Unionville, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Unionville, a city in Appanoose County, Iowa.
Tonight
71°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 2am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South southeast wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Unionville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 8 mph SSE | 26% |
| Saturday | 86°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 28% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph NNW | 73% |
| Sunday | 73°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 69% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 10 mph NE | 68% |
| Monday | 63°F | Rain Showers Likely | 10 mph NE | 66% |
| Monday Night | 54°F | Rain Showers Likely | 9 mph NE | 56% |
| Tuesday | 61°F | Slight Chance Rain Showers | 8 mph NE | 24% |
| Tuesday Night | 49°F | Mostly Cloudy | 2 to 6 mph NE | 5% |
| Wednesday | 65°F | Mostly Sunny | 3 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 2 mph ENE | 3% |
| Thursday | 67°F | Partly Sunny | 2 mph ENE | 9% |
| Thursday Night | 56°F | Mostly Cloudy | 1 mph E | 10% |
| Friday | 69°F | Slight Chance Rain Showers | 3 mph E | 15% |
Forecast source: National Weather Service (api.weather.gov) for Unionville (40.818, -92.696). Updated through the day.
Growing snapshot for Unionville
Last spring frost
Apr 18
First fall frost
Oct 23
Growing season
187 days
Hardiness zone
5b
More local growing data for Unionville: nearby ZIP 52594 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rathbun Dam, Ia (12.6 mi from Unionville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.