Millersburg, IL Weather & Growing Conditions

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

This Afternoon

77°F

Mostly Sunny

Mostly sunny, with a high near 77. Southeast wind around 10 mph.

7-day forecast for Millersburg

When	Temp	Forecast	Wind	Precip
This Afternoon	77°F	Mostly Sunny	10 mph SE	6%
Tonight	69°F	Mostly Cloudy then Chance Showers And Thunderstorms	5 to 10 mph SE	48%
Saturday	84°F	Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	5 to 10 mph S	55%
Saturday Night	66°F	Chance Showers And Thunderstorms then Showers And Thunderstorms	5 mph N	79%
Sunday	73°F	Showers And Thunderstorms Likely	5 to 15 mph NE	77%
Sunday Night	58°F	Showers And Thunderstorms Likely	15 mph NE	70%
Monday	65°F	Rain Showers Likely	15 mph NE	61%
Monday Night	54°F	Rain Showers Likely	10 to 15 mph NE	56%
Tuesday	63°F	Chance Rain Showers	10 to 15 mph NE	39%
Tuesday Night	50°F	Partly Cloudy	5 to 10 mph NE	6%
Wednesday	67°F	Mostly Sunny	5 to 10 mph NE	1%
Wednesday Night	53°F	Partly Cloudy	0 to 5 mph NE	2%
Thursday	70°F	Mostly Sunny	5 mph NE	5%
Thursday Night	55°F	Partly Cloudy	0 to 5 mph NE	6%

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 Sep 18, 2026.