Bay City, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bay City, a city in Bay County, Michigan.
Today
87°F
Sunny
Sunny, with a high near 87. Southwest wind 6 to 10 mph.
7-day forecast for Bay City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 6 to 10 mph SW | 0% |
| Tonight | 62°F | Mostly Clear | 5 to 9 mph SSW | 0% |
| Wednesday | 84°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 37% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 8 mph WNW | 82% |
| Thursday | 79°F | Rain Showers | 3 to 7 mph N | 82% |
| Thursday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph ESE | 31% |
| Friday | 84°F | Mostly Sunny | 2 to 6 mph SSW | 9% |
| Friday Night | 62°F | Mostly Clear | 5 mph SSW | 9% |
| Saturday | 87°F | Sunny | 5 to 13 mph SW | 6% |
| Saturday Night | 65°F | Chance Rain Showers | 6 to 12 mph SW | 32% |
| Sunday | 88°F | Chance Rain Showers | 6 to 17 mph SW | 32% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 7 to 15 mph WSW | 52% |
| Monday | 85°F | Chance Rain Showers | 10 mph WSW | 52% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 49% |
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 Aug 4, 2026.