Brown City, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brown City, a city in Sanilac County, Michigan.
Tonight
50°F
Light Rain Likely
Rain likely. Mostly cloudy. Low around 50, with temperatures rising to around 53 overnight. East northeast wind 2 to 7 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Brown City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Light Rain Likely | 2 to 7 mph ENE | 58% |
| Saturday | 65°F | Rain Showers Likely | 3 to 8 mph ESE | 65% |
| Saturday Night | 53°F | Showers And Thunderstorms Likely | 3 to 7 mph E | 73% |
| Sunday | 65°F | Chance Rain Showers | 5 to 13 mph NNE | 35% |
| Sunday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 12 mph NE | 19% |
| Monday | 62°F | Mostly Cloudy | 8 to 13 mph NE | 3% |
| Monday Night | 46°F | Mostly Cloudy | 7 to 12 mph NE | 5% |
| Tuesday | 61°F | Mostly Cloudy | 9 to 14 mph ENE | 11% |
| Tuesday Night | 48°F | Chance Rain Showers | 8 to 13 mph ENE | 43% |
| Wednesday | 62°F | Chance Rain Showers | 12 mph ENE | 43% |
| Wednesday Night | 48°F | Chance Showers And Thunderstorms | 5 to 9 mph ENE | 42% |
| Thursday | 64°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph NE | 18% |
| Thursday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NNE | 15% |
| Friday | 68°F | Partly Sunny | 3 to 8 mph NNE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Brown City (43.211, -82.988). Updated through the day.
Growing snapshot for Brown City
Last spring frost
May 12
First fall frost
Oct 5
Growing season
147 days
Hardiness zone
6a
More local growing data for Brown City: nearby ZIP 48416 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Applegate
Carsonville
Croswell
Deckerville
Forestville
Lexington
Marlette
Melvin
Minden City
Peck
Port Sanilac
Sandusky
Snover
Ubly
Climate data from the nearest NOAA station, Yale 1 Nnw, Mi (10.5 mi from Brown City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.