Millersburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millersburg, a city in Iowa County, Iowa.
Today
52°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 9am. Mostly cloudy, with a high near 52. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast for Millersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph W | 18% |
| Tonight | 43°F | Cloudy | 10 to 15 mph W | 11% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph NW | 67% |
| Thursday Night | 39°F | Mostly Cloudy | 5 to 10 mph N | 12% |
| Friday | 50°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 mph W | 2% |
| Sunday Night | 35°F | Clear | 5 mph SW | 0% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Millersburg (41.573, -92.159). Updated through the day.
Growing snapshot for Millersburg
Last spring frost
Apr 28
First fall frost
Oct 9
Growing season
164 days
Hardiness zone
5b
More local growing data for Millersburg: nearby ZIP 52308 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Amana
Conroy
East Amana
High Amana
Homestead
Ladora
Marengo
Middle Amana
North English
Parnell
South Amana
Victor
West Amana
Williamsburg
Climate data from the nearest NOAA station, Williamsburg 1E, Ia (10.5 mi from Millersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.