Bay City, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bay City, a city in Bay County, Michigan.
This Afternoon
76°F
Mostly Sunny
Mostly sunny. High near 76, with temperatures falling to around 74 in the afternoon. South southwest wind around 15 mph, with gusts as high as 26 mph.
7-day forecast for Bay City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 15 mph SSW | 2% |
| Tonight | 60°F | Mostly Cloudy | 9 to 13 mph S | 3% |
| Wednesday | 71°F | Light Rain | 10 to 17 mph S | 88% |
| Wednesday Night | 50°F | Light Rain Likely then Mostly Cloudy | 8 to 14 mph SSW | 64% |
| Thursday | 59°F | Mostly Cloudy then Chance Light Rain | 12 to 16 mph SW | 42% |
| Thursday Night | 43°F | Light Rain Likely | 3 to 9 mph W | 59% |
| Friday | 52°F | Light Rain Likely | 6 to 14 mph NNW | 59% |
| Friday Night | 36°F | Chance Light Rain | 8 to 14 mph NNW | 46% |
| Saturday | 52°F | Slight Chance Light Rain then Partly Sunny | 7 to 10 mph NW | 22% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph WSW | 4% |
| Sunday | 56°F | Mostly Sunny then Slight Chance Light Rain | 5 to 13 mph WSW | 17% |
| Sunday Night | 33°F | Slight Chance Light Rain then Partly Cloudy | 6 to 10 mph WNW | 17% |
| Monday | 57°F | Mostly Sunny | 6 to 14 mph W | 10% |
| Monday Night | 38°F | Partly Cloudy | 8 to 12 mph WSW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Bay City (43.590, -83.888). Updated through the day.
Growing snapshot for Bay City
Last spring frost
Apr 27
First fall frost
Oct 20
Growing season
173 days
Hardiness zone
6a
More local growing data for Bay City: nearby ZIP 48708 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Essexville, Mi (4.1 mi from Bay City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.