South Lyon, MI Weather & Growing Conditions
Today
66°F
Light Rain
Rain. Cloudy, with a high near 66. South wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Light Rain | 15 to 18 mph S | 92% |
| Tonight | 49°F | Light Rain then Mostly Cloudy | 10 to 15 mph SSW | 78% |
| Thursday | 58°F | Mostly Cloudy | 12 to 17 mph SW | 9% |
| Thursday Night | 41°F | Chance Light Rain | 3 to 9 mph W | 51% |
| Friday | 51°F | Light Rain Likely | 5 to 10 mph NW | 59% |
| Friday Night | 33°F | Light Rain Likely | 10 mph NNW | 59% |
| Saturday | 49°F | Partly Sunny | 9 to 14 mph NW | 10% |
| Saturday Night | 30°F | Partly Cloudy | 7 mph WNW | 3% |
| Sunday | 55°F | Mostly Sunny | 7 to 14 mph W | 5% |
| Sunday Night | 31°F | Partly Cloudy | 7 to 12 mph W | 5% |
| Monday | 57°F | Mostly Sunny | 7 to 12 mph W | 2% |
| Monday Night | 36°F | Partly Cloudy | 10 mph WSW | 2% |
| Tuesday | 60°F | Mostly Sunny then Slight Chance Light Rain | 9 to 13 mph W | 15% |
| Tuesday Night | 33°F | Slight Chance Light Rain | 3 to 9 mph NW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Lyon, MI
Last spring frost
May 5
First fall frost
Oct 13
Growing season
160 days
Hardiness zone
6a
Explore more for South Lyon, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Whitmore Lake 1Nw, Mi (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.