Flat Rock, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flat Rock, a city in Wayne County, Michigan.
Overnight
57°F
Chance Light Rain
A chance of rain after 1am. Mostly cloudy, with a low around 57. Northeast wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Flat Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Chance Light Rain | 8 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 | 65°F | Slight Chance Rain Showers | 13 to 16 mph NE | 20% |
| Monday Night | 51°F | Mostly Cloudy | 16 mph NE | 14% |
| Tuesday | 63°F | Slight Chance Rain Showers | 17 mph NE | 21% |
| Tuesday Night | 53°F | Chance Rain Showers | 16 mph NE | 50% |
| Wednesday | 64°F | Chance Rain Showers | 16 mph ENE | 53% |
| Wednesday Night | 53°F | Chance Rain Showers | 8 to 13 mph NE | 53% |
| Thursday | 66°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph NE | 15% |
| Thursday Night | 53°F | Mostly Cloudy | 6 to 9 mph NNE | 9% |
| Friday | 68°F | Partly Sunny | 7 to 10 mph NNE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Flat Rock (42.098, -83.270). Updated through the day.
Growing snapshot for Flat Rock
Last spring frost
Apr 27
First fall frost
Oct 20
Growing season
176 days
Hardiness zone
6b
More local growing data for Flat Rock: nearby ZIP 48134 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Allen Park
Belleville
Dearborn
Dearborn Heights
Detroit
Ecorse
Garden City
Gibraltar
Grosse Pointe
Grosse Pointe Farms
Grosse Pointe Park
Grosse Pointe Woods
Hamtramck
Harper Woods
Highland Park
Inkster
Lincoln Park
Livonia
Melvindale
Plymouth
River Rouge
Riverview
Rockwood
Romulus
Southgate
Taylor
Trenton
Wayne
Westland
Woodhaven
Climate data from the nearest NOAA station, Carleton 2W, Mi (7.8 mi from Flat Rock). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.