Flat Rock, MI Weather & Growing Conditions
Tonight
56°F
Mostly Cloudy then Chance Light Rain
A chance of rain after 1am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. Northeast wind 6 to 9 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 | 56°F | Mostly Cloudy then Chance Light Rain | 6 to 9 mph NE | 25% |
| Saturday | 69°F | Rain Showers | 6 to 9 mph E | 86% |
| Saturday Night | 58°F | Showers And Thunderstorms | 5 to 9 mph E | 89% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 7 to 14 mph N | 64% |
| Sunday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 14 mph NE | 49% |
| Monday | 64°F | Slight Chance Rain Showers | 13 to 16 mph NE | 20% |
| Monday Night | 50°F | Mostly Cloudy | 16 mph NE | 14% |
| Tuesday | 63°F | Slight Chance Rain Showers | 18 mph NE | 20% |
| Tuesday Night | 52°F | Chance Rain Showers | 14 to 17 mph NE | 50% |
| Wednesday | 63°F | Chance Rain Showers | 16 mph ENE | 53% |
| Wednesday Night | 52°F | Chance Rain Showers | 8 to 13 mph NE | 53% |
| Thursday | 66°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NE | 15% |
| Thursday Night | 52°F | Mostly Cloudy | 6 to 9 mph NNE | 9% |
| Friday | 68°F | Partly Sunny | 9 mph NNE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Flat Rock, MI
Last spring frost
Apr 27
First fall frost
Oct 20
Growing season
176 days
Hardiness zone
6b
Explore more for Flat Rock, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Carleton 2W, Mi (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.