Bay City, MI Weather & Growing Conditions
Today
65°F
Chance Rain Showers
A chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Cloudy. High near 65, with temperatures falling to around 63 in the afternoon. East southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Chance Rain Showers | 8 mph ESE | 52% |
| Tonight | 56°F | Rain Showers | 8 mph E | 75% |
| Sunday | 69°F | Chance Rain Showers | 8 to 16 mph NE | 51% |
| Sunday Night | 50°F | Partly Cloudy | 12 to 16 mph NE | 0% |
| Monday | 61°F | Mostly Cloudy | 13 to 18 mph NE | 1% |
| Monday Night | 46°F | Mostly Cloudy | 10 to 18 mph NE | 1% |
| Tuesday | 62°F | Mostly Sunny | 10 to 18 mph ENE | 2% |
| Tuesday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 13 to 18 mph ENE | 26% |
| Wednesday | 63°F | Chance Rain Showers | 16 mph ENE | 38% |
| Wednesday Night | 47°F | Chance Rain Showers | 6 to 15 mph ENE | 36% |
| Thursday | 66°F | Partly Sunny | 7 to 13 mph NE | 14% |
| Thursday Night | 48°F | Mostly Cloudy | 5 to 12 mph NE | 9% |
| Friday | 69°F | Mostly Sunny | 5 to 13 mph NE | 5% |
| Friday Night | 47°F | Partly Cloudy | 5 to 12 mph NE | 4% |
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 Sep 19, 2026.