Bay City, MI Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. Southwest wind 6 to 12 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 6 to 12 mph SW | 0% |
| Tonight | 61°F | Mostly Clear | 6 to 10 mph SW | 0% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 6 to 12 mph SW | 44% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 3 to 9 mph W | 83% |
| Thursday | 79°F | Rain Showers | 7 mph N | 83% |
| Thursday Night | 59°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph ESE | 32% |
| Friday | 83°F | Mostly Sunny | 2 to 6 mph SSW | 9% |
| Friday Night | 61°F | Mostly Clear | 5 mph SSW | 9% |
| Saturday | 86°F | Sunny | 5 to 15 mph WSW | 5% |
| Saturday Night | 64°F | Mostly Clear then Chance Rain Showers | 6 to 13 mph SW | 32% |
| Sunday | 86°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 18 mph SW | 32% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 7 to 16 mph W | 52% |
| Monday | 84°F | Chance Rain Showers | 10 mph WSW | 52% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 6 to 9 mph W | 48% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Bay City, MI
Last spring frost
Apr 26
First fall frost
Oct 17
Growing season
172 days
Hardiness zone
6a
Explore more for Bay City, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Saginaw Mbs Intl Ap, Mi (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.