Millersburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millersburg, a city in Iowa County, Iowa.
This Afternoon
79°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Millersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Chance Showers And Thunderstorms | 5 mph SW | 34% |
| Tonight | 62°F | Showers And Thunderstorms Likely | 5 to 10 mph NW | 83% |
| Sunday | 66°F | Rain Showers Likely | 10 to 15 mph NE | 55% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 56% |
| Monday | 60°F | Rain Showers | 15 mph NE | 77% |
| Monday Night | 51°F | Rain Showers Likely | 10 mph NE | 64% |
| Tuesday | 59°F | Slight Chance Rain Showers | 10 mph NE | 24% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 63°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 65°F | Partly Sunny | 0 to 5 mph E | 13% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 0 to 5 mph E | 20% |
| Friday | 68°F | Slight Chance Rain Showers | 0 to 5 mph E | 20% |
| Friday Night | 56°F | Mostly Cloudy | 0 to 5 mph E | 11% |
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 Sep 20, 2026.