Grass Lake, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grass Lake, a village in Jackson County, Michigan.
Today
85°F
Sunny
Sunny, with a high near 85. South southwest wind 2 to 6 mph.
7-day forecast for Grass Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 to 6 mph SSW | 0% |
| Tonight | 57°F | Mostly Clear | 1 to 5 mph S | 0% |
| Wednesday | 86°F | Sunny | 1 to 7 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 | 0 to 5 mph SW | 37% |
| Friday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 37% |
| Saturday | 86°F | Mostly Sunny | 2 to 9 mph WSW | 10% |
| Saturday Night | 64°F | Mostly Clear then Chance Rain Showers | 3 to 8 mph SW | 26% |
| Sunday | 88°F | Chance Rain Showers | 3 to 13 mph SW | 26% |
| Sunday Night | 65°F | Chance Rain Showers | 7 to 13 mph WSW | 42% |
| Monday | 87°F | Chance Rain Showers | 9 mph WSW | 42% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 9 mph WSW | 51% |
Forecast source: National Weather Service (api.weather.gov) for Grass Lake (42.251, -84.206). Updated through the day.
Growing snapshot for Grass Lake
Last spring frost
Apr 30
First fall frost
Oct 12
Growing season
163 days
Hardiness zone
6a
More local growing data for Grass Lake: nearby ZIP 49240 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Brooklyn
Cement City
Concord
Hanover
Jackson
Michigan Center
Napoleon
Parma
Spring Arbor
Springport
Vandercook Lake
Vineyard Lake
Climate data from the nearest NOAA station, Chelsea, Mi (9.3 mi from Grass Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.