South Lyon, MI Weather & Growing Conditions
This Afternoon
66°F
Light Rain
Rain. Cloudy. High near 66, with temperatures falling to around 64 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Light Rain | 15 mph S | 77% |
| Tonight | 49°F | Light Rain Likely then Mostly Cloudy | 10 to 15 mph SSW | 76% |
| Thursday | 58°F | Mostly Cloudy then Slight Chance Light Rain | 12 to 17 mph SW | 8% |
| Thursday Night | 41°F | Light Rain Likely | 12 mph W | 53% |
| Friday | 51°F | Chance Light Rain | 14 mph NW | 63% |
| Friday Night | 33°F | Chance Light Rain | 14 mph NW | 63% |
| Saturday | 49°F | Slight Chance Light Rain then Partly Sunny | 9 to 14 mph NW | 12% |
| Saturday Night | 30°F | Partly Cloudy | 7 mph WNW | 3% |
| Sunday | 55°F | Mostly Sunny | 7 to 15 mph W | 6% |
| Sunday Night | 31°F | Mostly Clear | 7 to 13 mph WNW | 6% |
| Monday | 57°F | Mostly Sunny | 7 to 12 mph W | 2% |
| Monday Night | 36°F | Mostly Clear | 12 mph WSW | 2% |
| Tuesday | 60°F | Mostly Sunny | 12 mph W | 15% |
| Tuesday Night | 33°F | Partly Cloudy | 3 to 8 mph WNW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Lyon, MI
Last spring frost
May 6
First fall frost
Oct 12
Growing season
157 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, Milford Gm Proving Ground, Mi (6.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.