Millersburg, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Millersburg, a community in Mercer County, Illinois.

Tonight

51°F

Showers And Thunderstorms Likely

Showers and thunderstorms likely before 4am. Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

7-day forecast for Millersburg

When	Temp	Forecast	Wind	Precip
Tonight	51°F	Showers And Thunderstorms Likely	10 to 15 mph S	68%
Wednesday	55°F	Slight Chance Rain Showers	15 mph SW	23%
Wednesday Night	45°F	Mostly Cloudy	10 to 15 mph SW	14%
Thursday	55°F	Chance Rain Showers	10 to 15 mph W	32%
Thursday Night	42°F	Chance Rain Showers then Mostly Cloudy	5 to 10 mph NW	30%
Friday	52°F	Partly Sunny	5 to 10 mph N	10%
Friday Night	34°F	Partly Cloudy	0 to 5 mph N	1%
Saturday	53°F	Mostly Sunny	0 to 5 mph W	2%
Saturday Night	35°F	Mostly Clear	0 to 5 mph W	3%
Sunday	59°F	Sunny	5 to 10 mph W	10%
Sunday Night	36°F	Mostly Clear	0 to 5 mph W	2%
Monday	63°F	Sunny	5 to 10 mph SW	0%
Monday Night	40°F	Mostly Clear	5 mph W	0%
Tuesday	64°F	Sunny	5 mph NW	0%

Forecast source: National Weather Service (api.weather.gov) for Millersburg (41.240, -90.819). Updated through the day.

Growing snapshot for Millersburg

Last spring frost

Apr 22

First fall frost

Oct 19

Growing season

181 days

Hardiness zone

More local growing data for Millersburg: nearby ZIP 61260 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Aledo Alexis Cable Eliza Hamlet Joy Keithsburg Matherville New Boston North Henderson Preemption Reynolds Seaton Sherrard Viola Windsor

All Illinois locations ›

Climate data from the nearest NOAA station, Aledo, Il (7.9 mi from Millersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.