Grass Lake, MI Weather & Growing Conditions
This Afternoon
85°F
Sunny
Sunny, with a high near 85. South southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 6 mph SSW | 0% |
| Tonight | 58°F | Mostly Clear | 2 to 6 mph S | 0% |
| Wednesday | 86°F | Sunny | 1 to 6 mph SW | 6% |
| Wednesday Night | 63°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph WSW | 67% |
| Thursday | 82°F | Showers And Thunderstorms | 2 to 6 mph WSW | 78% |
| Thursday Night | 61°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph WSW | 78% |
| Friday | 84°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 to 5 mph SW | 36% |
| Friday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 36% |
| Saturday | 86°F | Mostly Sunny | 2 to 8 mph WSW | 10% |
| Saturday Night | 64°F | Mostly Clear then Chance Rain Showers | 3 to 7 mph SW | 26% |
| Sunday | 88°F | Chance Rain Showers | 3 to 13 mph SW | 26% |
| Sunday Night | 66°F | Chance Rain Showers | 7 to 13 mph WSW | 42% |
| Monday | 86°F | Chance Rain Showers | 6 to 9 mph WSW | 42% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 8 mph WSW | 51% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grass Lake, MI
Last spring frost
Apr 30
First fall frost
Oct 12
Growing season
163 days
Hardiness zone
6a
Explore more for Grass Lake, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Chelsea, Mi (9.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.