Macomb, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Macomb, a city in Mcdonough County, Illinois.
Overnight
61°F
Mostly Clear
Mostly clear. Low around 61, with temperatures rising to around 63 overnight. Southeast wind around 5 mph.
7-day forecast for Macomb
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph SE | 0% |
| Tuesday | 89°F | Sunny | 5 mph S | 1% |
| Tuesday Night | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 16% |
| Wednesday | 83°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 55% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph N | 88% |
| Thursday | 80°F | Showers And Thunderstorms | 0 mph | 79% |
| Thursday Night | 63°F | Partly Cloudy | 0 mph | 14% |
| Friday | 83°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 21% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Sunny | 0 to 5 mph S | 17% |
| Saturday Night | 70°F | Mostly Clear | 0 to 5 mph S | 8% |
| Sunday | 88°F | Sunny | 5 to 10 mph SW | 7% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 16% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 16% |
Forecast source: National Weather Service (api.weather.gov) for Macomb (40.470, -90.683). Updated through the day.
Growing snapshot for Macomb
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
185 days
Hardiness zone
6a
More local growing data for Macomb: nearby ZIP 61455 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adair
Bardolph
Blandinsville
Bushnell
Colchester
Georgetown
Good Hope
Industry
Prairie City
Sciota
Tennessee
Climate data from the nearest NOAA station, Prairie City 2S, Il (13.9 mi from Macomb). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.