Bay City, MI Weather & Growing Conditions
This Afternoon
70°F
Light Rain
Rain. Mostly cloudy. High near 70, with temperatures falling to around 66 in the afternoon. South wind around 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain | 16 mph S | 82% |
| Tonight | 48°F | Light Rain | 10 to 14 mph SW | 93% |
| Thursday | 56°F | Light Rain Likely | 12 to 16 mph SW | 63% |
| Thursday Night | 37°F | Chance Light Rain then Mostly Cloudy | 8 to 13 mph W | 51% |
| Friday | 48°F | Light Rain Likely | 10 to 14 mph NW | 69% |
| Friday Night | 31°F | Light Rain Likely | 9 to 13 mph NNW | 67% |
| Saturday | 51°F | Partly Sunny | 10 mph NW | 3% |
| Saturday Night | 28°F | Partly Cloudy | 6 mph W | 0% |
| Sunday | 58°F | Sunny | 6 to 15 mph WSW | 6% |
| Sunday Night | 32°F | Partly Cloudy | 6 to 10 mph W | 6% |
| Monday | 59°F | Mostly Sunny | 6 to 13 mph W | 0% |
| Monday Night | 38°F | Partly Cloudy | 7 to 12 mph WSW | 1% |
| Tuesday | 61°F | Sunny | 7 to 13 mph W | 1% |
| Tuesday Night | 33°F | Partly Cloudy | 3 to 8 mph WNW | 1% |
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 Nov 4, 2026.