Macomb, IL Weather & Growing Conditions
Tonight
69°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Partly cloudy. Low around 69, with temperatures rising to around 71 overnight. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 18% |
| Saturday | 88°F | Slight Chance Rain Showers then Partly Sunny | 5 mph S | 15% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 61% |
| Sunday | 77°F | Rain Showers Likely | 0 to 10 mph N | 64% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 66% |
| Monday | 65°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Monday Night | 54°F | Chance Rain Showers | 5 to 15 mph NE | 50% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 33% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 54°F | Partly Cloudy | 0 mph | 4% |
| Friday | 71°F | Mostly Sunny | 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.