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 between 2pm and 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms. Cloudy, with a high near 65. 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 | 49% |
| Tonight | 56°F | Rain Showers Likely | 8 mph E | 73% |
| Sunday | 69°F | Chance Rain Showers | 8 to 17 mph NE | 49% |
| Sunday Night | 50°F | Partly Cloudy | 12 to 17 mph NE | 0% |
| Monday | 61°F | Mostly Cloudy | 14 to 18 mph NE | 1% |
| Monday Night | 46°F | Mostly Cloudy | 10 to 18 mph ENE | 1% |
| Tuesday | 62°F | Mostly Sunny | 10 to 20 mph ENE | 2% |
| Tuesday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 13 to 20 mph ENE | 25% |
| Wednesday | 63°F | Chance Rain Showers | 16 mph ENE | 37% |
| Wednesday Night | 47°F | Chance Rain Showers | 7 to 16 mph ENE | 36% |
| Thursday | 66°F | Slight Chance Rain Showers then Partly Sunny | 7 to 13 mph ENE | 16% |
| Thursday Night | 48°F | Mostly Cloudy | 5 to 13 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 | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Bay City, MI
Last spring frost
May 3
First fall frost
Oct 14
Growing season
161 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, Auburn 2Ne, Mi (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.