hardiness zone
6a
Explore more for Macomb, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Prairie City 2S, Il (13.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.