Flat Rock, MI Weather & Growing Conditions
Overnight
60°F
Mostly Cloudy
Mostly cloudy. Low around 60, with temperatures rising to around 62 overnight. South southeast wind around 10 mph, with gusts as high as 22 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Mostly Cloudy | 10 mph SSE | 11% |
| Wednesday | 66°F | Light Rain | 12 to 17 mph S | 100% |
| Wednesday Night | 50°F | Light Rain Likely then Mostly Cloudy | 9 to 15 mph SSW | 60% |
| Thursday | 60°F | Mostly Cloudy | 10 to 16 mph SW | 7% |
| Thursday Night | 43°F | Chance Light Rain | 5 to 9 mph W | 36% |
| Friday | 54°F | Chance Light Rain | 5 to 9 mph NW | 49% |
| Friday Night | 36°F | Chance Light Rain | 9 mph NW | 43% |
| Saturday | 52°F | Slight Chance Light Rain then Partly Sunny | 12 mph NW | 18% |
| Saturday Night | 32°F | Partly Cloudy | 7 mph WNW | 4% |
| Sunday | 56°F | Mostly Sunny | 6 to 13 mph W | 4% |
| Sunday Night | 33°F | Partly Cloudy | 6 to 10 mph W | 4% |
| Monday | 58°F | Sunny | 6 to 10 mph WSW | 3% |
| Monday Night | 37°F | Partly Cloudy | 9 mph SW | 1% |
| Tuesday | 61°F | Mostly Sunny then Slight Chance Light Rain | 8 to 12 mph W | 15% |
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 Nov 4, 2026.