Millersburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millersburg, a city in Iowa County, Iowa.
Today
84°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 84. West wind 5 to 10 mph. Chance of precipitation is 40%.
7-day forecast for Millersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 38% |
| Tonight | 63°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 87% |
| Wednesday | 76°F | Showers And Thunderstorms | 5 mph NE | 78% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 5 mph NE | 47% |
| Thursday | 81°F | Slight Chance Rain Showers then Mostly Sunny | 5 mph NE | 20% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph E | 2% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Mostly Clear | 5 mph S | 14% |
| Saturday | 88°F | Sunny | 5 to 10 mph S | 11% |
| Saturday Night | 70°F | Mostly Clear | 10 mph S | 13% |
| Sunday | 89°F | Mostly Sunny | 10 mph S | 13% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 10 mph S | 34% |
| Monday | 89°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 34% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 31% |
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 Aug 4, 2026.