Union City, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a village in Branch County, Michigan.
Tonight
55°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 2am. Mostly cloudy, with a low around 55. East wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy then Chance Rain Showers | 5 mph E | 38% |
| Saturday | 70°F | Showers And Thunderstorms | 5 to 10 mph SE | 90% |
| Saturday Night | 59°F | Showers And Thunderstorms | 5 mph SE | 87% |
| Sunday | 68°F | Showers And Thunderstorms | 5 to 10 mph NE | 80% |
| Sunday Night | 50°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 47% |
| Monday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Monday Night | 46°F | Mostly Cloudy | 10 to 15 mph NE | 13% |
| Tuesday | 63°F | Partly Sunny then Chance Rain Showers | 10 to 15 mph NE | 27% |
| Tuesday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Wednesday | 63°F | Slight Chance Rain Showers | 10 mph NE | 23% |
| Wednesday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 16% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 7% |
| Thursday Night | 49°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Friday | 69°F | Mostly Sunny | 5 to 10 mph N | 7% |
Forecast source: National Weather Service (api.weather.gov) for Union City (42.067, -85.143). Updated through the day.
Growing snapshot for Union City
Last spring frost
May 2
First fall frost
Oct 13
Growing season
163 days
Hardiness zone
6a
More local growing data for Union City: nearby ZIP 49094 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Coldwater St School, Mi (8.7 mi from Union City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.