Unionville, MI Weather & Growing Conditions
Tonight
47°F
Chance Light Rain
A chance of rain after 8pm. Mostly cloudy. Low around 47, with temperatures rising to around 50 overnight. East northeast wind 3 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Chance Light Rain | 3 to 9 mph ENE | 31% |
| Saturday | 67°F | Rain Showers Likely | 3 to 9 mph ESE | 57% |
| Saturday Night | 51°F | Rain Showers Likely | 5 to 9 mph E | 63% |
| Sunday | 67°F | Chance Rain Showers then Mostly Cloudy | 7 to 17 mph NE | 38% |
| Sunday Night | 47°F | Mostly Cloudy | 10 to 16 mph NE | 2% |
| Monday | 63°F | Mostly Cloudy | 13 to 18 mph NE | 1% |
| Monday Night | 45°F | Mostly Cloudy | 9 to 18 mph NE | 4% |
| Tuesday | 63°F | Partly Sunny | 12 to 18 mph ENE | 7% |
| Tuesday Night | 46°F | Mostly Cloudy then Chance Rain Showers | 10 to 17 mph ENE | 33% |
| Wednesday | 64°F | Chance Rain Showers | 12 to 15 mph ENE | 41% |
| Wednesday Night | 47°F | Chance Rain Showers | 5 to 13 mph ENE | 34% |
| Thursday | 67°F | Partly Sunny | 6 to 12 mph NE | 14% |
| Thursday Night | 47°F | Mostly Cloudy | 3 to 10 mph NE | 12% |
| Friday | 69°F | Mostly Sunny | 3 to 10 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Unionville, MI
Last spring frost
May 7
First fall frost
Oct 9
Growing season
154 days
Hardiness zone
6a
Explore more for Unionville, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Caro Wwtp, Mi (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.