South Lyon, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Lyon, a city in Oakland County, Michigan.
This Afternoon
72°F
Mostly Cloudy
Mostly cloudy. High near 72, with temperatures falling to around 70 in the afternoon. Northeast wind around 8 mph.
7-day forecast for South Lyon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Cloudy | 8 mph NE | 0% |
| Tonight | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph ENE | 19% |
| Saturday | 66°F | Rain Showers | 6 to 9 mph ESE | 88% |
| Saturday Night | 56°F | Showers And Thunderstorms | 6 to 9 mph E | 78% |
| Sunday | 66°F | Rain Showers Likely | 7 to 13 mph NNE | 62% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 13 mph NE | 44% |
| Monday | 62°F | Slight Chance Rain Showers | 12 to 15 mph NE | 16% |
| Monday Night | 48°F | Mostly Cloudy | 15 mph NE | 10% |
| Tuesday | 61°F | Mostly Cloudy then Slight Chance Rain Showers | 16 mph NE | 15% |
| Tuesday Night | 50°F | Chance Rain Showers | 14 mph NE | 47% |
| Wednesday | 61°F | Chance Rain Showers | 15 mph ENE | 47% |
| Wednesday Night | 50°F | Chance Rain Showers | 8 to 12 mph NE | 45% |
| Thursday | 64°F | Partly Sunny | 10 mph NNE | 12% |
| Thursday Night | 50°F | Mostly Cloudy | 5 to 8 mph NNE | 12% |
Forecast source: National Weather Service (api.weather.gov) for South Lyon (42.461, -83.653). Updated through the day.
Growing snapshot for South Lyon
Last spring frost
May 5
First fall frost
Oct 13
Growing season
160 days
Hardiness zone
6a
More local growing data for South Lyon: nearby ZIP 48178 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Auburn Hills
Berkley
Beverly Hills
Bingham Farms
Birmingham
Bloomfield Hills
Clawson
Farmington
Farmington Hills
Ferndale
Franklin
Hazel Park
Holly
Huntington Woods
Keego Harbor
Lake Angelus
Lake Orion
Lathrup Village
Leonard
Madison Heights
Milford
Northville
Novi
Oak Park
Orchard Lake Village
Ortonville
Oxford
Pleasant Ridge
Pontiac
Rochester
Climate data from the nearest NOAA station, Whitmore Lake 1Nw, Mi (6.5 mi from South Lyon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.