Grass Lake, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grass Lake, a village in Jackson County, Michigan.
Tonight
61°F
Partly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Partly cloudy, with a low around 61. South southeast wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
7-day forecast for Grass Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Partly Cloudy then Slight Chance Rain Showers | 13 mph SSE | 16% |
| Wednesday | 69°F | Rain Showers | 12 to 16 mph S | 87% |
| Wednesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SW | 51% |
| Thursday | 60°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 15 mph SW | 15% |
| Thursday Night | 43°F | Chance Rain Showers | 2 to 8 mph W | 32% |
| Friday | 54°F | Chance Rain Showers | 3 to 8 mph NW | 45% |
| Friday Night | 34°F | Chance Rain Showers | 8 mph NNW | 36% |
| Saturday | 52°F | Partly Sunny | 8 mph NW | 14% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 6% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Rain Showers | 3 to 9 mph W | 17% |
| Sunday Night | 32°F | Slight Chance Rain Showers then Partly Cloudy | 8 mph WNW | 17% |
| Monday | 59°F | Mostly Sunny | 6 to 10 mph W | 12% |
| Monday Night | 36°F | Partly Cloudy | 9 mph WSW | 10% |
| Tuesday | 61°F | Mostly Sunny | 8 to 13 mph W | 3% |
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 Nov 4, 2026.