Macomb, IL Weather & Growing Conditions
This Afternoon
69°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 67 in the afternoon. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 15 to 20 mph S | 95% |
| Tonight | 51°F | Showers And Thunderstorms Likely | 10 to 15 mph S | 67% |
| Wednesday | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 15% |
| Wednesday Night | 43°F | Mostly Cloudy | 10 mph SW | 4% |
| Thursday | 56°F | Partly Sunny | 10 to 15 mph W | 13% |
| Thursday Night | 42°F | Mostly Cloudy then Chance Rain Showers | 5 mph NW | 27% |
| Friday | 53°F | Mostly Cloudy | 5 to 10 mph N | 12% |
| Friday Night | 35°F | Mostly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 mph | 1% |
| Saturday Night | 35°F | Mostly Clear | 0 mph | 1% |
| Sunday | 59°F | Sunny | 0 to 10 mph W | 10% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 3% |
| Monday | 64°F | Sunny | 0 to 10 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 0 to 5 mph W | 0% |
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 Nov 3, 2026.